- cctalk - classiccmp.org

by Guy Fedorkow

Vintage computer enthusiasts might want to keep track of where to find CRT-based analog oscilloscopes, for use as output devices. The early MIT and Lincoln Labs computers used D/A converters to steer and activate the beam on analog scopes to draw vector images. Working on Whirlwind simulation, we've been able to get this technique to work with "real" oscilloscopes, e.g., Tek 475, but we have not yet found a single DSO that has X/Y _and_ Z inputs (let alone the required phosphor fade). Myself, I have a couple scopes with backups, so I'm not in the market for another one. But others might consider the option... /guy fedorkow Date: Mon, 01 Apr 2024 22:33:38 +0000 From: Just Kant<kantexplain(a)protonmail.com> Subject: [cctalk] oscilloscopes To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk(a)classiccmp.org> Message-ID: <xVKPUUPAeHv0_Gdsaq0al3Lji6a5VLAX2wRSUo5YhZwiADr5zn171nRBM NxX-XE1ru7jPj1GFbu0aE3uBwUsVKxlU_XAYKX9B0x42zJZADc=(a)protonmail.com> Content-Type: text/plain; charset=utf-8 I have more then I need. All the working ones are HP w/color crts, and as far as older, verifiably vintage tools (right down to the 680x0 processor in either) I have to admit I favor them as a brand. Call we an oddball, weird egg, badges I wear with pride. But who could resist the allure of the newer ultra portable, even handheld units (some with bandwidth or sampling rates to 50mhz). I'm a big cheapo. But there's no real reason to agonize over a 65 - 200$ or thereabouts acquisition. It's a bit tiring to wade through the piles of availability. I favor a desktop unit, larger screen (but not always, careful). But most of those need wall current I think? The convenience of a handheld battery powered unit obviously has it's benefits. I will always love and dote upon my color crt based HPs. But the damned things are so heavy, so unwieldy. Judy-Jude knocked my 54111d over, hit the paved floor, shook the house. And still works! Built to withstand an atomic bombardment.

1 year

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cheap boards for 16/32 bit apps

by Just Kant

Ifo you absolutely must run something old, yet don't want to deal with the complexities of modern emulation: https://www.ebay.com/itm/191322319264 - drivers, whatever is needed, likely to be included on floppy. Ask seller. Not sure what tbe form factor it is. Who cares, nail it to a board or the wall. https://www.ebay.com/itm/283869740055 - obviously a lot faster. 2nd cpu isn't necessary or necessarily beneficial, but it is mandatory (says me, don't be a plebe). Unlike the Intel S5000 series serverboards, this bad boy has a FLOPPY connector. Should boot dos. But I haven't owned 1 yet. Can't remember if I even tried to boot my s5000vsadimmr4 or whatever I had from a dos loaded boot cd. Just can't. But my board did boot Windows 2000. Not too shabby. No drivers or i/o plate with this though. Drivers for Win2k are on tne net. I even foumd a manual I think. Check with me if you have need. The Intel boards have support for Win2008. NOT this board afaik. If that matters to you. Serverboards of this gen/chipset have steemy hot ram. You can nail this to the wall also. But have a desk fan to keep it all cool.

1 year

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WTB: PSU for DEC PDP8F

by robinson＠tuberadio.com

Hi there, I need a power supply for my PDP8F computer. It is missing. The PDP8F 19" chassis box came in 3 different depths, 600 mm (PSU front to back) 370 mm (PSU across the back) 300 mm (PSU front to back) I need the shallow one, the 300 mm PSU front to back. Do you have one available, or know where I can get one please. Even if it is dead! regards ray

1 year

4
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Looking for an HP 9000/778 workstation B160/180

by Keith M

I'm looking for an HP 9000 Visualize workstation, like a B160L or B180L+. I'll be attending VCF East in a few weeks so might find one there. Has anyone used Cypress technology out of Clearwater, FL? It seems they provide a nice, fully configured to spec turnkey solution, but there's no doubt they charge for it. http://www.cypress-tech.com/ Any better HP-specific forums or references would be appreciated! Thanks

1 year

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oscilloscopes

by Just Kant

I have more then I need. All the working ones are HP w/color crts, and as far as older, verifiably vintage tools (right down to the 680x0 processor in either) I have to admit I favor them as a brand. Call we an oddball, weird egg, badges I wear with pride. But who could resist the allure of the newer ultra portable, even handheld units (some with bandwidth or sampling rates to 50mhz). I'm a big cheapo. But there's no real reason to agonize over a 65 - 200$ or thereabouts acquisition. It's a bit tiring to wade through the piles of availability. I favor a desktop unit, larger screen (but not always, careful). But most of those need wall current I think? The convenience of a handheld battery powered unit obviously has it's benefits. I will always love and dote upon my color crt based HPs. But the damned things are so heavy, so unwieldy. Judy-Jude knocked my 54111d over, hit the paved floor, shook the house. And still works! Built to withstand an atomic bombardment.

1 year

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The 8008

by Murray McCullough

I’ve read with great interest, over the past short while, a few interesting articles on the history of the Intel 8008(officially released in April 1972) as it was the forerunner of what was to become the personal computer industry. And done with less than 4000 transistors. I saw one at a computer shop/store in Toronto in the latter 1970s’ but had no idea the seminal role it was to play in microcomputer history. Happy computing! Murray 🙂

1 year

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Amoeba OS

by Bill Gunshannon

I know this is a real long shot but is there any chance someone has a copy of the original distribution of the Amoeba OS from the University in the Netherlands? Searching the web finds only the current version which runs on X86. I am looking for the original which also ran on Sparc and (of the most interest to me) the VAX. Remember when they said now that we had the web nothing would ever be lost again? :-( bill

1 year

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typical IC kits on Amazon and elsewhere

by Just Kant

Clearly all or virtually all chineseum, correct? That being the case, um, what type.of.quality can be expected? Some are fairly cheap. I guess thenworld isn't to be expected.

1 year

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Re: need a 5150 motherboard

by Gregory Beat

MTM Scientific (Clinton, MI) offered modern redrawn IBM PC 5150 base board and a Full Kit, at one time. https://www.mtmscientific.com/pc-retro.html While he is no longer selling separate blank 5150 boards, you could inquire about Gerbers. greg w9gb

1 year

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Re: need a 5150 motherboard

by Marvin Johnston

Just out of curiosity, what are you using this board for? The IBM 5150 uses at least three different mother boards, 16K, 256k, and I *think* 512K soldered in RAM. Each is expandable to 640K with 3rd sourced RAM boards. I should have (somewhere) at least one of each. I also have several 5150 complete units including keyboard (not so sure about the monitors.) Marvin > Message: 3 > Date: Fri, 29 Mar 2024 20:04:52 +0000 > From: Just Kant <kantexplain(a)protonmail.com> > Subject: [cctalk] Re: need a 5150 motherboard > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: <qnfmO_296S6f9hb_wDChuncqBLx2N4gVhPm4tDG62TohL7PxE3kyLLi-K > GF90Qn4F1qIjDg9zX6isIYVyVHgohkRHHQfwzcnS3zKK8LHe0s=(a)protonmail.com> > Content-Type: text/plain; charset=utf-8 > > If you're willing to ship, I'll offer 30$ total. But it has to be IBM. > > Sent with Proton Mail secure email. > > I have one at Kennett Classic for sale, I think it's $20. I believe it's > an original IBM, but it may be a close clone. Untested. > b >

1 year

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stack of Tab books for sale

by Just Kant

Electronics, robotics, lasers. 10 in all. Overall comdition 6 or so out of 10. 50$ + shipping. NJ.

1 year

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need a 5150 motherboard

by Just Kant

The board itself, including the traces, has to be in good shape. Don' t care about it's functionality, or even if chips are missing. An actual IBM product, regardless of revision. Might consider an entire 5150 box. NJ. Sent with [Proton Mail](https://proton.me/) secure email.

1 year

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Re: Amoeba OS

by Bill Gunshannon

On 3/28/2024 7:29 PM, Alexander Schreiber via cctalk wrote: > On Thu, Mar 28, 2024 at 05:02:10PM +0000, Alessandro Mazzini via cctalk wrote: >> Sorry if I intrude... now is no more possible to obtain hobbyist licenses for vms ?? > > Not for OpenVMS/VAX, that stopped more than a year ago. IIRC you _can_ > get something like[1] it for OpenVMS/amd64 from VMS Software. > > The only legal[0] workaround for VMS on VAX is to go back all the way > before LMF was introduced which IIRC means running VMS 4.4 and nothing > newer. > > Sad and mildly irritating, but nothing we can do about it. > > Kind regards, > Alex. > > [0] Personal opinion. Worth every cent you paid for it. I'm not a lawyer > and I never played one on TV. Void were prohibited. Caveat emptor. > [1] Last time I checked, there was a time limited "educational purposes" > virtual machine image one could download and run with the appropriate > hypervisor software. ^^^^^^ That is going away, too. bill

1 year

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Re: Amoeba OS

by Bill Gunshannon

On 3/28/2024 1:25 PM, Paul Koning via cctalk wrote: > > >> On Mar 28, 2024, at 1:02 PM, Alessandro Mazzini via cctalk <cctalk(a)classiccmp.org> wrote: >> >> Sorry if I intrude... now is no more possible to obtain hobbyist licenses for vms ?? > > You can still get one for OpenVMS/x86. > As of the past few days, that may not be the case anymore. bill

1 year

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WTB: Cromemco System Zero

by Jonathan Chapman

All, I'm looking for a Cromemco System Zero, doesn't matter if it's empty or not. Please contact me off-list if you have one to sell/trade or know of one! Thanks, Jonathan

1 year

3
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Cleanup time again

by Bill Gunshannon

On 3/26/2024 9:15 AM, Paul Koning wrote: > > >> On Mar 26, 2024, at 8:57 AM, Bill Gunshannon via cctalk <cctalk(a)classiccmp.org> wrote: >> >> >> >> On 3/25/2024 9:51 PM, Henry Bent wrote: >>> On Mon, 25 Mar 2024 at 20:14, Bill Gunshannon via cctalk <cctalk(a)classiccmp.org <mailto:cctalk@classiccmp.org>> wrote: >>> Oops. I guess the fingers work as good as the memory. Sorry >>> about that. I've got about 20 of them. I know they haven't >>> been used since they were taken out of the VAX Cluster I ran >>> at the University. Nothing I have used the SB boxes with since >>> then would know what to do with 9GB of disk space. :-) >>> But, if needed I could probably test them on a PC I have with >>> an Adaptec SCSI in it. It's intended for Ersatz-11 but I expect >>> does could use a disk that big. Too bad there's no way to read >>> them. Might be some interesting stuff left behind by the VAX. >>> Why is there no way to read them? If you have a PC with a SCSI card you can easily boot into the Linux or BSD distro of your choice and make a dd (or ddrescue) image of the entire drive, which could then be accessed by whatever means. >> >> >> These disks were part of a really large RAID array in a SAN connected to >> the VAX cluster. There is no way of reconstructing it and so no way to >> extract usable information. >> >> bill > > Do you have just part of the RAID set, or enough disks to make a complete one? Don't know, but doubt it. Some of the disks have probably been used for other purposes since the VAXen went away more than 20 years ago. > If the latter then it's a matter of reverse engineering the RAID layout, > which is likely to be doable. While possible, I think hardly likely. I don't even remember what the appliance was. Something DECish. bill

1 year

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DEC Processor Books

by Bill Gunshannon

I have often wondered about the people we find in the various DEC Processor (and other) books. Were they models in staged photo-sessions or were these candid shots from DEC facilities and if so, can anyone identify who they might be. Looking thru some of the books again I came across an interesting photo on page 42 of the 1981 pdp11 processor handbook / pdp11 04 24 34a 44 70. If you take a magnifier to the picture you will find the system presented in that photo is not a pdp11 but a VAX. :-) I wonder what other DEC systems are contained in these photos? bill

1 year

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How to shutdown RT11?

by W2HX

I just got a pdp-11 to boot and it seems to have rt-11 installed. How do I do an orderly shutdown? Google has info on simh but this ain't that. Thanks! 73 Eugene w2hx

1 year

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Someone with ExpressPCB: can you convert these to Gerbers?

by Cameron Kaiser

I'm trying to build some prototype Tomy Tutor cartridges of my own but I'm all thumbs in KiCad, and while prefab ones exist that I can just add an EPROM to, they're in ExpressPCB and PCBWay wants Gerbers. This Mac won't run ExpressPCB, or at least not in a way that wouldn't involve a significant expenditure. Is someone out there with a copy of ExpressPCB willing to convert these to Gerbers I can upload? They're quite small so it should be a simple task. If so, please contact me off-list with many thanks! -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser(a)floodgap.com -- E pluribus Unix ------------------------------------------------------------

1 year

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vic-20 basic on cartridge

by Jacob Dahl Pind

I got a vic-20 in a painted case, with a biacom label, and a modified VIC-1110 8kb memory, where there have been added a 8kb eprom have been to the left side where the additional 8kb could be installed. https://telefisk.org/biacom_8kb_a000+8kbmem.rom https://telefisk.org/biacom_basic.txt The autostart rom code, that disables runstop, moves and starts basic , does seem to initialize everthing like a normal start does. Adding the rom to vice without reset and do a poke 44,161, to move the basic start to 41216, one can look at the code. The software seems to be made to print signs, but I havent had much luck getting vice to print, I only get a blank page. Looking at the code line 60 # Line Spacing of n/216 inch chr$(27) "3" chr$(n) line 61 # chr$(14) One-line Expanded Print # chr$(20) cancel expanded print line 68 # single density 60dpi line lenght 135 + (256*1) does look like it match up to the commodore/epson codes, printing the basic list with open1,4,7:print#1:cmd1:list works in text and graphics for the mps80x, but not from the basic code there. Wonder if I am running into a bug with the print emulation or it was made to use a different printer ? Regards -- Jacob Dahl Pind | telefisk.org | fidonet 2:230/38.8

1 year

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Plessey 703185-100C

by Bill Gunshannon

So, sorting thru stuff I came across this white elephant again. I never found anything to positively identify it but I always assumed it was some kind of buss extender. One board is fully populated with chips and the other connected together with a ribbon cable is totally passive. But this time I found the funniest thing about it. The passive end has a sticker on it with an expiration date. I have to admit I have never found an expiration date on any of my PDP or VAX hardware before. :-) bill

1 year, 1 month

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VCF East Hotel Block #3 (Wall, NJ)

by Jeffrey Brace

VCF East Hotel Block #3 I have opened up another hotel block: Red Roof Inn 11 Centre Plaza Eatontown, NJ 20% discount. Call 732-389-4646 before the cut off date 03/31/2024 and book your room under the Vintage Computer Festival East group name. <jeffrey(a)vcfed.org> For tickets: vcfeast.eventbrite.com April 12-14, 2024 Wall, NJ https://vcfed.org/events/vintage-computer-festival-east/

1 year, 1 month

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Re: VAX 4000 console SLU in need of some TLC

by Antonio Carlini

On 21/03/2024 22:03, Jonathan Stone wrote: > What kind of VAX 4000? One with DSSI connectors on the "S:U", or the > /VAX 4000-200/KA660, which has serial and Ethernet? IIRC you can > klludge up the latter using a KA630 SLU, and either re-using the > AUI/10base-2 part of the SLU, > or kludging one from a DEQNA/DELQA to act like the AUI-select switch > setting and AUI of the original > Those come off the KA660 in a single IDC connector, 50 pin if memory > serves. > > I have no idea about substituting for DSSI. It's a VAX 4000-300 (KA670) in a BA440, so it has two DSSI, ethernet, the usual switches and LED display. I can switch ethernet between AUI and BNC (the green LEDs change) and I have known working DETPM AUI<->RJ45 interfaces, so ethernet may be OK. I have found one panel for a KA650 (uV 3500/3600) that has an OK connector but is otherwise a bit toasty, so I'll try carefully removing that tomorrow. If that goes OK, then I'll remove the MMJ socket from the VAX 4000 console SLU: it's dead so there's not really much risk here as long as I'm careful with the PCB. At least I could then tack on 6 wires and find a way of interfacing. I do have at least one H8584-AC, which is an MMJ socket and an RJ45 plug. So with a bit of measuring I could probably find an RJ45 socket and rig up some temporary franken-console. Or, if the KA650 donor is really too far gone, and its socket survives half a dozen cable insertion-removals with no harm, then I could just fit that in place. If the console ethernet doesn't work, I think I can drop in the DELQA with appropriate handles from the KA650 system ... I think that the BA440 Q-bus metalwork and the BA213 metalwork are compatible. If not I have one Q-bus DELQA panel and I'm sure that neither the VAX nor anything else in there with it care too much about RF interference these days! I can find new MMJ plugs all over the place (admittedly I'm assuming that Mouser and Farnell could actually supply them!!) but the corresponding sockets seem to be lost to time. Or at least they remain beyond my goolge-fu. Antonio -- Antonio Carlini antonio(a)acarlini.com

1 year, 1 month

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Two IBM 360's available in the UK

by Adam Bradley

Hi all, Some of you may remember that I (Adam) and another chap (Chris) rescued two IBM 360/20 systems out of an abandoned building in Nuremberg back in 2019 and brought them to the UK (our blog is here: https://www.ibm360.co.uk/). We have since basically found ourselves unable to effectively progress the project due to personal & professional commitments. For various reasons (explained in our latest blog post) we are testing the waters for making the machines available to the right sort of people. We are therefore inviting proposals or offers focused around one of the following core ideas: 1. A museum or preservation organisation takes the machines on permanent loan or possibly as a donation depending upon exactly what the terms look like 2. A private entity takes the machines on loan for display for a fix period 3. A foreign museum takes the machines, with negotiation around coverage of our costs 4. A private collector purchases the machines from us for a sum to be negotiated at the time If you have an alternate proposal we would also be open to hearing it. We have three main systems in the collection, as detailed below: *Red IBM 360 Model 20 System* 1 x IBM 360 Model 20 CPU in Red 1x 2203 System Printer 2x 2311 Disk Drives 1x 2152 System Console (possibly the last remaining example of this in the world, though in poor condition) 1x 2560 Punched Card Reader/Punch/Sorter 1x 2501 Punched Card Reader 2x 2415 II Tape Drives (One master, one slave) (Possibly only remaining examples of this model globally) 25x IBM Disc Packs *Blue IBM 360 Model 20 System* 1 x IBM 360 Model 20 CPU in Blue 1x 2501 Punched Card Reader 1x 1403 Printer *System 370/125* 1x 370/125 CPU – Unknown condition 1x 3504 Punched card reader (incomplete) *Miscellaneous* 1x 029 Card Punch 1x 5471 System Console Assorted other spares and unknown/incomplete components Around 12 full boxes of brand new IBM punched cards ----------- In an ideal world we would like to see everything go together, but we understand that this is an enormous amount of kit and that might not be possible. We are not willing to split up individual systems, but we are willing to split things by the groupings above. For instance if there was interest in only the red system due to its complete set of peripherals, we would be willing to negotiate on that basis. It is extremely rare that systems such as this become available, and these are two of only a handful of privately held IBM 360’s in the world. If you have an idea or a proposal, please email me directly at this address. Please do NOT email me to suggest I contact X museum unless you are a representative of that museum or hold a direct relationship with them and know they are interested. We are genuinely sad that we’ve been unable to work on this project and take it where we wanted it to go. We set out with strong intentions, but alas, as is often the case life took over and we were unable to push forward in the way we wanted to. We hope that someone comes along who will be able to keep the systems safe for future generations. Kind Regards, Adam Bradley

1 year, 1 month

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Bitsavers Zuse scans

by Christian Corti

With great interest, I have seen that there are now scans for the Z23 (perhaps more coming soon :-) ). But I have to admit that I am so much disappointed of the quality. I mean, whoever scanned this all, did he have a single look at the output? I do this, for each of the many scans, may they be only a single or many hundred pages. Example: .../zuse/Z23/Zuse_Z23_Beschreibung_einschlie%c3%9flich_der_Zusazgeräte_Februar_1962.pdf PDF pages 16/17: this is a no-go. This must not happen in a document uploaded to bitsavers. Pages 32-35 (and many others, too): what the heck happened here?? And there appears to have been some "intelligent" post-processing of the images that renders them very artificially. Sorry for the rant, but that is not what I would accept as archiving material. I'd offer to rescan them (guessing that the origin is from Germany) reasonably. Christian

1 year, 1 month

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Semi-OT: MAX180 Evaluation Kit ROM/Diskette Image

by Jonathan Chapman

All, I'm looking for an image of the ROM or companion diskette for the Maxim MAX180 Evaluation Kit (MAX180EVKIT). I've got one that has a custom application ROM in it. Thanks, Jonathan

