- test-drb@ccmp.vtda.org - classiccmp.org

by tomj＠wps.com

I'd like to solicit suggestions for a mini... I have this Nova 4, http://wps.com/NOVA4, but it's taking up too much space, physical and psychic. I do want a mini-era machine, and after some thought, I worked out what I'd like to get from one. What I want is a basic stripped machine, with CRT console and high-speed paper tape reader, and a low-speed punch (this last is variable), and standlone utilities. It must have a front panel. I've used such on two platforms (Varian 622/i, Nova 1200) and it's precisely the sort of (relatively) low-maintenance, high-geek vintage experience I want. So I'd like to trade my kilopound of DG gear, documentation, tapes, fiche, etc for about 100 lbs of minicomputer. I'd prefer a DG Nova, General Automation, Varian, or other non-DEC brand. (No offense to DECcies, I have a strong preference for off the beaten path.) Even or especially one-off oddball or unpopular, or slow, or ugly machines. Off models, step-cousin machines etc. Poorly optioned (eg. math or fancy interfaces). Something like (but of course unlikely to be sucha popular model): Nova 1200 16 or 32k words tty port ptp/ptr port lpt port or equiv I have generic high-speed paper tape readers, serial interface. I don't care if peripheral brands match. It would be nice to have reel tape support. Any suggestions on interesting and obtainable machines?

20 years, 11 months

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Circuit Cellar TI-74 article

by Richard.Cini＠wachovia.com

All: Does anyone have a copy of the April/May 1991 issue (Issue #20) of Circuit Cellar and can scan an article for me? There's an article on using the TI-74 BASICCALC for data acquisition and control. The article, written by Ed Vogel, appears beginning on page 41. TIA. Rich

20 years, 11 months

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OT: Older Color Laser Printer Repair or replacement.

by zmerch＠30below.com

=-=-=-= Of course: replies offlist, please!!! =-=-=-= Anyone here know boatloads about older color laser printers? Well, it's almost ontopic - the printer's 7 or 8 years old, IIRC, and it's got plusses for 'kewl-factor'. ;-) Well, it *used* to... see below. I have a QMS MagiColor 2 (CX engine) with lots of extra goodies: 112Meg RAM, 2G SCSI hard drive, *serial port*, Ethernut... and the thing just started going to Hades in a handbasket. It's always been a little flaky with paper handling, but otherwise has been ultra-reliable if you knew it's paper quirks. Now it's durned near impossible to deal with... but that's not the *big* problem. The nearly new black toner cart (less than 1000 sheets of it's 10000 sheet life) is now 'low', the nearly new magenta toner cart ( less than 500 sheets) is *out*, and I had to hack up a cyan cart with the magenta 'code insert thingy' to fool it into printing again (if any toner goes 'emtpy' the printer refuses to print) and the nearly new OPC belt ( less than 2000 of a 30000+ page lifespan) has developed several bad spots. All this seemed to happen within 100 pages or so. :-O Is the printer worth saving, or should I just drop it off my deck (10 foot drop - would be quite satisfying to see, after I strip the HD and memory out of it...)? Or does anyone want it for parts for cost of shipping? (Warning: it's a 110+ pound beastie; it would *not* be cheap to ship.) If it's not worth saving, anyone have experience with a good color laser printer? Preferably < $1000, and I want *bitchin* paper handling (read: no paper jams). Please don't say HP. ;-) The best I've found during my research so far is the Ricoh Aficio CL2000N - about $560 street price, and has oodles of options available (most of which I don't need), affordable consumables, and supposedly really good paper handling, according to the reviews I've found. Oh, and about 1/2 the weight of my current printer. Sorry for the offtopicness, but I don't know where else to turn, and I'm looking for advice from people I trust. ;-) Thanks, Roger "Merch" Merchberger -- Roger "Merch" Merchberger -- SysAdmin, Iceberg Computers zmerch at 30below.com Hi! I am a .signature virus. Copy me into your .signature to join in!