1 year, 1 month

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NRAO Data tapes

by Dani Werts

Hello, I'm an employee with the National radio astronomy observatory here in Socorro New Mexico. As part of our NGVLA upgrades, we are seeking to get rid of old data tapes from the tape reel days of Computing. These contain things such as the boot loaders, OS, specific collection programs and antenna movement programs. I personally would hate to see these just wind up in the literal dumpster and would like to see them sent out to a museum or an archiving body that can preserve them and keep them safe as a dynamic part of history. If anyone is interested or knows someone who would be interested in the VLAs data tape library please let me know. V/R Danielle Werts Front end engineer VLA Socorro New Mexico

1 year, 1 month

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Re: Voyager spacecraft computer

by rich.cini＠verizon.net

There is a printed version of this printed by Alpha Books, ISBN 1-56761-463-9. I bought it years ago (1998) . Not sure if it’s 100% the same text, but it has a lot of nice pictures and was issued around the 25th anniversary of Apollo 11. It’s on Amazon right now for $7.12. Rich On 3/15/24, 8:14 PM, "Ethan Dicks via cctalk" <cctalk(a)classiccmp.org> wrote: On Fri, Mar 15, 2024 at 6:49 PM Charles Dickman via cctalk <cctalk(a)classiccmp.org> wrote: > Voyager 1 is in the news recently because of communications problems and > possible solutions. Is there an online source for documentation on the > Voyager systems, especially the computers and navigation systems? > > I have enjoyed reviewing the Apollo systems documentation on the Virtual > AGS Home Page and wondered if there were similar documents available for > Voyager. "NASA Contractor Report 182505 Computers in Spaceflight: The NASA Experience" More of a top-level tour of a number of platforms, it covers, in quite some detail, systems from Gemini to the Space Shuttle and mentions the RCA 1802 numerous times. Samples of some NASA DSLs (HAL/S and GOAL). Extensive citations and bibilography. Voyager and Galileo are covered in Chapter 6. Public domain. PDF link at: https://ntrs.nasa.gov/citations/19880069935 Excellent stuff in there. -ethan

1 year, 1 month

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Voyager spacecraft computer

by Charles Dickman

Voyager 1 is in the news recently because of communications problems and possible solutions. Is there an online source for documentation on the Voyager systems, especially the computers and navigation systems? I have enjoyed reviewing the Apollo systems documentation on the Virtual AGS Home Page and wondered if there were similar documents available for Voyager. -chuck

1 year, 1 month

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SMD/ESDI emulator progress report

by Guy Sotomayor

Hi, I just wanted to provide a bit of a progress report on the SMD/ESDI emulator project. Now that I'm retired I have a bit more time to actually work on it. Previously I was just doing a bunch of research and writing notes on the design. I now have a solid design and I'm starting with the implementation. I'm going to list some of the design goals and then sketch out a few of the major issues and how they're being addressed. Goals: * Emulate any drive geometry * Emulate a drive's performance characteristics * Work across different interface types * Fully built emulator cost below $500 Major Issues: * SMD/ESDI have head switch times < 10 microseconds (basically the time it takes for the read amplifiers to settle on a "real" drive). Solving this issue drives the majority of the design * Address marks on a "real" drive are implemented by writing a DC signal on the track and the read circuitry detects that and generates the address mark signal When looking at the specifications for SMD and ESDI disks there aren't really a lot of difference in how the drive behaves. The interfaces differ in detail but in reality the differences are pretty minor. So the current design should allow for 95+% code sharing between SMD and ESDI emulators. To solve the head switch performance, it is necessary to have an entire cylinder in some sort of RAM. This allows for very fast head switch times (e.g. the selected head just addresses a particular portion of the RAM). However, this means that loading a cylinder (which in some cases could be as much as 1MB) could take considerable time. It will take even longer if some of the tracks in the cylinder are "dirty" due to them having being written to prior to the seek. Since I want the emulator to be able to faithfully emulate drives in all respects, the limiting factor is the cylinder-to-cylinder seek time (e.g. moving from one cylinder to another cylinder that is adjacent). This is typically in the 4-8ms range. So doing the math, one must move 1MB in 4ms (that turns out to be ~250MB/sec of bandwidth...using 32-bit transfers, this means over 60M transfers/sec). The above implies that the cylinder RAM and where the storage holding the cylinders of the image must be capable of at least 60M transfers/sec between them. This is going to involve a complex FPGA that is able to have large internal RAMs and a direct connection to some sort of DRAM to hold the full image. I've chosen to use a SOM (System-On-Module) version of the Xilinx Zynq 7020. This has dual 32-bit ARM cores (plus a whole bunch of peripherals), 32-bit DDR3 memory interface, plus a fairly large FPGA with enough block RAM to contain the maximum cylinder. The calculations I've done should allow a new cylinder to be loaded from DRAM into the cylinder RAM in 4-8ms (I think with a few tricks I can keep it in the lower range). I've looked a quite a few Zynq SOMs (and have acquired quite a few for evaluation purposes). I finally found one that's ~$200 (most of the others are in the $400-$1000+ range). This SOM brings out most of the Zynq's I/Os (94 I/Os) in addition to having ethernet, USB, serial, SD card, etc. as well as 1GB of 32-bit DDR3 DRAM. It also runs Linux which means that developing the SW is fairly straight forward. The next issue was how to emulate address marks. The emulated drive will have a bit clock which is necessary for clocking out the data when reading (or out when writing). The bit clock is always running (just like a "real" drive when spinning). That will drive a counter (which represents which bit is under the emulated "head"), that counter (along with the head number) will be used to address the block RAM. The counter is always running, so as to emulate the spinning disk. The address marks are emulated by having a series of comparators (one for each possible sector). They compare the bit counter with the value associated with the comparator, if there's a match then that signals an address mark. It's bit more complicated because writing address marks (in the case of soft-sectors) has to be dealt with. The emulator is composed of 4 major components: 1. Emulator application plus some utilities I'm currently writing all of this code...since I'd been a SW engineer for 50+ years, this is all "production" quality code and is extremely well documented...still a ways to go. 2. Linux device driver which provides the interface between the emulator application and the emulator HW I haven't started on the driver yet but it should be fairly straight forward as it really only provides an interface to the emulator HW to the emulator application 3. Emulator HW RTL I haven't started on this other than to do some basic blocks of what's here. It mainly is the cylinder RAM, serdes (I *may* be able to finesse this by having 32-bits on the AXI bus and 1 bit on the interface side...a nice feature of the block RAM), address mark logic, bit counter and some command decode/handling (it'll handle the seek command all in the RTL...everything else will be handled by the application. 4. Interface board This should be a fairly simple board. It's a carrier for the SOM, 3.3v-to-5v level shifters, interface circuits for SMD or ESDI (they use different interface ICs) and the interface to the cable. I'm starting with SMD just to make the board layout easier (I can just use 0.1" headers for interface cabling). I also have an SMD disk exerciser that will make it easier to make sure it's working properly. The idea is that once I have an SMD working reasonably well, I'll start on ESDI. Interacting with the emulator application can be any of the following: * config file: indicates various emulator startup options including which image (if any) to "mount" initially * command line: same as the config file * emulator utilities: these are mainly allow for changing which image is mounted, changing write protect status, querying state of emulator, etc. The utilities can be used locally by logging into to Linux running on the Zynq 7020 or by using "host" versions if the emulator is connected to a network via ethernet. One of the key utilities is creating an "empty" (that is all tracks contain all 0's) image. The image format has been finalized. It allows for almost any geometry of disk (up to 32 heads and up to 65536 cylinders). The main restriction is the 1GB of DRAM on the Zynq 7020 SOM. I expect in reality that the largest drive that can be emulated will be ~600-700MB due to DRAM. I plan on providing some standardized "templates" (e.g. they'll describe actual drive geometries and seek performance tables) so creating new images won't be too onerous. I'll be putting all of the source, RTL and board files on github under a BSD license once I get further along. -- TTFN - Guy

1 year, 1 month

2
1
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Keyboard Blockers?

by Douglas Taylor

I picked up a keyboard for a Wyse terminal at a flea market the other day. When I tried some of the keys, they couldn't be depressed. I thought, at first, some dirt or debris had gotten stuck there, but on closer look I saw something black below the keys that seemed to be stuck. I pulled a key cap off and found a U shaped piece of black plastic that was put there on purpose to prevent you from depressing the key. The question came to mind; "What sort of application would be so crude that you would have to prevent the user from depressing certain keys?" One of the keys was a Break key, which sort of made sense to me, because it would halt a PDP-11 if that was the host machine. This was the first time I had ever seen this kind of thing, was this common long ago?

1 year, 1 month

5
5
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Surplus Vintage Computer Sale @ Kennett Classic Starting

by Bill Degnan

LINK: https://www.kennettclassic.com/surplus-sale-starts-3-19/ If you can make it to Kennett Square, PA USA between now and April 19th 2024, stop in and browse our inventory of surplus vintage computing items. The link above contains answers to questions. If you want to be added to the mailing list, visit kennettclassic.com and submit a contact form. Thanks Bill Degnan

1 year, 1 month

1
0
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Did something happen to comp.os.vms ?

by Zane Healy

Did something happen to comp.os.vms and/or usenet? All the DEC newsgroups appear to be missing from Eternal September. Zane

1 year, 1 month

4
5
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Dumping an UV PROM for a Sun 386i

by Christopher Zach

Hi all! I'm working on a little side project to see why one can't put a better CPU chip into a Sun 386i. Basically with a real 386 in the socket the system will at least start to flash the LEDs on the back, but with a Cyrix chip the LEDs are frozen on. I can remove the frame buffer, memory cards, even the Timekeeper chip and I still see this behavior. Running with no CPU or no PROM chip makes the system flash no lights, pointing to the problem being code in the PROM. Now, 386 CPUs don't have the CPUID register, but they do have a little feature where upon reset EDX contains a "3" to show the CPU "type". On a Cyrix chip it contains a "4". My guess is the ROM code has at the beginning a check of EDX and if <>3 go to a halt. I'd like to dump the code, find that check, and either replace the 3 with a 4, or replace the first HALT with a NOOP. The PROM is an Intel D27010 which is an Intel 128k*8 chip. Unfortunately I'm not finding much in terms of either datasheets or PROM programmers. Does anyone know how to/have the tools to dump and reprogram this? I'll bet the old archives that talk about the "Blue Lightning 386" working for boot were due to the chip being made under license of Intel thus being allowed to have that "3" in there. But since I also have a TI 386/486 chip with 8k of L1 cache, a 486 core instruction set, faster multiplier, and clock doubling by default I think it might wind up being.... faster. C

1 year, 1 month

2
1
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5 1/4" and 3.5" disk duplication machines

by Bill Degnan

Does anyone have interest in vintage diskette duplication / duplication machines? Would this make for an interesting VCF exhibit? Does/did anyone use these commercially? Bill

1 year, 1 month

7
7
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CommonPoint for AIX

by Cameron Kaiser

Just a ping out there to see if anyone's sitting on installation media for CommonPoint (the last gasp of Taligent). Seems appropriate to try to coerce it to run on an Apple Network Server. Let me know on or off list as appropriate. -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser(a)floodgap.com -- "I'd love to go out with you, but I need to clean my toilet brush." --------

1 year, 1 month

1
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FS: PDP-11/23+ system

by Charles

Over the years, I have gradually built up a functional PDP-11/23+ system, which of course I now have no need for ;) So I'd be interested in selling it as I slowly downsize. You'd need to pick it up in south central Missouri as shipping would be impractical and expensive. Specifics: 11/23+ with 4MB RAM, selectable boot ROMs, two RL02 drives, floppy interface (set to 3.5" TEAC drive), 16-line serial ports, corporate cabinet with DEC power controller. Software including RT-11SJ, XM, TSX-Plus. Also have a VT-220 for the console which I may sell separately or with the system. Please email me *off-list* with offers, request for pics, etc. thanks Charles

1 year, 1 month

1
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IBM PC-XT

by Murray McCullough

I look back fondly on the IBM PC-XT of 41 years ago. It was very pricy here in the Great North but it allowed for a much more advanced computing environment. What one could do with a 10MB hard disk! Granted it was far more popular in the business world than the consumer one. However, it made possible much greater developments that hobbyists and experimenters latched onto. Happy computing! Murray 😊

1 year, 1 month

3
2
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VCF Midwest Hotel Booking Opens 3/8

by Jason T

Hello classic computing fans! The new website for VCF Midwest is up at https://vcfmw.org. Who knows the design inspiration without asking a (Commodore) friend?? Apologies if it doesn't render well on your device. I don't have your device! Room booking for the show will open this afternoon (Friday 3/8). It will be announced via the mailing list and a refresh of this web page (at the "HOTEL" link.) Lots more rooms this time, and we're starting with an empty block. But it's still best to book early if you want to stay at the show hotel! See you in September... -jt

1 year, 1 month

1
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Requesting Lisp Machine photos

by John Floren

I'm gathering photos of Lisp machines (of all makes and models). If you've got them scanned already, that's great, otherwise I have a scanner if you're willing to entrust your photos to me temporarily. Let's take replies off-list unless you think it'll be of general interest to subscribers. Thanks, John

1 year, 1 month

1
0
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Looking for TMS0106NC chip

by Charles

I hope a 1974 desk calculator (Radio Shack EC-2000, a re-badged TI-3500) is considered sufficiently both classic and computer for this list. :) The one IC, a TI TMS0106NC, has failed and I'm searching everywhere for a replacement. There's an -0103 on ebay from the same family which would substitute, but it's only 8 digits and this is a 10 digit machine. Plus it's $31 with postage, more than the calculator itself is worth! If anyone has one, or knows where I can get this IC, new or a pull, please let me know. Thanks!

1 year, 1 month

1
0
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RD54 Maxtor XT-2190 w/one long meep

by Jacob Ritorto

Hi! Remember the blearrnnnnt-meeeeeelrp sounding seek oscillation noise that the RD54 makes when you turn it on -- after it spins up, unlatches and loads the heads? Well, I took a chance on an el-(c)heapo ePay special RD54 that does all these things perfectly up until the seek oscillation thing and then only makes one steady meeee- sound that seems to last indefinitely (or at least until I get tired of listening to it after a few minutes). Would anyone here know enough about these disks to venture a guess at where to begin troubleshooting this? thx jake P.S. If I'm being too vague, let me restate: I can hear it spin up, bearings sound normal, hear it unlock its head lock latch, then a perfectly *slight* noise of head actuation and the normal accompanying barely audible riding-on-air head noise. Then I expect to hear the two seek tones, but only get one steady seek tone that lasts (I assume) forever.

1 year, 1 month

12
16
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Visual 50 terminal troubleshooting

by William Sudbrink

I have a Visual 50 terminal that I am now troubleshooting. I got it in the late 1980s and it worked fine until 1995. I can't find a good schematic for it or ROM images. Its symptom is that it powers up to continual beep (solid tone, not repeated beeps) with a cursor on the screen. This is not in the troubleshooting table of the manual that I have. I know the keyboard is capacitive foam pads. I was hoping that was the trouble, but it is not. I disassembled the keyboard and removed the old pads, replacing a few with some spares I had from SOL20 repairs. Has anyone corrected this problem before? I suspect that the EPROMs are going. Thanks, Bill Sudbrink -- This email has been checked for viruses by Avast antivirus software. www.avast.com

1 year, 1 month

1
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Re: mod.sources archive?

by Dennis Boone

> Googling for "mirror uxc.cso.uiuc.edu" found me one hopeful hit: > https://www.funet.fi > pub > misc > Notes.README Ron, Another good search approach that I hadn't thought of. Many thanks! De

1 year, 1 month

1
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mod.sources archive?

by Dennis Boone

Does anyone have or know of an archive of old mod.sources (predecessor of comp.sources.unix) posts? I know googlegroups has it, but that only means nothing since it's effectively inaccessible there. De

1 year, 1 month

4
5
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Decwriter III self test issue?

by W2HX

Hi all, I recently acquired a very nice decwriter III and it seems in good nick. However, the self test "hangs" on the return direction of the second line. Here is a video on it: https://youtu.be/pj6rk5Dlnbk Anyone have any ideas where to look? In local mode, it appears to work properly. I haven't tried any external serial connection yet. 73 Eugene W2HX My Youtube Channel: https://www.youtube.com/@w2hx/videos

1 year, 1 month

3
4
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QProbe2023 - QBUS Blinkenlights

by Joerg Hoppe

Fellow nerds, not sure who knows about this project, so here an announcement ... again? As QBUS PDP-11s (03,23,73,83,93, also uVAX) don't have lots of lamps&switches like the old UNIBUS machines, their owners suffer on "Blinkenlight envy". So I was pushed to pimp up the QBUS diagnostic adapter "QProbe" https://www.retrocmp.com/tools/qprobe Model "QProbe2023" has now focus on entertainment. There's a QBUS signal display in style of old PDP-10/12/15 rack header panels. It can be build into a 5.25" drive case ... or into the BA23 case itself. https://www.retrocmp.com/tools/qprobe/327-qprobe2023-overview By lucky incident you can even see the idle loop pattern of RSX11M+ on some J11 systems. See a full boot of RSX11M+ at time index 5:56 of https://www.youtube.com/watch?v=ajAcxGwK-vQ As it also has RESTART/HALT/AUX switches, it's also helpful for PDP-11s mounted case-less in a standalone backplane (like the one at https://retrocmp.com/projects/lsibox and on the "Frankenstein" video https://www.youtube.com/watch?v=hoW7Szkppww&t=403s ) Btw for unknown reasons, I cannot register to classiccmp itself ... CC me direct in your replies. kind regards, Joerg

1 year, 1 month

1
0
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Re: Paper tape in casettes...

by erik＠baigar.de

Hi Jon! > think the Bendix G-15 had cassettes for the 5-level tape > they used. Aha, interesting! Did a short search, but have not been able to find a picture of a casette. Just a pile of paper tape instead ;-) https://images.app.goo.gl/HYqkpYHJUxZeGfiA8 > of mylar tape instead of paper. OS boot tapes might be punched > on that. Yes, for heavy use (and e.g. humid environments), the mil guys obviously used Mylar or heavily oiled tape. Although not experrienced myself, I was told that the Mylar tape cuts through the guiding pins of the readers over time. And yes, it also may easily cut one's fingers ;-) > much like plain paper tape, and simple mylar alone. The latter often > comes metallized on one side, and is glossy. Yes, that is the one within the casette and the aluminum as you expect is for optical reading (Most plastics including Mylar are quite transparent for IR light and in the old days, when thungsten bulbs where used, the IR part of the light was the major part contributing to the response of the photodiodes! > input medium for the university mainframe computer (Electrologica X8), > they used optical readers rated at 2000 characters per second. Wow - that is indeed pretty fast!!! My FACIT is 1200cps maximum and stopping "on character" as it is called is VERY hard at that speed. But buffering helps here and in case of the 920M, the casette is used for, there was no buffering. So software needs to be read in one run. Best wishes, Erik. ''~`` ( o o ) +--------------------------.oooO--(_)--Oooo.-------------------------+ | Dr. Erik Baigar Inertial Navigation & | | Salzstrasse 1 .oooO Vintage Computer | | D87616 Marktoberdorf ( ) Oooo. Hobbyist / Physicist | | erik(a)baigar.de +------\ (----( )---------------------------+ | www.baigar.de | \_) ) / +----------------------+ (_/

1 year, 1 month

15
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Re: Paper tape in casettes...

by Erik Baigar

Hi Paul, thanks for your answer and the interesting links... > > Aha, interesting! Did a short search, but have not been able to > > find a picture of a casette. Just a pile of paper tape instead ;-) > > > > https://images.app.goo.gl/HYqkpYHJUxZeGfiA8 > > Bitsavers has a collection of G-15 manuals. For a picture of an > open cassette, see PDF page 27 in http://bitsavers.org/pdf/bendix/g-15/60061400_G15D_Parts_Manual.pdf. Ahh OK, I see. But that is not a hermetically sealed casette suitable for outdoor use in windy, rainy weather like the one on my desk. As the thread deviated meanwhile, I guess the Elliott Mylar tape casette is a unique leftover from the old days ;-) Best wishes, Erik. ''~`` ( o o ) +--------------------------.oooO--(_)--Oooo.-------------------------+ | Dr. Erik Baigar Inertial Navigation & | | Salzstrasse 1 .oooO Vintage Computer | | D87616 Marktoberdorf ( ) Oooo. Hobbyist / Physicist | | erik(a)baigar.de +------\ (----( )---------------------------+ | www.baigar.de | \_) ) / +----------------------+ (_/

1 year, 1 month

1
0
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Paper tape in casettes...

by Dr. Erik Baigar

Hi there - recently I posted a small video on a rugged paper tape casette... https://www.youtube.com/watch?v=O2jnThYsPKc I wonder whether anyone kows if someone else had the idea of putting paper/mylar tape into a casette for repeated use e.g. to load an OS or similar. Best wishes, Erik. ''~`` ( o o ) +------------------------.oooO--(_)--Oooo.---------------------------+ | Dr. Erik Baigar Inertial Navigation & | | Salzstrasse 1 .oooO Vintage Computer | | D87616 Marktoberdorf ( ) Oooo. Hobbyist / Physicist | | erik(a)baigar.de +----\ (----( )-----------------------------+ | www.baigar.de | \_) ) / +----------------------+ (_/

1 year, 1 month

5
4
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"HB A8" ISA SCSI controller BIOS image?

by Ken Seefried

I have some 8-bit ISA 53c90a based SCSI controllers labeled "SCSI HB A8". Mine are made by "Advanced Information Concepts", but apparently they were also made by "Control Concepts". Unfortunately, mine don't have the BIOS chips installed. I have a picture of the card with a chip installed labeled "Ver-3.02 CCI 0991", so I know an 8k or 16k boot prom existed. Does anyone have such a card that they'd be willing to dump a prom image from (or let me borrow it to dump). KJ

1 year, 1 month

1
0
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Mexico’s SNIPE system?

by Jonathan Katz

A bit of an odd one…. I’m trying to figure out what type of computers ran Mexico’s infamous SNIPE electoral vote system in 1988. I have an LA Times article from 1994 talking about how the NEW system was RS/6000-based. But this was a system built in 1987-1988. Narcos Mexico had a pretty re-creation but I didn’t spy any brand names. Any ideas? I figure there may be photos or press releases from that time but my Google-fu (and español) is weak. -Jon +44 7792 149029

1 year, 1 month

1
0
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Seeking Z180 Assembly Programmer

by Sellam Abraham

When I was at the VCF SoCal last weekend I met a gentleman who was looking for someone with Zilog Z180 assembly language experience. He says he needs someone to rewrite code in what sounds like some kind of terminal server product he sells(?) to convert the protocol it uses from Televideo format to ANSI (because Televideo is getting harder to support). This gentleman said he has a modest budget for the project. Let me know if you might be particularly qualified and interested and I'll put you in touch with him and you can go from there. Sellam

1 year, 1 month

1
0
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Turbo Prolog

by Just Kant

Has anyone used it or something contemporaneous? Is it at all applicable to any degree to today's approach to AI/machine learning tasks? I would like to perhaps eventually create a game, probably not chess, lilely something simpler. The old expert system modeling paradigm seems to have largely if not entirely fallen out of favor. From what I'm reading though TP seems to be geared for that.

1 year, 1 month

6
8
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Re: Turbo Prolog

by Win Heagy

I bought a copy at a mall in Nashville TN some 30+ years ago. I was working at an airline at the time and was interested in the crew scheduling problem, as well as all things AI related. I never got too far using Prolog on that particular problem. I found the disks and manual like 13 years ago and made a short video and put it on youtube. Turbo Prolog was pretty speedy even on old hardware. https://www.youtube.com/watch?v=svcxu0xiH34 Win

1 year, 1 month

1
0
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Another blast from the past...

by Bill Gunshannon

So, here I was binge watching a scifi series called "Night Sky", which sadly was not renewed, but I digress... In one of the episodes two of the characters go to see a man who apparently is a monitor for something having to do with the devices that teleport people all over not only earth but other planets as well. He has this workbench covered with computers that look like mostly PC's but some could be Suns or other real computers. And many displays with really cool graphics. And sitting in the middle of all of this is ------- An IMSAI-8080. :-) Front panel is clearly visible in a number of scenes. Of course, with the program being canceled one has to wonder, did it go back into a prop warehouse somewhere or just the nearest dumpster? :-( bill

1 year, 1 month

2
1
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VCF SoCal

by Sellam Abraham

I'll be attending VCF SoCal on February 17-18 in Orange (California) in the capacity of a presenter (on a panel and a solo presentation). Is anyone else planning to attend the event? Sellam

1 year, 2 months

20
44
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@r.stricklin about VMS TK50 images

by Hans-Ulrich Hölscher

Hi, I tried several times to contact you directly via bear(a)typewriiten.org, but no success, so I'm trying it this way now: Could you please provide the images for the following software from your collection: - AQ-KZ18B-BE VAX/VMS V4.7A BIN TK50 - AQ-JG62A-BN MicroVMS V4.5 BIN TK50 - AQ-JT80A-BN MicroVMS V4.5B BIN TK50 I'm a collector of DEC hardware and software and I like to complete my "OldVMS collection". You know it's like stamp collecting - you always want the complete set ... Let me know if there is anything I can do for you! Regards Ulli The VAXorcist

1 year, 2 months

1
0
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FTGH: (3) Qualstar 1260 9 track tape drives pertec interface

by js＠cimmeri.com

2 units working when properly stored a few years ago. 1 unit, parts unit. Must take all 3. Tested successfully only with a PC and a VAX. Located in Frederick, Maryland, USA

1 year, 2 months

8
17
0 0

Re: SOCAL VCF

by Smith, Wayne

> Date: Sun, 18 Feb 2024 20:12:15 -0800 > From: "Ali" <cctalk(a)ibm51xx.net> > Subject: [cctalk] SOCAL VCF > To: "'General Discussion: On-Topic and Off-Topic Posts'" > <cctalk(a)classiccmp.org> > Message-ID: <059c01da62e9$d2b6ac60$78240520$@net> > Content-Type: text/plain; charset="us-ascii" > > So did anyone go? How was it? I never heard back from the organizers regarding the ticketing situation despite my, and Sellam's, best efforts so I skipped it. Hopefully, the event went better then the organization and the next one will have the bugs ironed out. > > -Ali I have been to around 10 VCFs, but not since VCF West XI in 2016. I drove down on Sunday morning and enjoyed it. There were some very interesting exhibits, many of which were video game/console or adjacent (e.g., Commodore SX-64) oriented. There was some great emulation work on display as well. Of note was what was not there. No IBM, no HP, no S-100, almost no big iron (a static Data General machine was the exception), and almost nothing pre-1980. The facility was quite nice, including the presentation room. The consignment table looked pretty picked over by the time I got to it. There was a guy in the consignment area with a small table selling comic books and he also had some Funkos. I wish I had actually known about the show prior to two weeks before so I could have at least thought about putting together an exhibit. Hopefully the show will continue! ------------------------------ Message: 3 Date: Fri, 16 Feb 2024 23:03:43 -0800 From: "ShowRunner(a)VCFSoCal.com" <ShowRunner(a)VCFSoCal.com> Subject: [cctalk] Re: VCF SoCal To: Sellam Abraham <sellam.ismail(a)gmail.com> Cc: cctalk(a)classiccmp.org Message-ID: <7D28E49F-BB8E-4049-9056-5265721253FE(a)VCFSoCal.com> Content-Type: text/plain; charset=utf-8 Thanks Sellam. Tickets can be purchased at the door. I’m sorry they’re having trouble. We’ve got a constant stream of ticket purchases coming through. Perhaps try another browser or on their mobile? Micki > On Feb 16, 2024, at 2:26 PM, Sellam Abraham <sellam.ismail(a)gmail.com> wrote: > > Hi Micki. > > I'm passing along this message from Ali. Can you please help him? > > I checked the website and verified that there is no obvious way to contact anyone in the organization for regular communication. Forgive me if I overlooked something. > > Thank you. > > Sellam > > > On Fri, Feb 16, 2024, 1:25 PM Ali via cctalk <cctalk(a)classiccmp.org <mailto:cctalk@classiccmp.org>> wrote: >> > > One last question: >> > > >> > > Do kids get in free? If so what is the age cutoff? It looks like >> > > tickets are needed for everyone but figure I would check just in >> > case. >> > > >> > >> > Never mind... Important to read all the WAY to the END. LOL. Kids >> > 12 and under are free! >> >> >> Anybody successfully buy tickets? I tried and I get an error that check out isn't working and to contact them. Of course like all good sites they provide absolutely no way to contact them. If anyone has contact info that would be great or if anyone knows that tickets can be purchased at the door? Otherwise hard pass here. No way I am driving to the OC, in possible SoCal rain traffic, without something a bit more solid.... >> >> -Ali >> ------------------------------ Message: 4 Date: Mon, 19 Feb 2024 01:26:07 -0600 From: Steve Lewis <lewissa78(a)gmail.com> Subject: [cctalk] Re: SOCAL VCF To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk(a)classiccmp.org> Message-ID: <CACG-qZxqciMv2=SZFEqnYxbSS4KfntQHym+eKzGrvT3tYLgZ2w(a)mail.gmail.com> Content-Type: text/plain; charset="UTF-8" I was able to make it, and the weather turned out very fair. Here is my summary review of the two days. Sorry about the ticket issue - I was able to get an online ticket the day before the event without issue. VCF SoCal 2024 — voidstar <https://urldefense.com/v3/__https://voidstar.blog/vcf-socal-2024/__;!!AQdq3… > https://urldefense.com/v3/__https://voidstar.blog/vcf-socal-2024/__;!!AQdq3… -SteveL On Sun, Feb 18, 2024 at 10:11 PM Ali via cctalk <cctalk(a)classiccmp.org> wrote: > So did anyone go? How was it? I never heard back from the organizers > regarding the ticketing situation despite my, and Sellam's, best > efforts so I skipped it. Hopefully, the event went better then the > organization and the next one will have the bugs ironed out. > > -Ali > > > > > ------------------------------ Message: 5 Date: Mon, 19 Feb 2024 00:20:02 -0800 From: "Ali" <cctalk(a)ibm51xx.net> Subject: [cctalk] Re: SOCAL VCF To: "'Steve Lewis'" <lewissa78(a)gmail.com>, "'General Discussion: On-Topic and Off-Topic Posts'" <cctalk(a)classiccmp.org> Message-ID: <000301da630c$70d69780$5283c680$@net> Content-Type: text/plain; charset="UTF-8" >I was able to make it, and the weather turned out very fair. > >Here is my summary review of the two days. Sorry about the ticket issue - I was able to get an online ticket the day >before the event without issue. Steve, Thanks for the excellent write up and the great pictures. It looks like it was a fun, and packed, event. Sorry I missed it. Hopefully I can make it next year. Yeah, I am not sure what the problem was with the tickets and I didn't know if there was going to be tickets available at the door so I opted to skip out on the 55 mile drive. I did finally hear back from Micki. Unfortunately, she didn't reply back to me directly and instead sent a reply to the list which I did not receive until tonight (Sunday) at 2300. It just wasn't meant to be this time around. LOL! -Ali End of cctalk Digest, Vol 504, Issue 1 **************************************

1 year, 2 months

1
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VCF East 2024 Tickets on sale now! (Wall, NJ April 12-14)

by Jeffrey Brace

VCF East takes place in Wall, NJ at InfoAge Science and History Museums (formerly Camp Evans). For more information: https://vcfed.org/events/vintage-computer-festival-east/ Lots of great exhibits, speakers, consignment, Atari Classroom and Glitch Works workshop. Tickets for VCF East (Eventbrite) <https://vcfeast.eventbrite.com/> – Non-VCF Members should use this link. Discounted tickets for VCF Members Only (VCF’s website) <https://vcfed.org/membership/event/info/?reset=1&id=18> – VCF members should use this link. To get the 20% discount you need to become a VCF member by Clicking Here <https://vcfed.org/membership/> Take care! Jeff Brace VCF National Board Member Chairman & Vice President Vintage Computer Festival East Showrunner

1 year, 2 months

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SOCAL VCF

by Ali

So did anyone go? How was it? I never heard back from the organizers regarding the ticketing situation despite my, and Sellam's, best efforts so I skipped it. Hopefully, the event went better then the organization and the next one will have the bugs ironed out. -Ali

1 year, 2 months

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PDP/11 Available in Denver Area

by Jason T

Hello - I was contacted recently by a non-collector who is cleaning out their parents estate. They have what they describe as a PDP-11/23 system with various accessories (maybe terminal, printer, docs, etc?) which they would like to see go to a collector, rather than a scrapper. As I am not near Denver, Colorado, I am posting here in the hope that someone out there who is may want to take on the '11 and whatever comes with it. If you are interested, please reply to me directly and I can put you in touch with the owner. -jt -- s700.net

1 year, 2 months

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Re: VCF SoCal

by Smith, Wayne

I am certainly with you on that, Marvin. I have exhibited at 8 or 9 VCFs (my first was VCF 3) and was on the mailing list as recently as August 2023 (but apparently no more) and only happened to see the event being discussed in this forum. Thanks to Wayne Sudol for posting the information. Odd that a VCF finally comes to my home turf and this is the one I only find out about two weeks in advance! -----Original Message----- Date: Fri, 2 Feb 2024 11:54:03 -0800 From: Marvin Johnston <marvin(a)west.net> Subject: [cctalk] Re: VCF SoCal To: cctalk(a)classiccmp.org Message-ID: <3d8c71e2-1730-51ca-88ef-6e87187f14a7(a)west.net> Content-Type: text/plain; charset=UTF-8; format=flowed Note to those people too lazy to update their subject line... it is REALLY getting tiresome looking for information about the SoCal VCF and finding not one post giving any information about it let alone the multitude of posts seemingly with the subject line "VCF SoCal"!!! Sheesh!!! Kind of makes search totally (almost) useless. I'm still not sure of the date(s) or location except that it is in February somewhere in southern Orange County, CA USA.

1 year, 2 months

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Kennett Classic Workshop Tomorrow

by Bill Degnan

Just a reminder that out vintage computing workshop is tomorrow, all day and into the evening. Kennett Square, PA 9AM - 8PM For more details: https://www.kennettclassic.com/hack-a-thon-workshop-february-17th/ Bill

1 year, 2 months

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Repair Workshop/Hack-a-thon in Kennett Square, PA Sat., Feb. 17, 2024

by Jeffrey Brace

The Vintage Computer Federation and Kennett Classic will be doing a joint repair workshop/hack-a-thon Sat. Feb. 17, 2024. Hours: 9AM to 8PM. Signup here if you are interested: https://www.kennettclassic.com/hack-a-thon-workshop-february-17th/ <https://www.kennettclassic.com/hack-a-thon-workshop-february-17th/> Take care! Jeff Brace VCF National Board Member Chairman & Vice President Vintage Computer Festival East Showrunner VCF Mid-Atlantic Event Manager Vintage Computer Federation is a 501c3 charity https://vcfed.org/ <http://www.vcfed.org/> jeffrey(a)vcfed.org

1 year, 2 months

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Re: NRAO Data tapes

by Mark Kahrs

The LSSM is getting into the Modcomp world, so we are very interested in the disposition of this media. The OS tapes would be particularly valuable.

1 year, 2 months

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VCF SoCal Saturday

by Bill Gunshannon

On 2/9/2024 5:08 AM, Steve Lewis via cctalk wrote: > There's a good chance I'll make it to the upcoming VCF SoCal coming up on > Sat. the 17th. > > Some things I'm looking for: > - recently an associate of mine gifted me their original 1978 TRS-80 (Model > 1). But not much in accessories. I have a suitable tape deck, but other > accessories might be nice. His father used this particular unit while he > worked in the Tandy Towers in downtown FW (that's all I know about it so > far). > Checkout the MISE and MIRE from Bartlett Labs and the FreHD from Ian Mavric. bill

1 year, 2 months

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VCF SoCal Saturday

by Steve Lewis

There's a good chance I'll make it to the upcoming VCF SoCal coming up on Sat. the 17th. Some things I'm looking for: - recently an associate of mine gifted me their original 1978 TRS-80 (Model 1). But not much in accessories. I have a suitable tape deck, but other accessories might be nice. His father used this particular unit while he worked in the Tandy Towers in downtown FW (that's all I know about it so far). - any IBM 5100/5110 parts (including 8" disks); an associate here in Texas has gotten their IBM 5114 disk drive unit working, so we'd be interested in maybe copying disk files over to QIC tapes, and then somehow off-system to archive. And I'm still looking for a copy of "PC51" (a 5110 BASIC emulator that ran under MS-DOS 2.0), it was by CORE NET. Probably at most only a few hundred customers bought it (at its $3000 price tag) around 1983. - any parts for a Sharp PC-5000. Mine works, but I've been looking for a Sharp CE-510F floppy disk drive (that has a "special" 37-pin connector that makes it only work with some of the Sharp models - and I've verified it is not the same as the 37-pin connector used on the IBM PC 5150 controller card). - anyone who can replace the screen on an Atari Lynx. I have the parts, just don't have the talent :) - a ThinkPad 385CD. I have one and it's in really decent condition, but thinking I'd like to have a spare. Nice thing about the 385CD is it has both 3.5" floppy and CD-ROM. [ I'm specifically looking for 486DX or Pentium, so mid-1990s, not late 1990s - I have plenty of Pentium 3's and onward; going for a "period correct" OS/2 Warp setup, even though I do have ArcaOS on some 2001-era systems ] - I guess while I'm at it, I've also been seeking for a working Datapoint 2200 (or equivalent variant, any 1974 or earlier) or Wang 2200. Even just seeing either of those in working condition would be neat (working in terms of still booting to BASIC). I was surprised I didn't see one at VCF in Dallas last year (but they did have a HP9830 and Tek4051, those were neat to see and still working).. The Wang systems have some decent emulators, but I don't recall emulators for the early Datapoints.- so I've been curious about their font and if it was as good at the brochures show. I've read that the thing that really got Datapoint some money (initially) was they pulled off crisp 80-column early on (and from the IBM SCAMP journals, I read that even IBM struggled to do 80 cols - part of why the IBM 5100 was only 64-column). I just happen to be near LA that weekend, so hopefully it works out that I can get to this VCF event. Is it the first time being held in that area? Cheers, hope weather all works out for this event! -Steve

1 year, 2 months

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Oscar's PiDP 10 parts arrived in Panama today

by jim stephens

Just saw on Twitter that the parts (main ones being front panel castings) arrived, he's going to start kitting and sending to a fulfifllment center in Florida. I'm sure the audience here knows this, but this puts as marker in the record here, since it's been ongoing for 3 years (according to Oscar). Now to figure out how to get one. thanks jim

1 year, 2 months

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Re: Vmebus

by Wouter de Waal

> >Anyone have a VMEbus system they use at least occasionally? If so, what >make/model/config? I still use a couple of PPC VME boards (DY4 / Curtiss Wright 182/183/184, both Conduction-Cooled and Air-Cooled) to test the tail end of hardware that we are still shipping (by now EOL and basically NOS). But it's work, I don't find them interesting. If someone here has the warm fuzzies for PPC VME, we can talk :-) W

1 year, 2 months

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vt220 firmware source?

by Fritz Mueller

Hi folks, I’m working on a vt220 debug/repair and have gotten to the point where I need to trace firmware execution at boot. I’ve managed to dump the proms (close to but slightly different from the versions in Lars’ GitHub) and the 8051 internal rom, and can load and disassemble these with the s51 simulator. I also have an HP 1660 logic analyzer successfully configured and clipped up to capture instruction traces. I’m about to dive in to commenting the disassembly listings, but figured I’d ping here to see if anybody might have done this already in case I wouldn’t have to start from scratch? thanks much, —FritzM.

1 year, 2 months

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Re: VCF SoCal

by Marvin Johnston

Note to those people too lazy to update their subject line... it is REALLY getting tiresome looking for information about the SoCal VCF and finding not one post giving any information about it let alone the multitude of posts seemingly with the subject line "VCF SoCal"!!! Sheesh!!! Kind of makes search totally (almost) useless. I'm still not sure of the date(s) or location except that it is in February somewhere in southern Orange County, CA USA.

1 year, 2 months

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Northstar - odd abuse of 5.25" hard sector floppy disks

by r.stricklin

I recently acquired a stash of 5.25” Northstar-related floppy disks. About half are soft sector for the Northstar Dimension, the other half are 10 sector for the Advantage 8/16. There are, however, about a dozen 10 sector floppies all modified in the same curious way: they have had a write protect sticker stuck over the index hole. Some with the sticker on top, some on bottom; can’t think of any reason that would matter as blocked is blocked. But I’ll mention it. They seem to have something to do with the Dimension, maybe, as a couple of them are marked with NetWare 1.1.1 related labels (all handwritten). There is a set of what appears to be WordPerfect install floppies (though they don’t say WordPerfect specifically) . A couple also mention the odd term “smutched”. One is actually labeled “smutch.exe”. Tim Mann’s Catweasel tool (cw2dmk) was unable to find any valid sectors on them, using the option to ignore the index pulse. I am aware that some drives won’t enable data if the pulse is missing entirely but I used a drive that doesn’t care (Teac FD-55BR - I have used it to read unpunched “flippy” disks) and still got nothing. Does the Dimension really not need the index pulse, despite otherwise using an apparently standard WD-style format? Is something else going on? Does any of this ring any bells with the collected wisdom of the list? What am I likely dealing with here, if I want to recover the contents of these disks? Thanks. ok bear.