20 years, 11 months

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Homebrew Circuit Boards: Methods? Supplies?

by Steven_R_Hutchins＠Raytheon.com

DIY is fun, but try this site for pc boards. $88. for quantity 2, double sided boards, 4 day turnaround $122 for quantity 2, 4 layer boards, 4 day turnaround Same price up to 85 sq. inches. High quality boards. Just make sure you follow the rules for the "No touch" price, because they send you exactly what your Gerbers contain. |---------+-----------------------------> | | Roger Merchberger | | | <zmerch at 30below.co| | | m> | | | Sent by: | | | cctech-bounces at cla| | | ssiccmp.org | | | | | | | | | 09/07/2005 12:58 | | | PM | | | Please respond to | | | "General | | | Discussion: | | | On-Topic Posts | | | Only" | | | | |---------+-----------------------------> >---------------------------------------------------------------------------------------------------------------| | | | To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> | | cc: | | Subject: Re: Homebrew Circuit Boards: Methods? Supplies? | >---------------------------------------------------------------------------------------------------------------| Rumor has it that Jeff Walther may have mentioned these words: >I imagine this topic has come up before, so my apologies in advance. > >Do folks have a recommendation for suppliers of circuit board making >materials, or a good source of such information? I got my stuff at http://www.circuitspecialists.com/ Best prices & selection I could find and they have 1/16", 1/32" and 1/64" thickness pre-sensitized photoresist boards. They even have "how-to" books for beginners on making photoresist boards & whatnot. http://www.circuitspecialists.com/prod.itml/icOid/7783 (Link to the beginners book I mentioned - I bought it and it's a very good read.) I have not yet had time to build the projects for which I purchased my shiznit, but I should be able to before Xmas, so I'll know a lot more soon... ;-) I am not affiliated with the company other than being a (so far) satisfied customer. >In fact, I have not been able to find precoated board (photoresist coated) >in the .050" thickness. So I will either need to use a liquid photoresist >or try a toner transfer system. I dunno about 0.050", but would the 1/32" thickness be close enough? (That's 0.03125" thickness, if you can believe the Winders calcaputer applet ;-) >That raises other questions. Are the Toner Transfer Systems reliable No. Especially since the toner xfer systems were designed around toner that melts around 300 deg. C... a lot of the 'microfine' toner printers melt their toner a *lot* hotter than that, and don't get good adhesion to the xfer sheets. (Most laser printers made in the last 5-8 years are all microfine toner - anything 600dpi+ will be.) The last time I tried (5+ years ago) I used 10 sheets to *finally* get one that didn't require metric buttloads of touchups with a resist pen. >If the TTS is not servicable, then I'll try the liquid photoresist. I'd say to try pre-sensitized... but that's just me. > Would it be better to simply spray on, or should I try to rig a spinner? > >Do the developer and/or stripper usually turn out to be some commonly >(cheaply) available chemical? I would prefer to avoid paying $6+ for a >small bottle if I can avoid it. One kg of ammonium persulfate will make 4 liters of etchant, and it's around $18 USD (not including shipping) - not sure if you'll be able to find it much cheaper than that, but if you do, let everyone here know! ;-) The other chemical used is ferric chloride. Hope that helps, Roger "Merch" Merchberger -- Roger "Merch" Merchberger | A new truth in advertising slogan SysAdmin, Iceberg Computers | for MicroSoft: "We're not the oxy... zmerch at 30below.com | ...in oxymoron!"

20 years, 11 months

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DEC logic lab leads

by jack.rubin＠ameritech.net

I've reposted the image in "manual" mode for the luddites among us ;>) ! http://www.sideslip.net/dec_lab_leads/ Jack

20 years, 11 months

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Someone looking for help on HP 150, err code 0004

by sieler＠allegro.com

Hi, Can anyone help this user with an HP 150 problem: > But, I can't get past the pre-boot error message, > "Power-on test failed 0004" He's at: mwelch at redwoodalliance.org Apropos of his question, does anyone know of a list of HP 150 error codes? thanks, Stan -- Stan Sieler sieler at allegro.com www.allegro.com/sieler/wanted/index.html

20 years, 11 months

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Homebrew Circuit Boards: Methods? Supplies?