1 year, 2 months

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Re: Qume 842 8" Disk Drive Question

by Wouter de Waal

> >The drive works perfectly for double sided disks (using the >appropriate index hole). Yea, 8" drives are a bit funny like that. You know this, because context. Some future google-ologist might not. So. 8" drives have a different index position for SS and DS. In your case I suspect either the emitter LED or the receiver phototransistor ro maybe the wiring or what ever conditioning on the PCB is b0rken for the SS sensor. Assuming of course your drive has two sensors -- I have not yet owned an 8" drive like that, the ones I have had were dedicated SS or DS. W

1 year, 2 months

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WTB: x68000 keyboard and mouse

by Ethan O'Toole

USA here, anyone have a Sharp x68000 keyboard and mouse to sell? The one that I've repaired and am trying to complete is the desktop version, black, mini-din connector. -- : Ethan O'Toole

1 year, 2 months

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Re: VCF SoCal

by Wouter de Waal

>I have found that computers are much like motorcycles: many of the >most interesting were never available in the US. Computers are much like motorcycles: many of the most interesting ones were TERRIBLE! W

1 year, 2 months

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Re: VCF SoCal

by Bill Gunshannon

On 1/31/2024 8:30 PM, mark audacity romberg via cctalk wrote: > I suppose I should’ve specified “of the versions of BASIC I’ve ever heard anyone talk about still using this century.” :P Basic09 is probably still in use on OS9000. VAX BASIC is still in use on VMS ALPHA and Itanium and is about to be released for the recent port of VMS to x86-64. I personally know of a number of rather large production systems in VMS BASIC. RSTS/E is harder to say. There are still a large number of PDP-11 sites running using both real hardware and commercial emulator systems but which OSes they are using I can't say. Could be all RT-11 and RSX-11. But then, BASIC-PLUS and BASIC-PLUS2 both run on RSX-11 as well. I just don't have much experience with RSX-11 as I never really liked it. And none of this takes into account hobbyists like me who use all of them. bill

1 year, 2 months

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Vmebus

by Bill Degnan

Anyone have a VMEbus system they use at least occasionally? If so, what make/model/config? Bill

1 year, 2 months

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NEC APC external floppy drivers needed

by Just Kant

I don't even have an APC anymore. But since this thing is eyeing me menacingly I figured I'd put the request out. Butler Flats Associates dual external 5 1/4" accoutrement, has it's own controller card (based on wd1771/1772 iirc). Contact me off list if you have these. Much appreciated. Sent with [Proton Mail](https://proton.me/) secure email.

1 year, 2 months

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ADM3a screen rot.

by William Sudbrink

A quick note on ADM3a screen rot... my vintage collection resides in a cool (60-72 degrees F) dry basement. My "pride and joy" ADM3a (I have several) was just starting to show a few bubbles at the corners last September. I was pulling out some parts units on Friday and noticed that one had a much better screen than I remembered. Thinking that I might swap screens, I took a close look at "PnJ" and discovered to my horror that most of the lower half of the screen had "melted". "PnJ" was on a shelf, below eye level, nowhere near a vent or other source of heat. I was so annoyed that I immediately started cleaning/repair without taking any pictures (sorry). Fortunately, there does not appear to be any corrosion from the "goo". I completely desoldered and removed the keyboard assembly to get all of the crud out of (and out from under) it. The mainboard is a fully socketed example and the crud is down in several of the sockets. I'm still working on that. Anyway, the take away is don't assume (like I did) that the ruined ADM3as you see are the result of temperature extremes. It can happen anywhere. Keep a close eye on yours if you have one. Bill S. -- This email has been checked for viruses by Avast antivirus software. www.avast.com

1 year, 2 months

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11/15, 11/20 systems and parts, more

by Paul Anderson

I am working on a deal which includes several PDP11/15 or 20s. I will be looking at them next week and hope to get more details. I will look for exact model numbers and configuration.At least 2 of them have non DEC silkscreens on the front panel. Also a selection of 11/05 and 11/10 including 5 1/4 box, BA11-D, and BA11-K units. If you are interested in a box or parts please email me off list. Thanks, Paul

1 year, 2 months

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The MAC at 40

by Murray McCullough

The Apple Mac, 40 years old, came from Xerox PARC’s GUI and Apple’s LISA. Not sure that it really changed computing though! Financially it didn't help Apple until after 1997 and Gate's investment. Happy computing! Murray 🙂

1 year, 2 months

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Looking for 1970s OAK keyboard switches...

by John Robertson

I've been hunting for a while now for OAK PCB mount keyboard switches that I can't find a part number for. I've attached a product listing for the switch that shows it pretty well. DPST-NO preferred. Only $0.40 in the early '70s! Any quantity considered... Thanks! John :-#)# -- John's Jukes Ltd. 7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 Call (604)872-5757 (Pinballs, Jukes, Video Games) flippers.com "Old pinballers never die, they just flip out"

1 year, 3 months

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IBM 38 on Facebook Marketplace

by Anders Nelson

I know nothing of what they're referring to, but just in case someone is interested: https://www.facebook.com/marketplace/item/1033559851065048 -- Anders Nelson www.andersknelson.com

1 year, 3 months

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WTB: Keyboard for IBM 3290-1 terminal.

by Andrew Back

Hello, I'm looking for a keyboard to use with an IBM 3290-1 terminal (DB25 connector). IBM part number 6016730 or similar. Regards, Andrew

1 year, 3 months

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Re: Can anyone (pref in USA) recover data from an old RK05 disk pack?

by Graham Toal

On Tue, Jan 23, 2024 at 3:05 PM Wayne S <wayne.sudol(a)hotmail.com> wrote: > Can’t the pack be read and copied on the system it’s currently on? > It's not been near a computer since 1979. It's currently in Fred van Kempen's storage. Graham

1 year, 3 months

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Can anyone (pref in USA) recover data from an old RK05 disk pack?

by Graham Toal

In 1979, the Dutch team of Harry Whitfield's students writing the Groningen University Time Sharing O/S called GUTS sent an RK05 to Edinburgh for us to try out on a PDP11/60 we had access to in Steven Salter's Wavepower project lab. Ian Young spun it up and learned how to use it. After some years of being out on loan, we hope to have the disk pack returned to us this year, so I'm now looking for someone reliable who can recover very old disk packs, preferably in the USA where we can ship the pack to them, without having to go through customs and risk damage in an inspection (I remember those scary 1970's diagrams showing the comparative size of a smoke particle next to the gap between the heads and the disk surface!). To minimize the risk of damage during shipping, I'm hoping that the person who currently has it can ship it directly to whomever we can find who can read it for us, rather than to me and then to that person. I'll be happy with a raw disk read, but the GUTS file format should be backwards compatible with RT11 files so if the disk is readable I don't think we'll have trouble getting the data off, especially if the person with a pdp11 runs RT11 on it. If we can get a disk image however I think we could get it running again under emulation. Please contact me at gtoal(a)gtoal.com if you know of anyone in the US who might be able to read this disk pack, or contact them and ask them to contact me if they're interested. Thanks, Graham <gtoal(a)gtoal.com> PS We have the 3 GUTS manuals in pdf format, but that's the only GUTS documentation that we know of which survived: https://gtoal.com/history.dcs.ed.ac.uk/archive/scans/guts/red.pdf https://gtoal.com/history.dcs.ed.ac.uk/archive/scans/guts/orange.pdf https://gtoal.com/history.dcs.ed.ac.uk/archive/scans/guts/yellow.pdf

1 year, 3 months

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FASTBACK Help how to recover files stored in this backup format,?

by ED SHARPE

FASTBACK bak up ptogrsm...Help how to recover files stored in this backup format,? Back when the museum was next to computer exchange Inc. Pre '94. We put out a journal once a year Over 100 pages tightly leaded would like to access files and reprint. Would need Pagemaker 3 orveoukd data files be upward compatible with indesign by adob? Thanks Ed Sharpe archivist for SMECC MUSEUM PROJECT Glendale AZ Sent from AOL on Android

1 year, 3 months

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Re: Forth on the HP 3000: Alternate History

by Paul Koning

> On Jan 19, 2024, at 10:34 PM, Rodney Brown <rdbrown0au(a)gmail.com> wrote: > ... > > I'm not a polymath who keeps lots of Assembly mnemonics in my head, so I hoped the "IEEE Standard for Microprocessor Assembly Language" IEEE Std 694-1985 1985 doi:10.1109/IEEESTD.1985.81632 would have taken off. I think only the Motorola 88000 used it and C probably was far more prevalent. I think the HPPA 1.1 then started the trend of SIMD instructions, so the portability would have reduced. I had never heard of that IEEE standard, and it doesn't seem to have gone anywhere. Which makes sense; assemblers represent the architectural choices of the hardware, so standardizing them is a strange notion. You could standardize a style of construction (making it sort of a "meta-standard") but that isn't very interesting. The general style of opcode and operands had been the predominant style by then, and for a long time before. Other styles, like CDC 6000 Compass (CPU side) or stranger examples seen on Electrologica, haven't been used in ages. About the only style issue that would be nice to have consistent is ordering: does destination come first, as with ARM and IBM 360, or source first as with PDP-11 and VAX? Then again, I suppose that's just about as hard a problem as byte order. paul

1 year, 3 months

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Forth on the HP 3000: Alternate History

by Rodney Brown

Forth was ported to an HP-2100 in 1972, by Elizabeth Rather, so had early history on HP hardware, though from what I can it it was never a product available from HP. I don't know if Forth Inc ever supported Forth on HP machines. Anthony Pepin provided a Forth to the HP3000 Contributed Library in September 1982, though I think his looks like a virtual machine, I don't remember trying it in the day. Thanks to Gavin Scott's "system" and J. David Bryan's SIMH HP-3000 emulator, I can look at it now. As Anthony Pepin observed, Forth implementations at the time assumed a von Neumann architecture. The HP 3000 with a Harvard architecture implying read-only code with a different address space, needs more thought. Why Forth? I've never been a Forth programmer, but as I understand it, compilers/interpreters weren't standard with HP 3000 Systems, nor were there scripting languages like awk, sed & perhaps the Bourne shell on Unix. A Forth interpreter supporting the HP 3000's supported types & the mathematical functions in SL.PUB.SYS (the system shared library), even without compilation, would have been bettered by the Unix dc (RPN calculator) only for it's multi-precision maths. HP 3000 types (using kludged C <stdint.h> style int16_t => INTEGER, uint16_t => LOGICAL, int32_t => DOUBLE f32_hp3k_t = REAL, f48_hp3k_t => LONG REAL COMPLEX & Packed Decimal? A Forth supporting code compiled to Data space would have been a useful tool for learning & testing & perhaps as a scripting language. With Date & Actuarial procedures added, I suspect our Actuarial students would have found it useful. Don't know if it would have been seen as useful at educational institutions like RMIT here in Melbourne, Australia that had 3000s. Assemblers in Forth seem to be a common thing, it would be possible to assemble the Data space code with minor peephole optimization, and the necessary translation from modifying the Next Data instruction variable to branches in the code. That and the Dictionary entry could then be written out as an input file for PATCH.PUB.SYS, allowing the interpreter to be extended without understanding the USL format. I've finally read some of Koopman, Philip (1989) "Stack Computers: The New Wave" looked a little at his Harris RTX-2000 MS-DOS Emulator source, and at James Bowman "J1: a small Forth CPU Core for FPGAs". Like the HP 3000, the Harris RTX-20[01]0 & the J1 are 16-bit machines with a 16-bit instruction width (soley for the Harris & J1). Other than the HP 3000, the architecture use the sign bit to use the instruction value as a call-target address or decode an ALU operation with some Forth special sauce. I've wondered for a while whether the HP 3000 XEQ instruction which executes a stack adressable 16-bit word (0..15 deep on the Stack-Up stack (S register)) has been used for anything other than exiting to clean up the stack on a Ctl-Y trap. A virtual Forth machine where negative int16_t values give a negated call address, with the least-significant bit selecting Code or Data. Almost all 16-bit HP 3000 instructions are positive. Below is an SPL sketch of the virtual machine interpreter Nonsense @ characters are *Fix Me*s equate Deepest = 15, Dict'Sz = 1024, Padded'Dict'Sz = Dict'Sz + 16; integer X = X; logical PB'Address; << Poor Name>> logical bu'S'15; pointer restore'S'15; logical S'15 = S - 15; logical D'Dict'Used := 0; logical Code'Offset; label Next'Word, Execute'TOS, ... integer array D'Dict(Padded'Dict'Sz); << Code must immediately follow, need to access padding perhaps >> Next'Word: TOS := D'Dict(Code'Offset); if < then begin << Call (int16_t < 0) >> Return'Stack'X := Return'Stack'X + 1; Return'Stack(Return'Stack'X) := -((Code'Offset + 1) & LSL(1))); assemble(NEG, DUP); if TOS then begin << Odd => PB (Code) address >> PB'Address := TOS & LSR(1); Assemble (@); << Indirect Jump through PB'Address Variable >> else begin << Even Data Address >> TOS := TOS & LSR(1); assemble(DUP); if TOS >= D'Dict'Used then begin Error(@); end else begin Code'Offset := TOS; << Weak bounds check >> goto Next'Word; end; end else begin << (int16_t >= 0), HP-3000 16-bit instruction >> Execute'TOS: bu'S'15 := S'15; << Needs testing, backup the value >> @restore'S'15 := @S'15; << Save Data address of stack element >> S'15 := TOS; << Save the instruction as deep as possible >> assemble(XEQ 14); << Needs testing probably wrong depth number >> << Execute the instruction just deposited >> restore'S'15 := bu'S'15; Code'Offset := Code'Offset + 1; goto Next'Word; end; << Not sure how to handle end of the Forth code in Data Could call to a PB (Code) address or do an indirect branch through a procedure local to the handle code. So in data, a sentinal of sorts>> << Have Execute'TOS as a label for flexibily >> << Basically, Search the DB (Data) Forth dictionary, if found interpret the data code, otherwise search the PB (Code) Forth dictionary, if found jump to and execute the the code directly. >> <<Restoring & Saving the Status register around each XEQ instruction use, would be better as a teaching tool & allow using Condition Code effects when the Forth word is compiled to Code space. >> -- The output from BUILDINT.PUB.SYS over a copy of SPLINTR.PUB.SYS gives the type signatures of the System Intrinsics and compiler library routines. This could be curated & processed to generate shims for calling from the Forth interpreter, though the Option Variable Procedures would take some thought. There seem to be ~600 declarations, some of which are duplicate entry points for the Fortran compiler library for REAL & LONG REAL functions. (ie RAND & RAND' etc), so you'd need 3 or more code segments to get around ~256 STT (Segment Transfer Table) limit to call everything. Virtual Stack machines executing directly on the HP 3000 stack was what our COCAM language did. Comments? Were HP doing anything like this in the labs? Philip Koopman's Stack page at CMU http://users.ece.cmu.edu/~koopman/stack.html

1 year, 3 months

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The Sinclair QL's legacy at 40

by Liam Proven

My 1st contribution to the Register's "retro tech week" may amuse... https://www.theregister.com/2024/01/16/ql_legacy_at_40/ -- Liam Proven ~ Profile: https://about.me/liamproven Email: lproven(a)cix.co.uk ~ gMail/gTalk/FB: lproven(a)gmail.com Twitter/LinkedIn: lproven ~ Skype: liamproven IoM: (+44) 7624 277612: UK: (+44) 7939-087884 Czech [+ WhatsApp/Telegram/Signal]: (+420) 702-829-053

1 year, 3 months

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Re: WWVB

by Robert Feldman

>Message: 17 >Date: Mon, 15 Jan 2024 12:52:15 -0500 >From: Bill Gunshannon <bill.gunshannon(a)hotmail.com> >Subject: [cctalk] Re: WWVB >To: cctalk(a)classiccmp.org >Message-ID: <SA1PR17MB5737C194F181927517114C55ED6C2(a)SA1PR17MB5737.nam prd17.prod.outlook.com> >Content-Type: text/plain; charset=UTF-8; format=flowed > >On 1/15/2024 10:47 AM, Chris Elmquist via cctalk wrote: >> On Sunday (01/14/2024 at 09:55PM -0600), Chris Elmquist via cctalk wrote: >>> There are a number of WWVB simulator projects out there that will transmit a weak but usable signal to your clock after getting sync’d from ntp or GPS NMEA time messages. They were developed to help people develop receivers :-) One in particular uses an AVR and it should be pretty simple to make it do the “old protocol”. You’d then hide this behind your clock and it will sync to it instead of the actual WWVB signal. Solves the protocol problem and the weak signal problem from real WWVB with one little circuit. >>> >>> If Google does not provide, I can dig up some links tomorrow. >> >> Hmm. Strange. I did follow-up shortly after the above post with this >> link, >> >> https://www.instructables.com/WWVB-Simulator/ >> >> but I don't see that that made it to the list. >> >> Chris >> > >It did. I got it. > >bill Your original email with the link did not make it into the digest, which is what I receive. Chirs, Did you also send it directly to Bill. Perhaps that is what he got. Bob

1 year, 3 months

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WWVB

by Bill Gunshannon

This is kind computer related but maybe more ham radio related but I figure if anywhere, here is the place to find an answer. I have a SkyScan ATOMIC CLOCK. It is supposed to get its time from WWVB. The antenna icon that is supposed to mean it is receiving WWVB is on. Your probably wondering why I keep saying "supposed to". The clock is always wrong. Slow by about 2 minutes. Is there a known problem with WWVB? bill

1 year, 3 months

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Shugart 850/851 repair needed

by Tim Mann

Hi folks -- long time no post. I'm wondering if there's anyone who would be interested in trying to fix my Shugart 850/851 8-inch floppy drive. It was new old stock when I bought it, and hasn't been used much, but last time I tried it, it would no longer read any data from the back of a floppy, only from the front. I use it with a Catweasel and my cw2dmk software, so I was able to try a few experiments from the software side. What I see is just plain noise coming out on the data line when reading the back. It's possible of course that some unobtainium chip has gone bad, so I don't expect much. But it would be nice if someone with more electronics skill than me, and more knowledge about these drives in particular, would be willing to take a look at it. The drive is of course big and tough to ship, so it probably only makes sense for someone within driving distance (I can drive it over or you can come by), which means being in the SF Bay area. I live in Palo Alto right near downtown. FWIW, the drive and a power supply are mounted in a case that I made by ripping the guts out of a surplus desktop PC case. The power supply seems fine and the drive can read the front of disks fine. Thanks for any help, Tim

1 year, 3 months

2
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WTB: ASTEC BM200-3601 (PSU for HP workstation)

by Jan-Benedict Glaw

Hi! Due to a broken water line, I ended up with a blown BM200-3601 power supply in a HP workstation. These seem to be notoriously failing due to bad caps, but mine was fine until flooded. Found few offers in the USA (~ 1400 US-$), but adding taxes and shipping to Germany, that would probably end at around 2000 €. That's well beyond what I'd be willing to spend on it. :( Thanks, Jan-Benedict --

1 year, 3 months

1
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VCF East 2024 Hotel Blocks

by Jeffrey Brace

For those needing a decent price on hotels, check out the hotel blocks page: https://vcfed.org/vcf-east-hotel-blocks/ Thanks! Jeff Brace VCF National Board Member Chairman & Vice President Vintage Computer Festival East Showrunner VCF Mid-Atlantic Event Manager Vintage Computer Federation is a 501c3 charity https://vcfed.org/ <http://www.vcfed.org/> jeffrey(a)vcfed.org

1 year, 3 months

1
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FYI: Hobbes OS/2 Archive logs off permanently in April

by Robert Feldman

From The Register: Bad news for OS/2 fans: the Hobbes OS/2 software archive is to be shuttered once and for all in April. The Hobbes OS/2 Archive<https://hobbes.nmsu.edu/>, run as a service by the Department of Information & Communication Technologies at the US New Mexico State University, has announced its impending demise. As of April 15, the site will no longer exist. According to a warning on the site: "After many years of service, hobbes.nmsu.edu will be decommissioned and will no longer be available. You the user are responsible for downloading any of the files found in this archive if you want them. These files will no longer be available for access or download as of the decommission date." https://www.theregister.com/2024/01/10/hobbes_os2_archive_shut_down/ [https://regmedia.co.uk/2023/12/20/shutterstock_switchoff.jpg]<https://www.theregister.com/2024/01/10/hobbes_os2_archive_shut_down/> The Hobbes OS/2 Archive logs off permanently in April<https://www.theregister.com/2024/01/10/hobbes_os2_archive_shut_down/> Fans of the tech dinosaur have a few months to fill their drives with software www.theregister.com

1 year, 3 months

4
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Re: FYI: Hobbes OS/2 Archive logs off permanently in April

by Ali

Does archive.org have an up to date mirror? -Ali

1 year, 3 months

1
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Re: Computhink Eagle 32 - software, docs, info?