by trag＠io.com

>Date: Tue, 13 Sep 2005 06:52:29 -0400 >From: Steven_R_Hutchins at Raytheon.com >Subject: Re: Homebrew Circuit Boards: Methods? Supplies? >DIY is fun, but try this site for pc boards. >$88. for quantity 2, double sided boards, 4 day turnaround >$122 for quantity 2, 4 layer boards, 4 day turnaround >Same price up to 85 sq. inches. High quality boards. >Just make sure you follow the rules for the "No touch" price, because they >send you exactly what your Gerbers contain. Steven, You left out the URL, but from the description, I'd say you were writing about Sierra Proto Express. I've used them before with good results--both 4-layer protos and a batch of 200 boards from their regular service. However, the catch with the proto services is that they're all limited to .062" thick board and for this particular application, I need .050" board. That simple change in board thickness changes much of how one would normally get some simple boards made. I've even emailed several proto services to ask if they could do .050 as a proto, but they won't, which is understandable. Jeff Walther

20 years, 11 months

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a long shot...Wanted - Canon AS-100

by chrism3667＠yahoo.com

I may have posted this previously. Also *always* looking for other weirdo PC-incompatibles. Don't ask me for a list (right now anyway). If you got something and not sure, contact me. Moocho grassyass :). This and other *wierdos* can be viewed at www.old-computers.com if ya didn't know it. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

20 years, 11 months

2
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IBM PC hacking

by ajp166＠bellatlantic.net

I still have a AST 6pack pro in my collection of boards for PCs along with a Dimond trackstar128 (Apple][ in a PC). Never used either as they were collected long after their time. Allison > >Subject: IBM PC hacking > From: jim stephens <jwstephens at msm.umr.edu> > Date: Tue, 13 Sep 2005 17:06:49 -0700 > To: cctalk at classiccmp.org > >I saw an auction which reminded me of the days when the PC and XT >came out, but before clones or otherwise appeared, and before such >as AST were dominating the market. > >This auction is for a "zukerboard" 576K mem expansion. 6801436037. >I remember the hype for zucker that they were going to wreck the >market. > >The only reason this has any significance is that I believe this was one >of the >AST wannabe's, or even was larger than AST, pre the days when they >started making systems. > >I know of at least Zucker, Tecmar (marty tech, I don't remember marty's >last name, but he was some sort of PHD ohio type, I think). > >A number of companies were based here in Orange County, California, >and provided a lot of cheap stuff as they cratered, and the local >scrappers >got their. stuff and sold it off. > >Processor Technology (? I think) went big time and cratered. > >I remember a little shop here in Santa Ana which had the first clone of >the IBM PC. It was a single board which had 640k memory, allowed >using 64k memories, instead of the 16K memory that the PC and XT >earlier models used. > >It was called "Superboard" and was no relation to Supermicro, which >came much later. It had a bios that usually worked, but also had, >conveniently, a spot for up to 6 eprom chips, so you could put in a >PC bios if you could get a copy. > >The PC used either EProms, (16K I think) and the Roms that were >shipped with the BIOS were registered. The standard Data I/O would >not read them since they were not programmable, and needed their >output enabled to read the data. > >But once someone had them in the 2716's, it was easy to get them >running in your superboard. > >First systems had a 63 watt P/S, and IBM cards if you could find >them for video. Also there was no floppy controller on the first >board. > >Maybe others of you can recall expansion card makers, of such >things as serial, parallel, memory, floppy, then hard drive, etc. > >Jim