by Wouter de Waal

Hi all Oops that went off before I was finished with it. >I suspect that I can figure out from the pattern of I/O accesses >which devices are at which address in the memory map, at least if I >bring up an emulation in MAME. That should at least allow writing >new code for it, and _maybe_ even figuring out which CRT controller >the video hardware uses and where in the memory map it is. (I >suspect the 6845 and/or 6847 just from the time period, but who >knows? Gotta see what it actually do when trying to show the âIPL >IN PROGRESSâ string contained in the ROM, or one of the couple >error strings) As far as I can tell this is where a character gets displayed. ; character in +1(A6) 00FFCE0C : 48E7 C000 MOVEM.L D0,D1,-(A7) 00FFCE10 : 302B 06AC MOVE.W +1708(A3),D0 ; get something 00FFCE14 : 6122 BSR $00FFCE38 ; do something 00FFCE16 : 0040 8000 ORI.W #$8000,D0 00FFCE1A : 11C0 8001 MOVE.B D0,$00FF8001 ; Low byte 00FFCE1E : E048 LSR.W #8,D0 00FFCE20 : 11C0 8003 MOVE.B D0,$00FF8003 ; High byte 00FFCE24 : 11EE 0001 8005 MOVE.B +1(A6),$00FF8005 ; Character 00FFCE2A : 0838 0006 801B BTST #6,$00FF801B ; Wait for a flag 00FFCE30 : 66F8 BNE $00FFCE2A 00FFCE32 : 4CDF 0003 MOVEM.L (A7)+,D0,D1 00FFCE36 : 4E75 RTS ; Here with something (from $06AC(A3)) in D0 ; current guess, it's the cursor position, which then gets translated ; to an X and a Y byte in D0.w 00FFCE38 : 0C2B 0050 06B7 CMPI.B #$50,+1719(A3) 00FFCE3E : 6628 BNE $00FFCE68 ; Return 00FFCE40 : 48C0 EXT.L D0 00FFCE42 : 81FC 0050 DIVS #$0050,D0 00FFCE46 : 4840 SWAP D0 00FFCE48 : 3200 MOVE.W D0,D1 00FFCE4A : 4840 SWAP D0 00FFCE4C : ED48 LSL.W #6,D0 00FFCE4E : 0C01 0040 CMPI.B #$40,D1 00FFCE52 : 6C08 BGE $00FFCE5C 00FFCE54 : 11FC 0000 8013 MOVE.B #$00,$00FF8013 00FFCE5A : 600A BRA $00FFCE66 00FFCE5C : 0441 0040 SUBI.W #$0040,D1 00FFCE60 : 11FC 0001 8013 MOVE.B #$01,$00FF8013 00FFCE66 : 8041 OR.W D1,D0 00FFCE68 : 4E75 RTS Or maybe it's talking to a chip (not 6845 which is memory mapped or 7220 which has two registers only) and someone recognises it? W

1 year, 3 months

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Re: Computhink Eagle 32 - software, docs, info?

by Wouter de Waal

Hi all Chris gave me a copy of the boot ROM and I played around with it a bit. >I threw the 4KB of boot ROM in Ghidra and confirmed a couple things: > >- At boot, ROM is mapped to 0, and then remapped either by a write >to the location or by a cycle counter: The initial stack pointer at >0x0 is 0x0001fffe and the initial program counter at 0x4 is >0x00ffc026, indicating the ROM is normally located at 0x00ffc000. >- The ROM freely interchanges addresses in the >0x00ffc000..0x00ffffff range and addresses in the >0xffffc000..0xffffffff range, which is annoying to deal with in Ghidra. The code takes advantage of the 68000 sign-extend on absolute short addressing mode, like move.b #$00, $8011. IDA correctly disassembles this to "move.b #0,($FF8011).w". I assume Ghidra if sign-extending it all the way to FFFF8011? >- I/O devices appear to be in the 0x00ff8000..0x00ffbfff range, all >of the devices accessed via the bootstrap seem to be barely above 0x00ff8000. >- Only NMI, bus error, interrupt 2, and interrupt 5 are set up by >the bootstrap. Yup. >- The bootstrap is very bare-bones but still has a bunch of >indirection in it; itâs obviously written in assembly, but it does >seem to have parameterization so it may support both console and serial I/O. I suspect either some low-level high-level language, or massive use of macros (which is in effect a low-level high-level language :-) Code like: ; Called with A6 pointing to a length and a string address 00FFCA4C : 48E7 8080 MOVEM.L D0,A0,-(A7) 00FFCA50 : 3016 MOVE.W (A6),D0 ; length 00FFCA52 : 48C0 EXT.L D0 00FFCA54 : 206E 0002 MOVEA.L +2(A6),A0 ; pointer to string 00FFCA58 : 508E ADDQ.L #8,A6 ; clear stack 00FFCA5A : 5380 SUBQ.L #1,D0 00FFCA5C : 6B0E BMI $00FFCA6C ; done 00FFCA5E : 518E SUBQ.L #8,A6 ; make space on stack again 00FFCA60 : 1D58 0001 MOVE.B (A0)+,+1(A6) ; one character on stack 00FFCA64 : 4EB8 C566 JSR $00FFC566 00FFCA68 : 51C8 FFF4 DBF D0,$00FFCA5E ; loop 00FFCA6C : 4CDF 0101 MOVEM.L (A7)+,D0,A0 00FFCA70 : 4E75 RTS >I suspect that I can figure out from the pattern of I/O accesses >which devices are at which address in the memory map, at least if I >bring up an emulation in MAME. That should at least allow writing >new code for it, and _maybe_ even figuring out which CRT controller >the video hardware uses and where in the memory map it is. (I >suspect the 6845 and/or 6847 just from the time period, but who >knows? Gotta see what it actually do when trying to show the âIPL >IN PROGRESSâ string contained in the ROM, or one of the couple >error strings) > Chris

1 year, 3 months

1
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Looking for a DG manual

by Peter Ekstrom

Hello, Does anyone have a PDF of the AOS/VS Systems internals reference manual by chance? Thanks, Peter

1 year, 3 months

2
1
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More ALGOL-68

by Mark Kahrs

I remember circa 1977 CMU had a PDP-11 compiler for '68 with an extensive runtime component. I presume the sources are lost. Peter Hibbard was the guy responsible if I recall.

1 year, 3 months

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Re: More ALGOL-68

by Paul McJones

> On Jan 6, 2024,Mark Kahrs <mark.kahrs(a)gmail.com <mailto:mark.kahrs@gmail.com>> wrote: > > I remember circa 1977 CMU had a PDP-11 compiler for '68 with an extensive > runtime component. > I presume the sources are lost. > > Peter Hibbard was the guy responsible if I recall. Yes, Peter was the author, and he also sponsored a corresponding ALGOL68 subset. My “history of Algol” web site has information here: https://www.softwarepreservation.org/projects/ALGOL/algol68impl/#ALGOL_68S In particular, there is a snapshot with binaries and some assembler files here: https://www.tuhs.org/Archive/Applications/Algol_68/ <https://www.tuhs.org/Archive/Applications/Algol_68/> and a later rewrite by C. H. Lindsey in the Amsterdam Compiler Kit here: https://github.com/davidgiven/ack/tree/default/lang/a68s https://www.clerew.man.ac.uk/#ALGOL%2068 See my web site cited above for additional information, papers, and documentation. Paul

1 year, 3 months

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86-DOS disks...

by geneb

For those interested, I've imaged a couple of super rare (actually rare, not "ebay" rare) original 86-DOS disks. https://archive.org/details/86-dos-version-0.1-c-serial-11-original-disk https://archive.org/details/86-dos-version-0.34-c-serial-221-original-disk Both will boot under simh. g. -- Proud owner of F-15C 80-0007 http://www.f15sim.com - The only one of its kind. http://www.diy-cockpits.org/coll - Go Collimated or Go Home. Some people collect things for a hobby. Geeks collect hobbies. ScarletDME - The red hot Data Management Environment A Multi-Value database for the masses, not the classes. http://scarlet.deltasoft.com - Get it _today_!

1 year, 3 months

3
2
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Anyone have a D1 deck?

by Jim Brain

https://entertainment.slashdot.org/story/23/12/30/0151241/documentarians-se… -- Jim Brain brain(a)jbrain.com www.jbrain.com

1 year, 3 months

9
10
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RIP: Software design pioneer and Pascal creator Niklaus Wirth

by Liam Proven

Evangelist of lean software and devisor of 9 programming languages and an OS was 89 https://www.theregister.com/2024/01/04/niklaus_wirth_obituary/ The great man has left us. I wrote an obituary. -- Liam Proven ~ Profile: https://about.me/liamproven Email: lproven(a)cix.co.uk ~ gMail/gTalk/FB: lproven(a)gmail.com Twitter/LinkedIn: lproven ~ Skype: liamproven IoM: (+44) 7624 277612: UK: (+44) 7939-087884 Czech [+ WhatsApp/Telegram/Signal]: (+420) 702-829-053

1 year, 3 months

14
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IBM 5110 IMFs

by Christian Corti

Does anyone here has an actual IMF file (Internal Machine Fix) for the IBM 5110? Not the file called "IMF" on the Customer Support Functions disk/tape, but a real fix. File type should be 23. I am trying to figure out how the patch mechanism works. The IMF is supposed to be loaded with the LOADER utility. Christian

1 year, 3 months

1
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Re: Computhink Eagle 32 - software, docs, info?

by Wouter de Waal

Hi Chris and all >- No video board, whether text or graphics > >Since thereâs no video board in the system, and a couple of cables >internally that arenât attached to anything, I expect it was >removed by a previous caretaker. This is sad because without one >itâs unlikely to come up, not that anyone has found any software >for it. On the other hand, there are zero PALs, so both full reverse >engineering and maintenance should be straightforward. I've scanned the press releases and adverts that come up on Google and I'm going to wager it was meant to be used with one or two terminals. Nowhere do they mention a display, and the adverts show a box sitting next to a terminal. Send me a copy of the ROM binary please? W

1 year, 3 months

1
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VAX 4000-200 in BA215 chassis. Can I install a KFQSA card and connect the cabinet disks to it?

by thomasdzubin＠gmail.com

I have a couple of VAX 4000-200 boxen running OpenVMS. I want to try out NetBSD on them but NetBSD does not support the SHAC DSSI controller on the KA660 CPU card. However NetBSD *DOES* support the KFQSA DSSI controller which I have a few of in my VAX 3800s. Can I install the KFQSA card in my 4000-200, disconnect the internal disks from the SHAC and connect the disks to the KFQSA thereby allowing NetBSD to run? Has anyone done anything like that? Happy 2024 everyone! Thomas Dzubin Calgary, Vancouver, or Saskatoon CANADA

1 year, 3 months

4
4
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Anyone have any IO Corp 8219HP docs or info

by Peter Ekstrom

Happy New Year everyone! I was wondering if anyone happens to have any documentation or information about the 8219HP adapter by IO Corporation? It is a protocol converter from Twinax to RS232 emulating an IBM 5219 printer. I am mostly looking for information about the option/rate switches on the back. I acquired one of these for cheap recently but haven't been able to find any information about it. Thanks!

1 year, 3 months

1
0
0 0

Axil 220/245 PSU

by Alan Perry

Does anyone here have a running Axil 220 or 245 (Sun SPARCstation LX clone)? My 220 has a dead PSU and I am trying to get it working with a modern PC PSU. But I don’t know the pinout for the power connector. While the power connector is the same as used by Sun, the pinout and, aside from +5V and GND, the wire color scheme are different. I have identified 3 of the 6 wire colors and 7 of the 10 pins. The wire color scheme seemed to be a match for early sun4c but I just found something that suggests a couple wire colors are used differently. I have found that black is ground, red is +5V, and yellow is +12V. White, orange, and blue are TBD. A marking on the PSU board suggests white is -12V. Blue and orange seem to only used by a daughter board centered on a LM339 chip. But, as a software guy, I can’t tell what it does. Anyone here have any insight here that might help me? alan

1 year, 3 months

3
8
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VCF EAST 2024 (Wall, NJ) : Registration Links and info

by Jeffrey Brace

https://vcfed.org/2023/12/31/vcf-east-2024-is-coming-april-12-13-14-infoage/

1 year, 3 months

1
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Re: Computhink Eagle 32 - software, docs, info?

by Chris Hanson

I picked up this system from its previous caretaker yesterday, to hold onto for a friend. I’ve also inventoried the major functional ICs and archived the “IPL-M” ROMs. Here’s what’s in the Eagle-32: - Main Logic Board - 8MHz 68000 CPU - 2x D8255 programmable peripheral interface - left 8255 is clearly for parallel and user port - right 8255 I strongly suspect is for hard disk, possibly ANSI or SASI - D8253C programmable interval timer - 2x 2651N programmable communications interface for serial ports - 2x 2716 for IPL-M 0/1 ROMs - Disk Controller Board - FD1701B-02 floppy disk controller - No video board, whether text or graphics Since there’s no video board in the system, and a couple of cables internally that aren’t attached to anything, I expect it was removed by a previous caretaker. This is sad because without one it’s unlikely to come up, not that anyone has found any software for it. On the other hand, there are zero PALs, so both full reverse engineering and maintenance should be straightforward. I threw the 4KB of boot ROM in Ghidra and confirmed a couple things: - At boot, ROM is mapped to 0, and then remapped either by a write to the location or by a cycle counter: The initial stack pointer at 0x0 is 0x0001fffe and the initial program counter at 0x4 is 0x00ffc026, indicating the ROM is normally located at 0x00ffc000. - The ROM freely interchanges addresses in the 0x00ffc000..0x00ffffff range and addresses in the 0xffffc000..0xffffffff range, which is annoying to deal with in Ghidra. - I/O devices appear to be in the 0x00ff8000..0x00ffbfff range, all of the devices accessed via the bootstrap seem to be barely above 0x00ff8000. - Only NMI, bus error, interrupt 2, and interrupt 5 are set up by the bootstrap. - The bootstrap is very bare-bones but still has a bunch of indirection in it; it’s obviously written in assembly, but it does seem to have parameterization so it may support both console and serial I/O. I suspect that I can figure out from the pattern of I/O accesses which devices are at which address in the memory map, at least if I bring up an emulation in MAME. That should at least allow writing new code for it, and _maybe_ even figuring out which CRT controller the video hardware uses and where in the memory map it is. (I suspect the 6845 and/or 6847 just from the time period, but who knows? Gotta see what it actually do when trying to show the “IPL IN PROGRESS” string contained in the ROM, or one of the couple error strings…) — Chris

1 year, 3 months

1
0
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qbert license?

by Steve Lewis

Perhaps slightly off topic, but perhaps someone here has a contact or idea on how to get started on this: Someone has done a Q-Bert port in 2023 to a new system. The title is different, but the "look and feel" (and audio) is pretty "authentic" to the original (not sure if using exactly the same original tiles and such, I believe it was all original work - but still, it's very much an arcade-style clone). We see now that Sony "owns" it these days (I seem to remember decades ago there a Q-bert cartoon? But perhaps remembering it wrong). The question is, how would one start on obtaining a license? I assume it wouldn't be cost effective (for a free casual port), but still just curious. I've tried to contact Sony in the past (on a different software title), but it's just a huge enterprise it's a bit challenging to approach. Just wondering on the off chance if maybe someone around here has gone down this road already? -Steve

1 year, 4 months

1
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RSTS/E questions.

by Bill Gunshannon

I am back to playing with RSTS/E 10.1 again and have a couple questions if there is still anyone around with experience. First: Is there a way to change the allowed length for passwords? Second: Is there a way to make login take the assigned name rather than the x,x format for logins? I seem to remember using a system once that did but I have no idea if it was legit or a local hack. Although I have no problem using local hacks. :-) Need to get a system going and maybe even join HECNET. I really wish there was TCP/IP for RSTS. bill

1 year, 4 months

2
1
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Sorbus Micro Handbook 1990 Update

by Jay Jaeger

I have been scanning in a lot of manuals that I have that relate to computers that are not in my collectiion, but which may be unique, or nearly so. Today I scanned in the Sorbus Micro Handbook 1990 Update, which has information provided to Sorbus FEs who might service various microcomputers. There is info in there on all sorts of stuff, including motherboard jumper/switch info up through a PS/2 model 80, for example, and lots of other manufacturer's computers and expansion cards, stuff like IOMEGA, AST, Zenith Tandon, etc. etc. It can be found in my Google drive under my directory of things I have provided for bitsavers to snag: https://drive.google.com/open?id=0B2v4WRwISEQRWWFFdVpCZWFTZEU&resourcekey=0… in subdirectory pdf/sorbus JRJ

1 year, 4 months

1
0
0 0

programming the IBM PC synchronous serial boards (Northstar Advantage project)

by r.stricklin

Did IBM ever publish programming information for their PC SDLC or BiSync communications boards? I’m wondering about the possibility of programming one to drive the synchronous protocol needed for “booting” a Northstar Advantage over its serial port. Or, for that matter, wondering what Northstar had in mind when they made that protocol synchronous - what would they have had driving it? ok bear.

1 year, 4 months

5
5
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some old PC-DOS file managers

by Steve Lewis

Hey all! I'm looking for a couple "file manager" type pieces of software. I can't find them on WinWorld. First one is from about 1984-1985, possibly called DRBOSS.COM, I just remember it used IBM extended graphics for "window" borders (which were colored red) and the filenames were either in gray or green. The main feature was you could select a few files at a time, then do some operation on those selected ones. And as a .COM it was well under 64K. The other is from around 1996, and called MWIZ or Menu Wizard. Apparently there were a few variations with possibly the same/similar name. All I recall about this one is it came with both a .EXE and a .COM, and was written by a person named Tony. I believe it was available on the '96 or '97 BYTE magazine CD, and possibly also on CompuServe (I'm not current on what the state of any CompuServe archives are these days). Not urgent - just curious if they could be found. And if anyone is in an MS-DOS mood throughout the holiday break: I still find my ancient CDIR.EXE useful even in DOSBOX or on my physical IBM 5150. It is available in my utility collection archived here: https://github.com/voidstar78/VUC4DOS For other early IBM PC notes (like floppy drive emulators and NIC setup), I have some notes here: https://voidstar.blog/ibm-pc-5150-notes/ (including all about using the tape deck!) -Steve / v*

1 year, 4 months

1
0
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VT100: Replacement for B411 Transistor

by Rob Jarratt

I think I have got my VT100 basically working now except for the actual video display. I think there is a problem with the transistor that drives the flyback transformer. This is Q414 on page 58 of the Feb82 schematic on BitSavers (https://bitsavers.org/pdf/dec/terminal/vt100/MP00633_VT100_Schematic_Feb82. pdf). I have removed it from the circuit and tested it with the diode tester of my multimeter. It does not test as two diodes, indeed across Collector-Base the multimeter beeps for a short circuit, and so I am fairly sure it is bad, The part is the one with the heatsink as shown in this picture: https://rjarratt.files.wordpress.com/2023/12/img_20231221_112305.jpg. I have found some information on it here: https://www.web-bcs.com/transistor/tc/b0/B411.php but the Feb82 schematic shows it is a BU407D. My video board is not exactly the same as the one in the schematic despite having the same DEC part number, but the circuit that drives the flyback is the same on the secondary side of T403, and includes the optional diode CR406 in the form of another B411 transistor that is not connected at the emitter. I am trying to identify a replacement and could do with some help identifying one. I can't find a full datasheet for the B411, all I can find is this https://www.web-bcs.com/transistor/tc/b0/B411.php, which seems to match the part I need to replace, and I have also found one for a BU407 (not BU407D) here https://www.mouser.co.uk/datasheet/2/308/1/BU407_D-2310257.pdf. I have tried to find something that meets or exceeds the voltage, current and switching time specs. I have found a couple of possible replacements and would welcome opinions on their suitability: https://www.farnell.com/datasheets/2861437.pdf and https://www.farnell.com/datasheets/3033460.pdf (assuming that the switching times are a typo and they are in microseconds rather than seconds) Do these seem like suitable replacements? Thanks Rob

1 year, 4 months

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HAPPY DEC-20 DAY!

by Rich Alderson

Happy DEC-20 Day! My late friend Mark always noted that TOPS-20 (and the DECSYSTEM-20 on which it runs) was a great improvement on its successors. I wish you all a joyous Winter Solstice Festival, however you may choose to celebrate it. Rich

1 year, 4 months

4
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PDP 11/34 or 11/04 front panel question

by Tom Hunter

The PDP 11/34 and 11/04 front panels (both operator and programmer) use a somewhat stiff plastic sheet of 1.0 mm thickness with DEC logo, model designation, labels for the keys printed on it, cut-outs for the keypad and knob and red transparent sections for LEDs and 6 digit 7-segment display. I don't know what the industry calls this type of plastic sheet? Is it a "decal"??? This plastic sheet is (was) fixed to an anodized aluminium plate (1.6 mm thickness) using some type of glue which has deteriorated so that the plastic sheet has separated from the aluminium plate. The glue looks like it has been sprayed on and has a light yellowish-brown appearance. The glue readily dissolves in ethyl-alcohol and acetone, but is unaffected by water, petrol (gasoline) and dry cleaning fluid (white spirits). I would like to glue the plastic sheet back onto the aluminium plate, but worry about damaging the plastic sheet and/or paint by the solvents in typical glues. Also some glues don't allow any adjustment once you combine the two halves of whatever you glue together. What type of plastic is this plastic sheet likely made of (polycarbonate?) and what paint was used? I am asking to determine what solvent based glues may attack either the plastic sheet or the painted surfaces. The dark grey and transparent red paints are applied to the back side of the plastic sheet, so they are vulnerable to solvent attack when glueing. I tried ethyl-alcohol in one corner which is obscured by the cast metal surround and some of the dark gray colour came off with the alcohol and gentle rubbing. Has anyone successfully glued back the plastic sheet to the aluminium plate? If yes, what type of glue did you use and how exactly did you do the operation? Any suggestions, advice or tips? Thanks and best regards Tom Hunter

1 year, 4 months

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(no subject)

by brian＠quarterbyte.com

> > The one I haven't found yet is: f29bdg00.boo The Google suggests: http://www.edm2.com/index.php/Common_User_Access which has working links to f29al000.boo and f29bdg00.boo on IBM servers I've done a lot of work converting technical documentation archives from DCF and Bookmaster to Word and XML, but always worked from source, never .BOO.