20 years, 11 months

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Various Macs for Sale

by vcf＠siconic.com

I have the following Macintosh computers for sale. These are mostly more recent models but there are some going back into the II series. All these systems are in anywere from good to poor condition, with the majority being in good condition. Most are complete, but I haven't looked inside, and I haven't powered up anything. Some are yellowed. Some are pristine. If you're interested in a particular model, ask and I can tell you the condition. In some cases there are multiple units of the same model, with the condition varying among them. Here's the deal: 1. $10 each plus shipping. 2. If you want me to inspect any system for any reason (other than reporting on general condition), add $10. 3. If you want me to test a system, add $25. "Testing" will consist of turning it on and seeing if it boots into an OS, or in the case of older systems with no internal hard drive, I'll turn it on and see if it goes "boop!" 4. Take the entire pallet (55 computers total) for $100 plus freight. The answer to all other questions follows this list of models available (number in parenthesis is quantity available): II Series IIci (2) IIsi IIvx (2) Quadra Series 610 (2) 605 (2) 650 (3) 950 Centris Series 610 (3) 650 (2) Performa Series 600 631CD (2) 636CD (2) 6115CD (3) 6116CD 6290CD 6370CD PowerMac Series 6100/66 (2) 6400/180 6500/250 7100/66 (3) 7100/66AV 7200/75 7500/100 (6) 8100/100 8500/120 (2) 9500/120 9500/132 (4) G3 (6) Misc Newer Technologies MAXpowr (240-266Mhz G3 Processor for NuBus) Newer Technologies Dt351c (2) The answers to all questions: 1. What ... ? I DON'T KNOW. Check http://www.lowendmac.com or justfuckinggoogleit.com. Feel free to cross-post this to the LEM Swap List. -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

20 years, 11 months

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Using SimOS to simulate a SGI MIPS IRIX environment

by RMeenaks＠OLF.COM

Hi, I am currently porting the INMOS iserver program to work with some more modern processors and also revamping it to be a lot more modular. I really don't have the space for any new machines currently, hence the reason for the emulator. As long as I can compile and have access to TCP/IP, I am set.... Thanks, Ram > system] (how's that for a run-on?)). Indys are cheap and small if you > want a nice 6.2 machine, I even have a r5k in the garage if > you want it > for free and are anywhere near Washington state. >

20 years, 11 months

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Using SimOS to simulate a SGI MIPS IRIX environment

by compoobah＠valleyimplants.com

Looked at that a few years ago- at that time it required a customized IRIX environment to run, and Stanford was only allowed to distribute the diffs against IRIX 5.3, and not 6.2. It looks like they now have 6.4, but again can't distribute- it depends what you want to do (I can't remember what your project is) but 5.3 is definitely a more proprietary UNIX than 6.2+ is in terms of requiring IRIX specific tweaks and oddities.The upside, of course, is that your program will run on R3k (which can only run up to IRIX 5.3, generally, some IPs max out at 5.2, and the earlier machines really like 4.0.5 or less, which is even weirder to code for, especially 3.x [NeWS-based windowing system] (how's that for a run-on?)). Indys are cheap and small if you want a nice 6.2 machine, I even have a r5k in the garage if you want it for free and are anywhere near Washington state.

20 years, 11 months

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RK07 cartridge, other "vintage" items, Wang "loopback" on Epay

by jwstephens＠msm.umr.edu

This vendor in new hampshire has an RK07 in this auction, 4131071126 , and some other "vintage" things that look to be of interest to collectors of the later model mini stuff. He has a huge pile that is of interest in general, if you can wade thru it all. Maybe he'll tell you about it on Skype. Jim

20 years, 11 months

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SWTPC Digi-Vista Nixie Clock