1 year, 4 months

3
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Re: IBM .BOO format

by David Schmidt

On 12/11/23 1:00 PM, Liam Proven <lproven(a)gmail.com> wrote: > Does anyone have any experience with the IBM BookManager format and the > tools to read it? > > I've not found any way to open them on a Mac. No joy on Linux yet > either; there's an old unmaintained tool that uses a 32-bit Java app. > > I found 2 Windows tools. > > One, IBM Library Reader, won't install on Win11. I have it running in a Windows NT VM, and it prints to PDF using BullZip just fine. Do you want to point to the library you want to convert, and I can run this over them?

1 year, 4 months

2
3
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Re: 6800 fig-FORTH?

by Doug Jackson

Hi Stephen, Sorry to use your Fig Forth thread - I too have a Corsham 6809 system, with a SD card - I can not for the life of me figure out what files / how to put stuff onto the SD card to boot - either Basic or Flex/09. If you had success down the Fig route that would also be great - but do you remember how to use the SD system? Kindest regards, Doug Jackson em: doug(a)doughq.com ph: 0414 986878 Follow my amateur radio adventures at vk1zdj.net On Sun, 24 Jun 2018 at 05:16, Stephen Pereira via cctech < cctech(a)classiccmp.org> wrote: > Hi folks, > > I know there's not much 6800 activity here, but I figure this would be > worth a try. > > Has anyone here ever seen or ever had fig-FORTH for the 6800 working? > > I have a SWTPC replica system from Bob Applegate / Corsham Technologies, > and I love it. It came with a complete 64K RAM, as well as the SWIBUG > monitor, and the monitor code has been extended by Bob/Corsham to interface > with an SD Card sub-system for floppy disk emulation. This provides the > original terminal access to the machine with the simple system monitor, and > also the FLEX OS for running programs. It is a blast to use. > > Recently, I took a look around and found the fig-FORTH listing as > originally published back in 1979, and also a Source Forge site that holds > an electronic copy: > > https://sourceforge.net/projects/asm...th_6800-stuff/ < > https://sourceforge.net/projects/asm68c/files/fig-forth_6800-stuff/> > > I've managed to get the source code to assemble with a cross-assembler > supplied by Bob/Corsham. It does not produce an exact copy of the original > code, because the code uses the JMP instruction pretty much exclusively, > and the assembler substitutes a relative BRA instruction sometimes. So my > code ends up being several bytes shorter because of saving one byte each > time a JMP is replaced by a BRA. That said, it appears to me that the code > matches up with the original listing otherwise. > > So my problem is this: When I run the code on my system, fig-FORTH seems > to sign on, and will accept input from the keyboard (double echos of each > key typed) but it then does not proceed to interpret the command entered. > The interesting thing I see by winding my way around in the code is that it > has already properly performed a bunch of setup and produces the initial > "Forth-68" sign on, and that has required it to already be using many of > the Forth commands that were defined by machine language. This indicates to > me that some of the command interpretation is working. The I/O from/to the > terminal is by calls to the system monitor I/O routines, and that seems to > be also working, despite the double echos of the typed characters. It just > does not proceed to interpret what is typed in at all. > > Of course, I have no idea if this code ever worked properly, or if I am > encountering early buggy code. So I'm looking to see if anyone else has > ever seen the fig-FORTH working on a 6800 system? Any pointers to good > working code? > > Thanks for listening! > > smp > - - - > Stephen Pereira > Bedford, NH 03110 > KB1SXE > > >

1 year, 4 months

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Vintage Computer Festival 6 talks recovered!

by Jeffrey Brace

It's been 20 years now since VCF 6. VCF 6 took place October 11-12th, 2003 at the Computer History Museum The web page for that event is: https://vcfed.org/events/archives-show-summaries/vcf-west-archives/vcf-west… Due to the extraordinary efforts of Kay Savetz, Clay Cowgill, and Josh Malone over the past two years, some of the talks from Vintage Computer Festival 6 have been recovered! The recordings were in very poor condition and took extreme measures to recover. The audio is often not good. Sometimes it is very bad. But this is the best that they could do from very bad recordings. C. H. Ting, Jef Raskin, John Ellenby, and Gary Starkweather are dead now, so these are voices from those who passed. They have the audio of the five recoverable sessions from VCF 2003 up at Internet Archive. Len Shustek – Computer History Museum https://archive.org/details/len-shustek-computer-history-museum Bruce Damer – The Joys and Trials of Computer Collecting https://archive.org/details/bruce-damer-computer-collecting David Jaffe / C. H. Ting / Kevin Appert / Dwight Elvey – Forth https://archive.org/details/vcf2003_forth Jef Raskin – Apple and the Humane Environment https://archive.org/details/vcf2003_jef-raskin John Ellenby / Gary Starkweather / Dave Robson / Peter Deutsch / Charles Simonyi – Xerox Alto panel https://archive.org/details/xerox-alto-panel ======== Jeff Brace VCF National Board Member Chairman & Vice President Vintage Computer Festival East Showrunner VCF Mid-Atlantic Event Manager Vintage Computer Federation is a 501c3 charity https://vcfed.org/ <http://www.vcfed.org/>

1 year, 4 months

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IBM .BOO format

by Liam Proven

Does anyone have any experience with the IBM BookManager format and the tools to read it? I've not found any way to open them on a Mac. No joy on Linux yet either; there's an old unmaintained tool that uses a 32-bit Java app. I found 2 Windows tools. One, IBM Library Reader, won't install on Win11. https://www.ibm.com/support/pages/ibm-library-reader-windows The other a Java app, IBM Softcopy Reader. https://www.ibm.com/support/pages/ibm-softcopy-reader It installs and runs on Win11 and I can print to PDF -- but only 1 page at a time. Selecting multiple pages give me an empty PDF. I found the original IBM CUA documentation and want to convert it to some more modern, open format, but I am not having much luck... -- Liam Proven - Profile: https://about.me/liamproven Email: lproven(a)cix.co.uk - Google Mail/Hangouts/Plus: lproven(a)gmail.com Twitter/Facebook/Flickr: lproven - Skype/LinkedIn: liamproven IoM: +44 7624 227612 ~ UK: +44 7939-087884 ČR (+ WhatsApp/Telegram/Signal): +420 702 829 053

1 year, 4 months

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New Dates for VCF East 2024: April 12, 13, 14

by Jeffrey Brace

We have decided to move VCF East to April 12, 13 & 14. There was a significant number of people that were traveling to see the solar eclipse, which takes place on April 8 in the United States. If we didn't move the date, then attendance would have been impacted significantly. Those dates are available at InfoAge and are now reserved. More details will be coming soon: * Consignment moving to a new more spacious location * Possible on-site food cooking * Discount hotel blocks * More great speakers * Plus more! The themes this year: 1) The Rise of the GUI 2) Computer Art Thanks! Jeff Brace VCF National Board Member Chairman & Vice President Vintage Computer Festival East Showrunner VCF Mid-Atlantic Event Manager Vintage Computer Federation is a 501c3 charity https://vcfed.org/ <http://www.vcfed.org/>

1 year, 4 months

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Datapoint 2200 simulator - looking for more software.

by Mattis Lind

Hello! I have an ongoing project to restore a Datapoint 2200 version II and in the process of doing so I created a small simulator for it to understand it better. The simulator is now in the condition that it runs the cassettes that I try on it quite well. The simulator compiles on Macos and Linux. https://github.com/MattisLind/DP2200 A short movie clip when it is running: https://youtu.be/XfsMBhP13ww?si=CHpFKe8eecWjdxDC Having a simulator for a 2200 if there is no software around is no point. There are some tapes on bitsavers.org and a couple of other collectors do have cassettes that can be read. But is there anyone else out there that is sitting on tapes for a Datapoint 2200 (or 5500, 6000, 6600)? Tapes can be read on a normal mono audio cassette tape recorder and fed into a PC which samples the signal, preferably at 44100 kHz with 16 bit resolution. It is important to not overdrive the input of the computer so that the signal becomes a square wave. /Mattis

1 year, 4 months

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VCF East 2024 Pre-Event Survey Results

by Jeffrey Brace

https://bit.ly/vcfe2024pre_results

1 year, 4 months

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3D printing the Difference Engine

by Chuck Guzis

For your edification: https://hackaday.io/project/193805-3d-print-babbages-difference-engine-no2 --Chuck

1 year, 4 months

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Ampex and the DG Compatible Market

by pbirkel＠gmail.com

Although I knew that Ampex was a supplier of Multibus non-volatile RAM boards (MC-8080 and MCM-8086) - Memory Products Division - I didn't realize that they had competed for a while in the DG-compatible market alongside companies like Digidyne, Fairchild, Bytronix, and SCI Systems (according to court documents and the trade press). Can anyone shed light on what they offered and when? And perhaps why? Thank you, paul

1 year, 4 months

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VCFed warehouse closure reminder

by Thomas G

Hello all, This is a reminder that the Vintage Computer Federation's warehouse will be sealed for renovation, reorganization, and inventorying starting on *January 1st, 2024*. As such, no items will be permitted into or out of the warehouse unless absolutely necessary. As many VCF members have used the warehouse for storage of their personal belongings, it is imperative that they either come to retrieve their belongings or notify me off-list ( thomas.gilinsky(a)vcfed.org) what of theirs is currently stowed in the warehouse so that I may tag it and relocate it outside of the warehouse. Please provide *verifiable proof* that the item in question is your personal property, AND that it was not given to VCF as a donation. *All items within the warehouse that have not been verified and tagged by January 1st will be treated as the property of VCF.* If your item has been verified and tagged before January 1st, but you are not able to collect it, then you will still be able to pick it up after the cut-off date, but *ONLY* if it has been verified and tagged. And, of course, we will periodically nag you to come collect as well. Thanks, -Thomas Gilinsky Vintage Computer Federation Warehouse Manager

1 year, 4 months

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SMS Scientific Micro Systems corp history?

by Shoppa, Tim

SMS was based in Mountain View starting in the 70's. They sold DEC-compatible Q-bus storage systems in the early 80's and transitioned into IBM PC disk storage ASICs and boards under the OMTI brand in the late 80s. What happened to them after that? Some CC'er in Silicon Valley must know :-) Tim N3QE Get Outlook for iOS<https://aka.ms/o0ukef>

1 year, 4 months

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Trouble with a Samsung monitor

by Van Snyder

I have a formerly-gorgeous 27-inch Samsung monitor: Model LF27T350FHNXZA Serial 0AS1HCNR904588L S/W M-T3527FGGA-1006.1 that now has a minor defect. The "wallpaper" has a dim stripe about 1/6th of the screen width, top-to-bottom, about 1/6th from the right edge, where the blue band appears when I run its self test. Windows display almost normally, with a little bit of dimness in that band for some colors. White is fine, black is gray, .... Changing the wallpaper doesn't change it. Fiddling with its internal settings doesn't change it. Photo at http://vandykle.mynetgear.com/Samsung-27.jpg. Is this the sort of thing that can be repaired at reasonable cost, or should I just live with it until the monitor fails altogether?

1 year, 4 months

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Signetics 3000KT8080SK bit slice 8080 emulator

by Mike Stein

Any interest in one of these boards? Complete except for U3, an empty 16 pin DIP socket. With some kind of transition board attached from Zapsystems, a local builder IIRC. https://archive.org/details/bitsavers_signeticsdMicroprocessor_9921635/page…

1 year, 4 months

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Burroughs TD700

by Mike Stein

Do any of you three or four TD700 owners out there need any parts? I'm about to scrap a couple (in the Toronto area). m

1 year, 4 months

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Current SOA scsi disk emulators for DEC

by Douglas Taylor

That is my question. I have used a couple of versions of the SCSI2SD boards in the past with Viking, Emulex QC07, DEC RQXZ1 controllers in the past, and also direct connections to MicroVax SCSI buss's. There are other manufacturers of these SD to SCSI emulators now. What is the current SOA? What works, what doesn't work with DEC hardware? Doug

1 year, 4 months

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Re: Current SOA scsi disk emulators for DEC

by Craig Ruff

I'm currently using a version 5 something (5.4 I think) of the SCSI2SD in my 11/83 to run 2.11BSD, it has worked well.

1 year, 4 months

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Re: Unknown Viewsonic monitor flashes Red-Blue-Green-White

by Gregory Beat

Viewsonic 22 inch VX2262wm widescreen LCD VGA up to 1680 x 1050 resolution, VIDEO Response as fast as 2ms. Viewsonic LCD VX2262wm (brochure) https://www.viewsonic.com/eu/products/sheet/VX2262wm === It was apparently indeed in a self-test mode. When I fed it, it actually worked well. When I looked at it using my video configuration in KDE on Debian 12, it claims to be a Viewsonic VX2262wm. Van Snyder

1 year, 4 months

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Unknown Viewsonic monitor flashes Red-Blue-Green-White

by Van Snyder

I was given a 22-inch Viewsonic monitor. The label had been scratched off. It has four switchesd below the screen, labeled 1, 2, an up arrow, and a down arrow. When I plug it in, it flashes Red, Blue, Green, White at about one- second intervals. Pushing the buttons doesn't affect it. I haven't attached a VGA or DMI to it. Is it irreparably broken? Van Snyder

1 year, 4 months

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VT100 Monitor Board

by Rob Jarratt

Hello, As some may recall I have been working on getting a VT100 going again. I have made good progress and I think the main board is probably OK now (see here if you are interested: https://robs-old-computers.com/2023/11/19/vt100-keyboard-constant-clicking-f ault/). Possibly I still need to replace the NVRAM, but I am leaving that until I fix the problem I want to describe next. The problem is that there is no image on the screen. This is because the monitor board is not doing anything, there is no glow from the neck of the tube etc. I have found that this is because the fuse on the 12V input to the monitor board is open circuit. Of course the worry is, why? There could be a fault on the board. I have tested the transistors in circuit with a multimeter and they appear to be OK. I used a bench PSU to give the board 12V and it drew no current (with all connectors disconnected). I tried again with the round connector attached to the end of the tube and it drew about 100mA and there was a faint glow from the neck of the tube. I am hesitant just to replace the fuse and try it. I am hoping for some suggestions on how to test this safely (in particular without involving the flyback transformer) to find if there is a fault. For information, the monitor is an Elston and I pre-emptively replaced all the electrolytics on the monitor board apart from the non-polar one. Some details of what I did are here https://robs-old-computers.com/2023/10/01/vt100-ram-fault/. Although I have since realised that I didn't replace two of them because they looked like diodes. I don't think the board I have is the one in the available printsets. Thanks Rob

1 year, 4 months

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Intel 4004

by Murray McCullough

On Nov. 15, 1971 Intel commercially released the 4004 microprocessor which some consider to be the first. Nonetheless, even if not in agreement, it made possible the instrument which drives the classic-computing industry or at the very least our hobby! Happy computing. Murray 🙂

1 year, 4 months

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Re: Intel 4004

by Rick Bensene

Steve Lewis wrote: > then like the 4004, we're struggling to find evidence of actual products that > made use of them. Wasn't the 4004 used in some cash registers, street lights, or > some weighing machines? (I don't have any specific references, just recollections > from past reading) The major (and primary reason for the 4004 and the MCS-4 family existing in the first place) was Nippon Calculating Machine Co and their Busicom 141-PF electronic printing desktop calculator. NCM went to the US looking for a chipmaker (the capability for the level of integration required to make such a chipset did not exist in production form anywhere else in the world at the time), and two companies were engaged to develop a chipset for NCM, one being Intel, and the other being Computer Design Corporation. As history clearly points out, Intel won the competition, developing a chipset based on the 4004 CPU, and some peripheral chips (RAM, ROM, I/O) that ended up being the operating element of the NCM/Busicom 141-PF Calculator. The 141-PF is a very famous calculator for this reason, but is otherwise (by appearance and function) a very ordinary calculator for the time. The fact that it had "Intel Inside" (though the term didn't exist at the time), using the world's first commercially available microprocessor chipset made with MOS Large Scale Integration technology, makes the 141-PF (and the OEM copies; the NCR 18-36 and the Unicom 141). Two versions of the machine were made, one that was a four-function machine, and another that added an extra ROM that added a square root function. Other devices were subsequently developed that used the 4004 as their computing core, such as digital scales, electronic cash registers, and various other electronic devices. This was only possible because initially, Nippon Calculating Machine Co. had exclusive rights to the use of the chipset. Due to some financial difficulties, NCM renegotiated the contract with Intel, removing the exclusivity clause in return for Intel forgiving some money owed on the development of the chips. This allowed Intel to sell the chipset to the open market. Once this occurred, Intel aggressively marketed the chipset as the MCS-4 microprocessor system, providing extensive documentation, development tools, both hardware and software, and lots of support for anyone wishing to develop an electronic system based on the 4004. The Busicom 141-PF calculator and its OEM versions were the first commercially-available electronic devices that had a general-purpose microprocessor with firmware implementing the machine’s logic, and thus represent the historical benchmark. These were actual products that were sold under the Busicom brand as well as NCR and Unicom. It isn’t known how many of these machines were actually made, but enough were made that they can still (rarely, though) be found today. Nippon Calculating Machine Co. in Japan manufactured and distributed them under their Busicom brand name, as well as providing the machines with subtly changed color schemes for cabinet/keyboard to OEM customers, which would market, sell, and service them under their own brand names. Rick -- The Old Calculator Museum https://oldcalculatormuseum.com P.S. If anyone out there has one of these calculators lying around gathering dust, working or not, and would like to have it see new life as part of a museum exhibit, please get in touch with me.

1 year, 4 months

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It's been a while - retirement project

by Dave Dunfield

>>[anyone know if there's a usable web interface to CCTALK? I browse it >>through the ARCHIVE on CCTALK.COM >KenUnix - 27 Nov 7:13 p.m. >When I try and connect to it I see in the tab chinese verbiage >CCtalk ???????????-?????????????? and it tries to send me to public.hujia.104.cdn20.com Sorry, my mistake - I meant the CCTALK archives at: classiccmp.org Dave -- ---------------------------------------------------------------------------------- Search "Dave's Old Computers" see "my personal" at bottom!

1 year, 4 months

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It's been a while - retirement project

by Dave Dunfield

>26 Nov 8:14 p.m. >I was trying to format an HP LIF disk from IMD (77 tracks, 30 sectors, >5 interleave, 512 MFM encoding, 256 bytes per sector). Which I can configure >IMD for using the interactive user interface. EXCEPT it won't >accept entering sector numbering starting from 0 to 29. It always wants to >start at 1. >So it looks like it's just a trivial bug in the interactive user interface. Hi Marc, I'll look into it - it will take me a while as I have to dig out and set up a real DOS IMD system... [anyone know it there's a usable web interface to CCTALK? I browse it through the ARCHIVE on CCTALK.COM - it's a web interface which presents "reply" button - but it doesn't work - so I have to cut/paste/edit the existing post and send it back by email - and HOPE that it finds its way to the proper thread!] Dave -- ---------------------------------------------------------------------------------- Search "Dave's Old Computers" see "my personal" at bottom!

1 year, 4 months

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Pre-event survey: VCF East 2024

by Jeffrey Brace

Please fill out this pre-event survey for VCF East 2024: https://bit.ly/vcfe2024pre Thanks! Jeff Brace VCF National Board Member Chairman & Vice President Vintage Computer Festival East Showrunner VCF Mid-Atlantic Event Manager Vintage Computer Federation is a 501c3 charity

1 year, 4 months

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It's been a while - retirement project

by Dave Dunfield

Hi, this is "Dave Dunfield" - best known here for being the site owner of "Daves Old Computers" and the author of "ImageDisk" No longer have the email I used to use to access cctalk... (hence the change) Just in case anyone is interested: I've been working on a "retirement" project: I am publishing some 40+ years worth of source code to "stuff I've written". This includes my DDS products, lots of "internal tools and utilities" and other misc. "stuff". Of special interest to cctalk members, this include my Altair, Horizon, H8, D6809, MOD8, ImageDisk and some other related material. Most of it is C (mainly for my own compiler - one of the items), some in assembly, and a few "custom languages". Available from my personal site: https://dunfield.themindfactory.com or go to: "Daves Old Computers" -> "Personal" Please note that I no longer monitor these forums on a regular basis. Anyone wishing to reach me, please see the "contact" link on my site. Dave -- ---------------------------------------------------------------------------------- Search "Dave's Old Computers" see "my personal" at bottom!

1 year, 4 months

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Re: Intel 4004(sp?)

by Dave Dunfield

Sorry if not linked correctly - looking through the list via the archives.. "reply" option doesn't seem to work (at least for me - older Chrome) >but my understanding was that the 4004 and 8008 were effectively developed >at the same time? And were announced or available about within one month >of each other? I believe they were, although I never had much experience with the 4004... I did play a bit with the 8008 - and wrote a simulator/emulator for the 8008 system I had, a Canadian: MIL (Microsystems International Limited) MOD8 (Modular-8) it was also available as: GNC8 (Great Northern Computers) 8008 You can get MOD8 simulator from "Daves Old Computers" and actually experience using an 8008 based system including the built in "MONITOR-8" ROM software as well as "Scelbi 8008 BASIC" (one of the earliest) - source to both provided. If you care to, I included ASM88 (my 8008 cross assembler) so you can try writing and running 8008 code! -Be aware that MOD8.COM itself is pretty old and is 16-bit DOS software. This means it WON'T run under modern Windows, but it does work well in DosBox (I recommend the one I have on my site) Dave Dunfield - https://dunfield.themindfactory.com -- ---------------------------------------------------------------------------------- Search "Dave's Old Computers" see "my personal" at bottom!

1 year, 4 months

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iPaqs free to good home (UK)

by dave.g4ugm＠gmail.com

Folks, While looking for something else I found few iPaqs. There are two later models, mud coloured with plastic screen covers both work fine. Sadly the silver one with the battery has a broken clip, so you need to secure it some how works if you do this. The one with the missing door does nothing. There are two power bricks, one USB lead, one docking station. No stylus. Can't remember when I last looked at these. Free collection from Manchester. Dave

1 year, 4 months

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Re: VT100 Monitor Board

by Dave Dunfield

> Rob Jarratt 25 Nov 2023 8:47 a.m. > Of course the worry is, why? There could be a fault on the board. > I am hesitant just to replace the fuse and try it... An older CRT terminal is probably a bit too much current draw for this, but you can prob use it in a setup to test parts... A very handy gadget you can make very easily, which I use all the time when testing small devices in "unknown operational state" is a simple current limiter. (following discussion based on North America power, numbers may be different if you are in a different part of the world). The "smallest" typical line circuit is 15A which is more than enough to cause damage to small devices experiencing excessive power draw through a fault (often indicated by a blown fuse). The "limiter" relies on the fact that an incandescent light bulb will draw/pass a fair bit of current when it is cold, and much less when it's warm. (this is because they are designed to "turn on" fast) In my case, I have three light sockets wired in parallel, all in series with the hot side of a receptacle. This lets me change from a single 25w bulb (very little current possible) up to 3 100w bulbs (a good part of amp before it seriously limits). For example, 100w bulbs draw .833ish (100/120) when operating fully lit - x3 = 2.5A max current - this would only happen if the device under test was "shorted", presenting 0 series resistance and would therefore effectively have 0 volts across it. In practice, you could prob. draw 1/2 amp (160ish ma per bulb) without warming them "too much" to seriously drop a lot of voltage. Much more than that and the bulbs will light up rather than hearing "popping" sounds from the device under test :-) -- Btw, I've given most of my CRT terminals away - For VT100's I use my "PC100" program - It provides very good VT100 emulation using an old DOS (or DosBox) PC - it remains "text" mode, so it turns "smooth scroll" into "slow scroll" and large fonts into "double spaced" fonts - but in all other respects nothing I've used it on has been able to tell it's not an actual VT100! (I'm sure there are better/graphical VT100 emulations "out there") Dave -- ---------------------------------------------------------------------------------- Search "Dave's Old Computers" see "my personal" at bottom!

1 year, 5 months

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Available in Germany: PDP 11/23 Plus with two RL02 drives in a H9642 cabinet

by P Gebhardt

Hello list, there is a PDP 11/23 Plus with two RL02 drives available near Stuttgart, Germany. The configuration corresponds to the one shown here: http://www.cosam.org/computers/dec/pdp11-23/cabinet.html Contact me off-list if you are interested. Cheers, Pierre ----------------------------------------------------------------------------- http://www.digitalheritage.de

1 year, 5 months

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It's been a while - retirement project

by silcreval

Dave, Many thanks for making this source available, I'm going to spend some time looking through it all.

1 year, 5 months

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Hayes numeric codes

by RETRO Innovations

I received a bug report today concerning tcpser (the Linux/Unix/Windows/MacOS modem emulator) and numeric response codes. https://github.com/go4retro/tcpser/issues/31 I knew long ago that not all codes and commands were common/consistent among modem manufacturers, but I guess I didn't realize even response codes differed quite a bit. After receiving the bug report, I did a bit of research, and found, for instance, CONNECT 19200 differs: Hayes - 14: http://www.bitsavers.org/.../Hayes_44-012_Technical... <http://www.bitsavers.org/pdf/hayes/Hayes_44-012_Technical_Reference_For_Hay…> Conexant - 16: https://web.archive.org/.../documenta.../dial_up/100498D.pdf <https://web.archive.org/web/20151028101531/http://www.zoomtel.com/documenta…> USRobotics - 85: https://support.usr.com/.../5610a/5610a-files/5610a-user.pdf <https://support.usr.com/support/5610a/5610a-files/5610a-user.pdf?fbclid=IwA…> Phoenix Contact (industrial modem) - 16: https://files.realpars.com/.../um_en_psi_data_basic_modem... <https://files.realpars.com/phoenixcontact/manuals/um_en_psi_data_basic_mode…> Supra - 16: https://www.manualslib.com/.../Diamond-Supraexpress-56e.html <https://www.manualslib.com/manual/1424004/Diamond-Supraexpress-56e.html?fbc…> Multi_Tech -19: https://www.multitech.com/.../public.../manuals/s000316a.pdf <https://www.multitech.com/documents/publications/manuals/s000316a.pdf?fbcli…> I have two questions for the group, if folks can assist: * Since I purport to be Hayes compatible, I should use the Hayes code when available, but the reference above does not go above 38400 bps. Did Hayes make a modem that went faster (DTE speed?) and if so, can I get a scan of the manual to ensure the codes I am using are the best ones? * Any other modem manufacturers anyone is aware of, with manuals I can check. Jim -- RETRO Innovations, Contemporary Gear for Classic Systems www.go4retro.com store.go4retro.com

1 year, 5 months

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Nice 32 dollar goodie to display your 4004 in!

by ED SHARPE

https://www.ebay.com/itm/276167634394?mkcid=16&mkevt=1&mkrid=711-127632-235… Sent from AOL on Android

1 year, 5 months

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Re: Intel 4004(sp?)

by Smith, Wayne

Not a COMPUTER but I have a Pro-log M900 EPROM burner that has a second source INS4004 on the board. This isn't my M900 (my INS4004 is white/gold), but here is a view of the board/chip: http://www.wolfgangrobel.de/programmer/img_m900/m900_06.jpg -W Date: Wed, 22 Nov 2023 09:36:19 -0500 From: Paul Koning <paulkoning(a)comcast.net> Subject: [cctalk] Re: Intel 4004(sp?) To: ED SHARPE <couryhouse(a)aol.com>, "cctalk(a)classiccmp.org" <cctalk(a)classiccmp.org> Message-ID: <7ECB8A1C-DB41-45E7-9416-F71AD3289C94(a)comcast.net> Content-Type: text/plain; charset=us-ascii > On Nov 22, 2023, at 3:51 AM, ED SHARPE via cctalk <cctalk(a)classiccmp.org> wrote: > > Was there ever a COMPUTER using a 4004 that you cud really do something or did tat finally arrive with the 8008 as in the skelby shelby sp? 8008 i now there was an Intel INTELIC 4 (?sp) could n that use 4004 or one of the later 4000 numbered proc. We have an intelec 8 and 8 inch floppy drives here at smecc musem .... always wanted a 4!Ed Don't know about commercial products. But a classmate of mine got Honors in Independent Study for a project where he built a useable general purpose computer out of a 4004, plus a boatload of other stuff. It filled a wire-wrap panel board about 8 x 10 inches. He wrote some software for it as well, and took it to a summer internship at one of the National Labs (in the Midwest -- Argonne?) where as I understand it they liked it enough to ask him for a copy of the system. He graduated in 1975, so the work was done in the year or so leading up to that. One complication was the terminal I/O (Teletype 33); originally he had a bit-banging interface for that, which isn't easy on a 4004. At some point he finagled a UART chip out of one of the DEC field service engineers, I think that was one of the first single chip UARTs, used in the earlier DEC PDP-11 terminal adapters. paul

1 year, 5 months

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Re: Intel 4004

by ED SHARPE

what about that intel 3000 bit slice thing is it almost a microprocessor yes no and why? Ed# In a message dated 11/21/2023 3:34:03 PM US Mountain Standard Time, c.murray.mccullough(a)gmail.com writes: There are 5 other possibilities for the honour:e or noe and why? No. 2: Texas Instruments applied for a “computing systems CPU” in 1971 and awarded a patent in 1973. The question though is: did TI have a functioning processor based on the TMS1000. Not sure if they did! No. 3: “In 1969 Four-Phase Systems built the 24-bit AL1, which used multiple chips segmented into 8-bit hunks, not unlike a bit-slice processor. In a patent dispute a quarter century later proof was presented that one could implement a complete 8-bit microprocessor using just one of these chips. The battle was settled out of court, which did not settle the issue of the first micro.” No. 4: Is this the first microprocessor? Here is a source: https://historydraft.com/story/microprocessor/pico-electronics-and-general-… No. 5: "In 1969 Four-Phase Systems built the 24-bit AL1, which used multiple chips segmented into 8-bit hunks, not unlike a bit-slice processor. In a patent dispute a quarter century later proof was presented that one could implement a complete 8-bit microprocessor using just one of these chips. The battle was settled out of court, which did not settle the issue of the first micro." It seems the answer depends on what is a microprocessor...I suppose when it comes down to capitalism patents count more than anything else! Happy computing, Murray 🙂 On Tue, Nov 21, 2023 at 5:00 PM ED SHARPE via cctalk <cctalk(a)classiccmp.org> wrote: I had heard something about a f14 chip pehS being first but not avail. To general public???Ed# Sent from AOL on Android On Tue, Nov 21, 2023 at 2:41 PM, Joshua Rice via cctalk<cctalk(a)classiccmp.org> wrote: On 21/11/2023 09:03, ED SHARPE via cctalk wrote: > So what are the other contenders and what do they bring to table The 4004 was definitely the first commercially available single-chip CPU on the market, but if you include multi-chip LSI designs, the lines get blurry.

1 year, 5 months

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Two items for RSTS/E

by Paul Koning

I just pushed two additions to https://github.com/pkoning2/decstuff : In "patches" a new patch for the DEUNA driver. This fixes a problem seen when doing user (as opposed to DECnet) I/O, as well as two errors that show up when using units beyond the first. Directory "ntp" is new. This is a simple NTP protocol client for RSTS, which will synchronize the system clock with an NTP server on the LAN. It includes handling of timezone rules, so the right thing will happen at daylight savings time (summer time) boundaries. The clock is maintained to the full RSTS resolution -- typically 1/50th or 1/60th second, but can be as low as 10 ms if the KW-11/P clock is used. paul

1 year, 5 months

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List of DEC boards

by Rod Smallwood

Here's my list of spare boards Omnibus MM8-E M8320 M8650 M849 M8310 M8300 M8330 Unibus RX11 G7273 M9970 M9047 M9714 QBUS M7941 M8029 RXV21 M7504 DEQNA-M M7850 M7546 M8186 KDF-11 M9400-YC M7555 RQDX3 Rod Smallwood

1 year, 5 months

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Address wrapping in PDP-11 MMU

by Paul Koning

I'm working on some code where it would be handy to map the top of the I/O page along with the bottom of physical memory. An obvious hack is to point the APR to the I/O page address needed, then set the length so that the address modulo 2^22 also covers the low memory range. It seems from the architecture manual that this would work, and SIMH seems to do this (since it adds VA and PAR then masks with a 22 bit mask). Would this work on real hardware? paul

1 year, 5 months

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Free to good home HP 7510a Photo Plotter - UK

by dave.g4ugm＠gmail.com

Folks, Trying to reduce the weight in my loft and I would like to donate my HP Photoplotter to a good home. . Photos of the plotter and some sample plots are on my OneDrive here:- https://1drv.ms/f/s!Ag4BJfE5B3ongspXY7zySSZsDj-WMg It has both serial and IEEE interfaces and uses HPGL like the GP and Roland pen plotters. The plots on there are the samples built into the plotter taken on a Fuji XE-1 digital camera and are cropped because the Fuji does not have a full frame sensor. The tube is actually a white tube and the colours are generated by rotating colour filters. Its powered by a 68000 and you can see the various boards in the pictures. Dave

1 year, 5 months

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Re: Free to good home HP 7510a Photo Plotter - UK

by dave.g4ugm＠gmail.com

> -----Original Message----- > From: Guy Dunphy <guykd(a)optusnet.com.au> > Sent: Thursday, November 16, 2023 9:54 PM > To: General Discussion: On-Topic and Off-Topic Posts <cctalk(a)classiccmp.org> > Subject: Re: [cctalk] Free to good home HP 7510a Photo Plotter - UK > > Hi Dave, > > I'm very interested, and happy to pay for packing and airfreight to Australia. Also had one other query. I will now keep things private... > Also something for the unit. Do you happen to have originals of the manuals, or > just the digital ones you've posted? I don't think I have any paper manuals. > > Do you have a 'pack and ship' company nearby, who could do a safe packing > using foam-in-place, or soft foam block padding, then send by airfreight to > Sydney Australia? > I should have said the plotter came to me from France packed in expanded foam. I think I may still have the packing.. I will check and report back... > I'm fully aware of the costs, having recently had a HP 7586B pedestal plotter > sent from San Francisco in a big wooden crate (vial PCL sea freight) and a 20' > shipping container full of thousands of service manuals arriving by sea form the > USA in a few days. OK I have shipped an IBM 3174 screen controller to Europe, and a E-Prom programmer to the USA so I may also be reasonably experienced... > > If you'll pass the photo plotter on to me, please reply via private email. Ok let me talk privately... > > Kind regards, > Guy > Dave > At 10:24 AM 16/11/2023 -0000, you wrote: > >Folks, > > > > > > > >Trying to reduce the weight in my loft and I would like to donate my HP > >Photoplotter to a good home. > > > >. Photos of the plotter and some sample plots are on my OneDrive here:- > > > > > > > >https://1drv.ms/f/s!Ag4BJfE5B3ongspXY7zySSZsDj-WMg > > > > > > > >It has both serial and IEEE interfaces and uses HPGL like the GP and > >Roland pen plotters. > > > >The plots on there are the samples built into the plotter taken on a > >Fuji > >XE-1 digital camera and are cropped because the Fuji does not have a > >full frame sensor. > > > >The tube is actually a white tube and the colours are generated by > >rotating colour filters. > > > >Its powered by a 68000 and you can see the various boards in the pictures. > > > > > > > >Dave > > > > > > > > > > > >

1 year, 5 months

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Need a SCSI 1/2' tape drive

by steve shumaker

Greetings all.. I'm looking for a Qualstar 1260S 1/2" tape system to review/recover data from a stack of early Landsat tapes that I came into a while back. I'd prefer the Qualstar SCSI system for familiarity but basically I'm looking for a SCSI unit that can read 6250 GCR tapes. I'd prefer west coast area to avoid shipping but given their (lack of) availability I'm open to talking with anyone who might be willing deal with it. Steve

1 year, 5 months

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Tektronix 4404

by adambillyard＠googlemail.com

Hi everyone, I've been restoring a couple of Tektronix 4404 here in the UK. (68010, 2M RAM / 8MB virtual, 1024x1024 display, C & Smalltalk-80, runs on Uniflex) Having got past the physical restoration and using David Gesswein MFM board in place of the Micropolis HD, I've been diving into writing software. Its been a fun - if sometimes frustrating - project. There are no docs beyond some vanilla CRT + (incorrect) graphics calls. In particular nothing on the network stack.. (Figured out executable file format) and wrote a Uniflex to ELF file format converter so I can load stuff into Ghidra to analyze. Code here: https://github.com/Elektraglide/tek4404 I've managed to write a DHCP client and telnetd and port uemacs and have a (kinda) working window system written from scratch in C. Pic here: https://miro.medium.com/v2/resize:fit:1280/format:webp/1*a8PNwQ9g_3S27AxlWS… All the networking seems to revolve around calls to ldiddle() and wdiddle() (no kidding!) These read and write kernel values in the absence of ioctl() Anyone here recall Network Research Consultant's network stack? There appears to be no way of making a broadcast socket. And of course I would love to hear from anyone who also has a Tektronix 4404

1 year, 5 months

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Livestream VCF Chat Sat. Nov. 11 at 6:30PM EST

by Jeffrey Brace

Join us live for VCF chat hosted by Jeff Brace with guests: Liza Loop, Cynthia Solomon, Brian Silverman and Margaret Morabito. https://youtube.com/live/WfsWVtey5Vk?feature=share <https://youtube.com/live/WfsWVtey5Vk?feature=share&fbclid=IwAR2zurhOrpYLyxa…> Streaming live on VCF's YouTube channel. We will talk about educational technology with vintage computers.

1 year, 5 months

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Installing DEC C on RSTS/E

by Paul Koning

Hi... I'm seriously rusty on official RSTS installation procedures. I'm trying to install DEC C using the C_V1_2.tap file from the bitsavers bits/DEC/pdp11/rsts directory. It's actually a TPC file, in spite of what the extension suggests. Once I supply the correct format, SIMH recognizes it and RSTS can see the tape contents. Then I try @[0,1]install c81. Point to the tape, answer the destination, and then it asks me for the "library" tape and complains when I give it the C tape again (labels don't match). So what is it looking for? Does anyone have the C installation procedure handy? paul

1 year, 5 months

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Announcement of VCFed warehouse closure & improvements

by Thomas G

Hello, After 18 years of acquiring artifacts, our warehouse is in need of reorganization, as well as major renovation work - climate control, roof repairs, etc. A total restructuring, inventorying, and refurbishment of the warehouse is planned to commence soon - some steps such as the installation of climate control have already been taken - however, planning this process is made difficult by the fact that a number of our members have their own personal belongings stored within, many without proper tagging or documentation as such. On January 1st, 2024, the VCF warehouse at Infoage will be closed for renovation and organization. During this time, no items will be permitted in or out of the warehouse bar those permitted *directly* by the VCF Warehouse manager - Thomas Gilinsky - during monthly repair workshops. As such, if you have any personal belongings stored within the warehouse, and would like to retrieve it, or have it tagged and set aside for you to collect later, please contact either me at thomas.gilinsky(a)vcfed.org, or Doug at douglas.crawford(a)vcfed.org. Please provide *verifiable* *proof* that the item you are describing is your possession. *ITEMS WHICH ARE NOT CLAIMED BY JANUARY 1ST, 2024 WILL BE ASSUMED TO BE THE POSSESSIONS OF VCF.* Donations to VCF will still be accepted during this time - we have other areas to store them while the warehouse is reorganized. Thanks, Thomas Gilinsky Vintage Computer Federation Warehouse Manager

1 year, 5 months

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"Linux like Unix" livestream Sat. Nov. 4, 2023 at 6:30PM EDT

by Jeffrey Brace

Jim Hall will be doing a livestream on VCF's YouTube channel: https://youtube.com/live/FpBnRk8oWLc We don’t give much thought these days to what “Unix” means. In 2023, most Unix systems are actually running some version of Linux, which includes modern tools and commands that were unthinkable when Unix hit the scene in the early 1970s. But some 50 years later, “Unix” still lives on. Jim will look back on Unix history and experience first-hand what it was like to use the original Unix. Unix 3rd Edition debuted in 1973, and he chose that version as my target. That’s transporting back in time by 50 years. He will talk about: * Terminal setup * FORTRAN66 program * nroff document * linenum program * For another example of using Linux like original Unix, read hist article on Sysadmin Signal: https://sysadminsignal.com/2023/06/19/run-linux-like-original-unix/ For more FreeDOS content, visit his website https://www.freedos.org/ Join hist project on Facebook https://www.facebook.com/groups/freedosproject/ Follow his project on Mastodon https://fosstodon.org/@freedosproject Thanks! Jeff Brace VCF National Board Member Chairman & Vice President Vintage Computer Festival East Showrunner VCF Mid-Atlantic Event Manager Vintage Computer Federation is a 501c3 charity https://vcfed.org/ <http://www.vcfed.org/> jeffrey(a)vcfed.org