by ajp166＠bellatlantic.net

Top posted for brevity. Most equipment I've worked with run 160-190V for Nixies. Further my Yaesu YC-355D freq counter that I purchased in 1973 is nixie based and also uses around 170V. FYI: base logic is venerable 7490, 7475 and 7441 for the decades. For a simple PS to run nixies (and valves) I use a 6.3V CT 600ma or 1A To 117V mains transformer. They are common here in the USA and cheap. I drive them with a pair of bipolar power transistors in TO220 cases from 12V. Base drive for those transistors is derived from a squarewave source of two phases 180 degrees (555 and 7474 work fine) at 400hz or so (not criticial, higher makes filtering easier and less mechanical hum). The ouput can be rectified and filterd as needed (bridge or doubler is what I do depending on voltages needed). The voltage will be around 210V with a small load (10ma). If I need more power a heavier transformer with 3A or 5A 6.5V winding is used. Also if a stable voltage is needed sample the output and use that as feed back to a series pass feeding primary side power. That will regulate very well. I've built that many times and run many a HV device and even a CRT (D170 size) that required 1200V. For that I used a small 1A 10VCT:230V control transformer and a voltage multiplier and feedback for regulation. Works well. I prefer the driven style rather than self excited voltage converter as it's easier starting and has stable operation. It also doesn't require a special (hard to find or make) multiwinding transformer. the rest of the parts are also generally easily found in defunct stereos or even ratshack. Exotica and unobtainium is a pain. Allison > >Subject: Re: SWTPC Digi-Vista Nixie Clock > From: "Dave Brown" <tractorb at ihug.co.nz> > Date: Wed, 14 Sep 2005 09:59:02 +1200 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > > >----- Original Message ----- >From: "Tony Duell" <ard at p850ug1.demon.co.uk> >To: <cctalk at classiccmp.org> >Sent: Wednesday, September 14, 2005 7:35 AM >Subject: Re: SWTPC Digi-Vista Nixie Clock > >______________SNIP_____ > >Either way you'll end up with something over 300V DC >> >> -tony > >Worth pointing out that in general, you don't need anything like 300 >volts. Most nixies will run very well at no more than 120 volts HT >supply-and if you make your own drivers then 300 volt ( cheap and >readily available) transistors can be used. > >DaveB, NZ > > > >-- >No virus found in this outgoing message. >Checked by AVG Anti-Virus. >Version: 7.0.344 / Virus Database: 267.10.24/100 - Release Date: 13/09/2005

20 years, 11 months

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SWTPC Digi-Vista Nixie Clock

by allanh-cctalk＠kallisti.com

woodelf wrote: > I would have updated the high voltage power supply to a simple > transistor regulator. I have about 128 AC around here and that > can really give over voltage on 115 V transformers. > PS. Where do you find a 300 V transformer ... I may build one > some day. If you don't want to scrounge surplus stores, or wind your own, Hammond currently makes a couple that would work. They are the 269BX and 369BX, depending on whether you want "universal" primaries or not. Their high voltage secondaries are 300VCT, and they also have the 6.3V windings. They're a bit larger than necessary, being rated for 2-3 times the power called for in that design. allan -- Allan N. Hessenflow allanh at kallisti.com

20 years, 11 months

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DEC Computer Lab

by wacarder＠earthlink.net

>>> Dear Ashley, >>> >>> Yes, I have them. See >>> http://www.sonnet.be/dec/computerlab.htm >>> I can photocopy them for you, if you want. >> >> I'd also be interested in a copy of the "Computer Lab Teacher's Guide". >> (I have copies of the student workbook already.) >> >> Thanks, >> >> Vince > >Phillippe, > >I would like a copy of the teacher's guide too. Thanks for your offer >to photocopy. You can email me off-list at wacarder at usit.net. > >Thanks, >Ashley Phillippe, If you want to just make one copy, you can send it to me and I will copy it and send to the other folks here in the U.S. That will keep you >from having to pay for multiple shipments across the ocean. Ashley

20 years, 11 months

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HP2648A terminal

by jim＠g1jbg.co.uk

Hi, does anyone have a manual for one of these? It says graphics terminal on it, is it a vector terminal like the Tektronix units, or some other device? Thanks Jim. Please see our website the " Vintage Communication Pages" at WWW.G1JBG.CO.UK

20 years, 11 months

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DEC *Rainbow* stuph

by mtapley＠swri.edu

At 22:03 -0500 9/12/05, Chris wrote: >From: Chris M <chrism3667 at yahoo.com> >Subject: DEC *Rainbow* stuph >... >I recently obtained a Rainbow 100 with a gaggle of >disks. ... So where is the archive that has the DECUS stuph? ftp ftp.update.uu.se login as anonymous, use your email as a password cd pub/rainbow browse and enjoy. Hats off to the update maintainers, they rock! More generally, http://www.classiccmp.org/rainbow/files.html also rocks! Kudos to Jeff Armstrong for that one, and for being too modest to mention it in his reply (which I read after confirming the ftp address for update). -- - Mark 210-522-6025, temporary cell 240-375-2995