1 year, 5 months

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Greaseweazle part 2

by Tony Duell

Well, I've got the Greaseweazle software to run, but I don't know why, which is hardly encouraging. Installing various Windows updates, downloading .dlls, and puting the latter in various directories changed the error messages but it never actually worked. But downloading the latest Greaseweazle software did, it ran first time. So no idea what I was doing wrong (maybe 32 bit .vs. 64 bit Windows applications?) I can now get the list of commands when I run gw.exe. And can get help on them using the -h option. I've not tried connecting a drive yet, but the software can find and talk to the board (the green 'activity' LED turns on). For example 'gw rpm' which is used to check the drive speed by timing the index pulses times out and gives a 'no index' error which seems entrely reasonable. However I am not sure if I'll be able to use it. There is one very important thing missing : DOCUMENTATION. The 'wikii' on github is ridiculously incomplete. There is no user manual or man pages. The software source in python (a language I've never used) has very few comments and is not clear at all. It's not clear to me exactly what all the options are for, and when to use them. -tony

1 year, 5 months

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Ultrix 11 installation and ZULU SCSI Disc Emulator

by hupfadekroua

Hi all, I tried several ways to get a working SCSI image to be successfully boote on a ZULU 2024 SCSI Emulator. 1. I do have an Image of an RZ25-E drive containing RSX11M Plus, which is booting properly. This is a raw dd based disc image of a SCSI drive. 2. I got a disc mage by Jacob, which is booting using simh, but not using the ZULU on a physical 11/73 3. I created a fresh installation of Ultrix 11 using simh 3.9.x creating a RD54 image which won't boot on the ZULU an the physical 11/73 4.. I created a fresh installation of Ultrix 11 using simh 3.9.x directly into a physical SCSI drive partition, created an image via dd which doesn't want to boot on the ZULU. Simh is booting properly from a dd image of this partition. 5. Simh is telling me in general using a (virtual) RQDX3 controller. Maybe the images created won't boot because of being created by the virtual RQDX 3 controller? How to create a raw disc w/o any controller specific format - simply a plain Ultrix 11 image as a target for a SCSI drive to be booted either from the physical, or from a virtual (ZULU). Best Andreas

1 year, 5 months

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Tadpole/RDI UltraBooks - UNIX notebooks - species needs rescue...

by erik＠baigar.de

Hi there, in the last weeks my last two working UltraBooks died. Today I investigated the problem and obviously in these RDI made notebooks, the NVRAMs not only contain the boot information, the host ID and the MAC address but also the hardware configuration. Hence: Once the NVRAM is completeley dead, absent or replaced, the unit will not start up any more - it gets stuck in the power on test BEFORE the screen shows any information. Do anyone out there have got UltraBooks or UltraBooks IIi up and running? Would highly be interested in a dump of the NVRAM/Timekeeper!!! The failed first generation UltraBook are (DS1643 NVRAM): (*) U20-14-9-512P with three (!!) hard drives, no battery port (*) U20-14-3-128B two hard drives, battery port And my beloved UltraBook IIi (TimeKeeper DS1553-070) (*) U40-14-1X-1024C one harddrive, battery port and creator graphics. Reply here or PM erik(a)baigar.de, Thanks ''~`` ( o o ) +--------------------------.oooO--(_)--Oooo.-------------------------+ | Dr. Erik Baigar Inertial Navigation & | | Salzstrasse 1 .oooO Vintage Computer | | D87616 Marktoberdorf ( ) Oooo. Hobbyist / Physicist | | erik(a)baigar.de +------\ (----( )---------------------------+ | www.baigar.de | \_) ) / +----------------------+ (_/ So advice to all owners: Backup your NVRAM contents and I'd be more than happy to get in touch with you! Not affected seem to be the PrecisionBooks (e.g. H16-12-8-512L2, two hard- drives and battery port) as they do not contain an NVRAM/TimeKeeper.

1 year, 5 months

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Re: Looking for NORTRONICS Read/Write head for IBM 5100/5110/5106 tape unit

by Mark Perullo

Hey Steve I know this is a year later but I have the Nortronic Read Write heads you were looking for. They are currently on eBay. The listing is below. Just do a search and they will come up. Nortronics Magnetic Head Assembly. NOS Part 9164-0068. Radio Cart Machines. Hope this helps. Mark Sent from my iPhone

1 year, 6 months

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gunkies.org - ultrix-11 installation example ...

by hupfadekroua

Hello all, is there any source known how and where to get the floppy images used in the Ultrix-11 installation example? Best regards

1 year, 6 months

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PDP 11/40 power supply question

by Marc Howard

Hi, I have a PDP-11/40 that I've wanted to restore for many years now. I got it in the standard 21" cabinet but the power supplies were in a cardboard box. I'm not certain how the power supply bundle mounts in the cab. Also I'm missing the power supply cables. Do they use currently available Molex connectors? Could someone on the list perhaps take a picture or two to show me how the supplies are supposed to mount in the rack? Also, a shot of the power cable routing would help. Thanks, Marc Howard

1 year, 6 months

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Re: PDP 11/40 power supply question

by Kirk Davis

I have a 11/35 buried in my garage. Contact me off list if you’re unable to find what you need and I’ll get you some pictures. Kirk Sent from my iPad > On Oct 21, 2023, at 12:55 AM, Marc Howard via cctalk <cctalk(a)classiccmp.org> wrote: > > Hi, > > I have a PDP-11/40 that I've wanted to restore for many years now. I got > it in the standard 21" cabinet but the power supplies were in a cardboard > box. I'm not certain how the power supply bundle mounts in the cab. Also > I'm missing the power supply cables. Do they use currently available Molex > connectors? > > Could someone on the list perhaps take a picture or two to show me how the > supplies are supposed to mount in the rack? Also, a shot of the power > cable routing would help. > > Thanks, > > Marc Howard

1 year, 6 months

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PDP11 and Ultrix 11

by hupfadekroua

Hello all, does someone have a SCSI disc image of Ultrix 11 for a QBus based (11/73) PDP11. A.

1 year, 6 months

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Fw: Re: 11/15, 11/20 systems and parts, more

by ED SHARPE

Sent from AOL on Android ----- Forwarded Message ----- From: "ED SHARPE" <couryhouse(a)aol.com> To: "linimon(a)portsmon.org" <linimon(a)portsmon.org>, "Ed Sharpe" <couryhouse(a)aol.com> Cc: "Mark Linimon" <linimon(a)portsmon.org> Sent: Thu, Oct 19, 2023 at 8:29 PM Subject: Re: [cctalk] Re: 11/15, 11/20 systems and parts, more I have one pdp 11/20 aith procesdor abd ore untested in the garage have not taken for display at our museum. If you had something we likedre it could be yours Want hp 3000 series 2 or 3 Hp 2883 or 2884 disc or 2888 disc (plus some other stuff) A nice large early stash of historic semiconductors Early wireless( as in radio no routers!) Anything related to mccarty wireless telephone of San Francisco Related things to Francis or Ignatius mccarty ERly DeForest radio equipment. Exotic hp computers There us a few areas Nike missile Related hardware etc Thanks ed sharpe archivist f or smecc museum Sent from AOL on Android On Thu, Oct 19, 2023 at 5:02 PM, Mark Linimon via cctalk<cctalk(a)classiccmp.org> wrote: I sincerely doubt I could afford a PDP-11/20 but I still have nostalgia for the first machine I used at university. So I have to ask. mcl

1 year, 6 months

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Tandy Model 6000 w/XENIX

by Bill Gunshannon

Is there anywhere I could go where people who are playing with this system hang out? I used to have a couple of very early Model 16's and ran Xenix on them. I also worked with a couple of 6000's in a real production environment. Lately I got interested again and found an emulator that does a real good job and a bunch of rather interesting software for it. Some that wasn't around when I was doing this for a job. In one case, the package has a note that while it installs they couldn't get into it because the first thing it did was ask for username and password. Well, I figured out how to get into it and maybe there are others interested. It's nice to be able to see how real work was done back in the day. I have always wished some of the production software for the PDP-11 had survived, but at least this is a start. bill

1 year, 6 months

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Livestream 10/21/23 - Liza Loop, Byron Stout, Wil Lindsay & Jim Hall - VCF's YouTube channel

by Jeffrey Brace

This Saturday, Oct. 21, 2023 at 6:30PM EDT, we will livestream to VCF's YouTube channel (https://www.youtube.com/@vcfederation) a talk with Liza Loop, Byron Stout, Wil Lindsay and Jim Hall. We will be talking about Educating today's children with vintage computers. We will take questions from the chat part of YouTube. Future livestreams: 11/4 - Jim Hall - Linux like Unix 11/11 - Liza Loop, Cynthia Solomon, Brian Silverman & Margaret Morabito - Educating students with vintage computers over the decades. I hope to see you there!

1 year, 6 months

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PDP11 Dilog SQ706a SCSI Controller

by hupfadekroua

Hello all, are there some experiences to install as well as to configure a Dilog SQ706a QBus SCSI controller in a PDP11/73 successfully? The controller in question is working properly, that's executing the self as well as the host DMA connection tests successfully. The format procedure of a physical and of an emulated SCSI drive will be executed with success also. But how to configure the Dilog SQ706a as well as the 11/73 properly, so that the SCSI drive can be accessed as DU0. I'm using an SCSI RSX image on a ZULU SCSI emulator inherited from an 11/73 running successfully using a native DEC SCSI controller. I don't find any successful procedure on the web beside the manuals on bitsavers, which only can be seen as examples. A.

1 year, 6 months

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M7846 RX11 Unibus floppy controller board documentation?

by Tom Hunter

I was unable to locate schematics and/or a maintenance manual for the Unibus M7846 RX11 floppy controller board. If anyone has these could you please scan them and make them available. Thank you. Tom

1 year, 6 months

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IBM 5100 discussion

by Christian Corti

I have been pointed to the following discussion https://forum.vcfed.org/index.php?threads/ibm-5110-initial-info.1224000/pag… There, voidstar78 was apparently trying to contact me. Since my mail addresses are all functional (noone else had any problem with them, be it my personal or our museum's address), I wonder what he did, and I don't have a gmail address. I'm not on this forum, and I don't want to register to "yet another forum", so I can't even look at the pictures. But it seems to have been an interesting discussion. Pity it wasn't on this list. Christian

1 year, 6 months

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Re: IBM 727 tape drive

by Len Shustek

At Mon, 18 Sep 2023 10:55:13 +0200 (CEST) Christian Corti <cc(a)informatik.uni-stuttgart.de> wrote: >as it will be soon of importance to us, I am seeking for the systems >engineering manual and drawings, well, everything about the IBM 727 tape >drive (not the 729!). I especially need the module locations charts and >the module schematics. Just a few weeks ago I donated to the Computer History Museum a set of 14 original IBM black binders of "Type 7xx" manuals from the 1950s, including the 727. That one is likely to be the same as what's on bitsavers, but since it's no longer in hand I can't check. They probably haven't made it through the CHM cataloging process yet.

1 year, 6 months

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Obsolete Parts.... Unicorn Electronics

by D. Resor

I recently had a need for BC308 transistors. Of course those have been unobtanium for quite some time. My search beyond a distributor then went to eBay where I found Unicorn Electronics. More to the point I see from their website Apple 1, Apple ][ and Apple 1a Kits along with Apple 1 and Apple II parts are available. I thought some here might find this useful. https://unicornelectronics.com/ Don Resor

1 year, 6 months

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Re: VT100: Failing 2114 Chip Replaced With One With The Same Fault

by Rob Jarratt

> -----Original Message----- > From: wrcooke(a)wrcooke.net <wrcooke(a)wrcooke.net> > Sent: 08 October 2023 04:15 > To: rob(a)jarratt.me.uk; Rob Jarratt via cctalk <cctalk(a)classiccmp.org> > Subject: Re: [cctalk] VT100: Failing 2114 Chip Replaced With One With The > Same Fault > > > > > On 10/07/2023 5:35 PM CDT Rob Jarratt via cctalk <cctalk(a)classiccmp.org> > wrote: > > > > > > I find this really hard to explain. It can't be the chip selection > > logic because then the addresses 0x2400-0x2407 would also fail and I > > checked the CS signal with the logic analyser just to be sure. I also > > checked the address lines directly on the RAM chip for any stuck bits > > and they seemed fine too. > > > > > > > > What are the chances of two 2114 chips failing at exactly the same address? > > Is there some failure mode I might not be considering? > > > > Rob > > Perhaps it isn't the 2114 or its associated circuit at all. Maybe some other > device is being incorrectly selected by that address and driving (half) the bus > low? Just a thought. Many thanks for the suggestion. This hadn't crossed my mind, so I checked. All the things that I could identify on the schematic that connect to the bus (UART, interrupt vector, flag buffer and modem signals) seem not to be enabled. I have looked at what is sinking the data bus, there is a buffer which seems to be OK and the 8251 PIC. The PIC is harder to check but I can see it is not selected and the input pins don’t appear to be shorted. Not really sure what else to consider. > > Will > > If you want to build a ship, don't drum up people to collect wood and don't > assign them tasks and work, but rather teach them to long for the endless > immensity of the sea. > > Antoine de Saint-Exupery

1 year, 6 months

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List of DEC boards - Offers invited.

by Rod Smallwood

Hi I have had so many inquiries for the boards on my list its difficult to respond to them all. Please make an offer for what you want. Allow an additional minimum of $50 for UK to US shipping I'll keep the offer list open for a few days. Rod Smallwood

1 year, 6 months

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VT100: Failing 2114 Chip Replaced With One With The Same Fault

by Rob Jarratt

I posted recently that I had identified a faulty RAM chip in my VT100 and having replaced it the terminal seemed to get further into the self test. After further analysis with the logic analyser I have realised that it is still failing the RAM test, despite an apparent change in behaviour. I think the change in behaviour could be simply due to the slightly suspect keyboard cable. But here is the puzzle. When I first identified the faulty RAM chip if found that address 0x2408 would read back as 0x0A instead of 0xAA. I reckon this equates to E50 in the schematic, as it is the upper nibble of the second bank of RAM. I replaced the chip with one I bought recently. It turns out the self-test is still failing at the SAME address. I find this really hard to explain. It can't be the chip selection logic because then the addresses 0x2400-0x2407 would also fail and I checked the CS signal with the logic analyser just to be sure. I also checked the address lines directly on the RAM chip for any stuck bits and they seemed fine too. What are the chances of two 2114 chips failing at exactly the same address? Is there some failure mode I might not be considering? Thanks Rob

1 year, 6 months

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Re: How were 32-bit minis built in the 70s/80?

by Geert Rolf

Quote: > I could be remembering incorrectly but I think the Gould PN6080 mini we had exclusively for third year > comp sci at Macquarie Uni in the mid/late 80s was 32-bit made up of AMD2900 family logic (2901 ALU's). Find attached two pages of the CPU drawings of a Concept 32/67 and PowerNode 6000. Here the AMD 2901s show up. You remembered correctly! Geert Rolf owner of a PowerNode 6040 -- see https://geerol.home.xs4all.nl/DownLoad/UTX-paper.pdf

1 year, 6 months

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What happened to the PDP-8 on ebay?

by Bill Degnan

There was a PDP-8 (rack straight 8 with asr33) that was on ebay that disappeared..anyone know if it was sold? I can't find it, maybe the seller pulled the auction to sell privately. Bill

1 year, 6 months

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GEAC

by Bill Gunshannon

Here's a question for all our Computer Museum curators. Have any of the old GEAC Library systems ever been salvaged and put into a museum? They were curious boxes and I think would make a nice addition to a collection. bill

1 year, 6 months

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Microcom S-64 8085 system

by Wouter de Waal

Hi all I re-discovered some eurocards I found in a box at a swapmeet long ago. It looks like a complete 8085 system. Lots of RAM, 2K EPROM, I/O, FDC. The strange thing is that the EPROM is mapped at F800, the code in there looks like 8085 code, and looks like it wants to live at F800. And there's RAM at 0000. The DIN41612 A/C 64 pin bus has provision for 16 bits data. Pics here http://retro.co.za/8085/Microcom/ Anyone maybe have more information on this? I'm curious. W

1 year, 6 months

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Soviet tube/transistor/IC spec source

by Shoppa, Tim

For those working with ex-Soviet equipment from the 60’s and 70’s here’s a remarkable resource: https://www.govinfo.gov/content/pkg/GOVPUB-C13-6925b02fb6dcaa88935be001eb55… I am astonished that I found it in this in the US National Bureau of Standards (today NIST) archives 😊 Tim N3QE

1 year, 6 months

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The World Wide Web

by Murray McCullough

30 years ago the World Wide Web came into public existence. It has enabled cctalk to flourish. Murray 🙂

1 year, 6 months

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Possible DC012 Control Chip Fault on a VT100

by Rob Jarratt

I have my faulty VT100 now passing the RAM test, but it is still not producing any output to the screen. Looking at the DC012 chip it seems to be permanently asserting the interrupt line and not generating any DMA HOLD REQUEST signals. It seems that all the clock inputs are running (DOT CLK, CHAR CLK, VERT RESET). Unless there are other clock inputs not shown on the schematic, I think this suggests that the DC012 is faulty. Does anyone know of any other reason why the DC012 might behave this way? Anyone have a spare DC012 chip? I have posted a bit more detail here: https://robs-old-computers.com/2023/10/01/vt100-ram-fault/ Thanks Rob

1 year, 6 months

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Re: Microcom S-64 8085 system

by Wouter de Waal

Hi Tony and all >It might have run CP/M (which will run on an 8080, and therefore on an >8085). That needs RAM at location 0000 [1]. I know of CP/M, I even used CP/M (on my Apple) but I did not know it needs RAM at 0000. That's kind of strange, since everything that ran CP/M (OK, everything -80) has vectors at 0. I guess there was a reason behind it. I see the CPU board has a jumper "F000/F800" so I guess it does something to map that address to 0 after reset. W

1 year, 6 months

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Documentary on the SKALA computer of Chernobyl Nuclear Power Plant

by Sellam Abraham

This is a pretty interesting documentary describing the computer (SKALA) that ran the Chernobyl nuclear complex. https://www.youtube.com/watch?v=ZbaptQh2AM4 Sellam

1 year, 6 months

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Shelves / Rails for DEC Racks Questions

by Jay Jaeger

I have some open slots in some of my racks. I do have some old DEC rails, but I have a fair amount of equipment, from both DEC and other manufacturers, for which those rails are not suitable. Does anyone have any specific recommendations for shelving? (where equipment could just be slid on top of, if the equipment isn't too wide - some pieces are very close to 19 inches all by themselves, and were designed for front cantilever style mounting.) Would also be interested in specific recommendations for the following: DEC VR14 (I have one on a PDP-12 with proper rails, but have another to mount and don't have proper rails for it) HP 88780 (Perhaps a shelf is the best bet for these?) JRJ

1 year, 6 months

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VCF Swap Meet - Wall, NJ - Oct. 28, 2023

by Jeffrey Brace

Same place as last year in the big parking lot across from Brookdale and down the street from InfoAge Science and History Museums. We have Southern Monmouth County Firehouse museum selling food and drinks in the middle. This is a fundraiser for both museums (VCF and Firehouse museum) which are both part of InfoAge. All the info is here: https://vcfed.org/vcf-swap-meet/ Thanks! Jeff Brace VCF National Board Member Chairman & Vice President Vintage Computer Festival East Showrunner VCF Mid-Atlantic Event Manager Vintage Computer Federation is a 501c3 charity https://vcfed.org/ <http://www.vcfed.org/> jeffrey(a)vcfed.org

1 year, 6 months

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Re: Free Fujitsu M2444 6250 BPI tape drive

by Len Shustek

The drive is saved from the landfill! It was picked up by a classic computing fan at noon this morning. (And yes, it is Pertec-compatible.)

1 year, 6 months

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Theory of operation of DEC H7441 regulator?

by Tom Hunter

The DEC H7441 regulator is a relatively complex circuit using 2 x 555 timers, 2 x LM301 op-amps, 2 x transformers and 2 inductors I am struggling to understand how it is meant to work and was hoping to find a maintenance manual for it. Could anyone with such a manual please help? Alternatively is there another explanation of the operation of this or similar types of circuits? The circuit implements a switch mode supply. One of the two 555 timers operates as an oscillator, the second I think operates as a monoflop with the pulse length controlled via one of the LM301s. Overall the circuit seems very complex and while I understand parts of it, other parts are mysterious. In particular the top left section around Q1/Q2/Q3 and T1/T2 and E3 is most confusing. I did not find anything remotely similar in "The Art of Electronics" from Horowitz & Winfield. The H7441 schematics are available from here: https://deramp.com/downloads/mfe_archive/011-Digital%20Equipment%20Corporat… Thanks for any help or suggested reading material. Tom

1 year, 6 months

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