20 years, 11 months

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SimOS - emulating a SGI MIPS IRIX environment

by RMeenaks＠OLF.COM

Anyone try SimOS to emulate a SGI IRIX environment? I want to use this to continue with my porting initiative... http://simos.stanford.edu/ Thanks, Ram

20 years, 11 months

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DEC *Rainbow* stuph

by jba＠sdf.lonestar.org

The best place to find Rainbow software is ftp.update.uu.se under /pub/rainbow. Tons of software is available there. They appear to have a complete DECUS disk set archive, but there is other software there that I believe is not found in the DECUS disks. -Jeff -- Original Message: -- > From: Chris M <chrism3667 at yahoo.com> > Subject: DEC *Rainbow* stuph > To: cctalk at classiccmp.org > Message-ID: <20050908040212.48090.qmail at web61018.mail.yahoo.com> > Content-Type: text/plain; charset=iso-8859-1 > > I recently obtained a Rainbow 100 with a gaggle of > disks. The person had told me there was a complete or > nearly so set of DECUS disks included. None of them > imaged w/o errors, so I just became disgusted and gave > up. Now we know of all the semi-compatible peecees, > the Rainbow is probably the easiest to find software > for. So where is the archive that has the DECUS stuph? > And there is a set of DECUS newsletters on Ebay at > this very moment. jba at sdf.lonestar.org SDF Public Access UNIX System - http://sdf.lonestar.org

20 years, 11 months

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New Toy Message Resend

by jrkeys＠concentric.net

The following messages does not seem to get through. "First part of October I will be getting a custom build prom-programmer with software that programs and reads 2716's. And two Tektronix tube scopes, one >from 1954 and one from 1960. Also a prototype Commodore 64."

20 years, 11 months

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is it just me ? :-)

by brad＠heeltoe.com

Some day, before I die, I want to get everyone on this list in the same room (er, bar) and see all their faces, and the reactions on them, when someone starts a convertsation about a "tit mouse" :-) that just cracks me up. (did you ever see "bar fly"? Charles Bukowski is one of my heros) here's to everyone on this list! -brad

20 years, 11 months

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64 pin SIMM (Mac IIFX) Specs?

by trag＠io.com

>Date: Wed, 7 Sep 2005 18:37:39 +0100 (BST) >From: ard at p850ug1.demon.co.uk (Tony Duell) >> If the DIN and DOUT are common on the MB >My guess is that if they are linked, they will be linked by short tracks >near the SIMM sockets. And you'd be linking them with short tracks on the >SIMM PCBs. Considering that a light-nanosecond (in free space) is about 1 >foot, and that the velocity factor of a PCB is going to be around 0.6, I >would guess about 8" of length difference would give 1ns of timing skew. >I don't know how fast that amachine runs, but I would think you'd have to >have a right stupid layout for using both pins to matter much. Well, darn it, they aren't linked. It turns out that the memory controller on the IIfx buffers the writes, so that the CPU can go do something else after only 2 cycles instead of 6, unless, of course, the next operation is a memory access. So the the data lines from the SIMMs are routed to 74F573 D-type latches. It appears that the SIMM's DIN comes from the latches' outputs and DOUT goes to the latches' inputs. I have not confirmed it yet (must pull the PGA 68030 to get access to the data lines) but I suspect that the bidirectional databus goes to the input lines of the latches. So, on a read, the data would just come out of the memory straight to the bidirectional data bus. On a write the data bus would take data to the latches' inputs where it would be buffered, and the memory controller presumably has control of the LE (latch enable) and OE (output enable) lines to the latches. So, if I tied DIN and DOUT together, it looks like there are at least two potential trouble spots. 1) If the memory controller does not switch the latches to High-Z (OE inactive) upon completion of Writes, then on a Read, the data >from the memory would be in contention with the data still held by the latches from the previous write. 2) While the memory controller is buffering a Write, that data would feed back from the latches, along the tied together In and Out to the bidirectional data bus. So, for example, the CPU signals a Write. The memory controller takes over, and the data is buffered and held in the latches. The CPU is done in 2 cycles, but the MC will need 6 cycles total to complete the write. Now the CPU goes off to do something like an IO operation during which it will also need the data bus. However, because the In and Out pins are tied together, the bidirectional portion of the data bus is being fed the data from the previous Write operation for four more cycles while the memory controller completes the write operation. This will interfere with any other use of the data bus. So unless the data bus to the memory is seperate from the data bus to the rest of the computer, I believe that tieing the In and Out pins together will screw things up. Does my reasoning seem sound? What did I miss? Was that clear? Jeff Walther

20 years, 11 months

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Homebrew Circuit Boards: Methods? Supplies?

by trag＠io.com

>Date: Wed, 07 Sep 2005 12:46:20 -0700 >From: Marvin Johnston <marvin at rain.org> >Subject: Re: Homebrew Circuit Boards: Methods? Supplies? >To: cctalk at classiccmp.org >Message-ID: <431F438C.E21624B2 at rain.org> >Content-Type: text/plain; charset=us-ascii > > >> From: Jeff Walther > >> In fact, I have not been able to find precoated board (photoresist >> coated) in the .050" thickness. So I will either need to use a >> liquid photoresist or try a toner transfer system. > >Personally, I would avoid liquid photoresist and use dry film in its >place. You could contact Fred at Far Circuits >(http://www.farcircuits.net/) as he will supply boards precoated with >dry film photoresist. URL for supplies is >http://www.farcircuits.net/supplies.htm. According to the site, he will >supply 0.047 material laminated with Dupont PM115 photo resist film. Now he tells me?! :-) I'm already down the road with the uncoated .047" board. If that yields poor results I will try Far Circuits. Thank you for that source. I searched all over the place and never found that page. Sigh. Jeff Walther

20 years, 11 months

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64 pin SIMM (Mac IIFX) Specs?

by trag＠io.com

>Date: Wed, 7 Sep 2005 13:42:39 -0400 >From: "Teo Zenios" <teoz at neo.rr.com> >Subject: Re: 64 pin SIMM (Mac IIFX) Specs? >Are you planning on selling 16MB SIMMs or just making a few > for personal satisfaction? If I can make it work without being too big a pain, I'll probably sell some as well. There seems to be a strong (but small) demand >from folks who love their IIFXs. At this point I'm not even certain that I can make the circuit boards reliably and affordably. On the other hand, until a couple of weeks ago I couldn't even find .047" copper clad board. Finding a source of that is what got me going. Jeff Walther

20 years, 11 months

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VCF 8.0 Exhibitors

by vcf＠siconic.com

If you're going to exhibit at VCF 8.0 then now is the time to register your exhibit: http://www.vintage.org/2005/main/exhibit.php -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

20 years, 11 months

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Country conversion for HP 791x drives

by peterbrown10＠hotmail.com

Hi All, I'm trying to convert a couple of USA spec. HP 7914 hard drives to UK spec. This involves not only changing the input tappings from 110 Volts to 240 volts but also changing the main drive pulley and drive belt to compensate for 60 Hz / 50 Hz mains frequency difference. Machining up a revised (larger) pulley isn't a problem but finding the drive belt is proving difficult. Is there anyone on list that has the necessary parts (perhaps a scrapped drive in the UK)? I think that the parts are common for the 7911, 7912 and 7914 drives - the HP part number for the belt and pulley are - 07912-20013 (pulley) and 07912-40018 (drive belt). Does anyone have experience of these drives? The pair that I have are quite grubby on the outside, have probably been knocked about a bit in transit but have had the spindles locked and the head leaver in the 'locked' position - is it likely that they will still work? Peter Brown

20 years, 11 months

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Anybody live in Chile?

by gcarrick＠cse.uta.edu

http://search.ebay.com/_W0QQsassZalejoelectronicQQhtZ-1 Gil

20 years, 11 months

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VMS Question...

by bqt＠Update.UU.SE

On Sat, 10 Sep 2005 shoppa_classiccmp at trailing-edge.com (Tim Shoppa) wrote: > VAX6000 systems are probably the ultimate in over-engineering for > reliability and although they've got a lot fewer boards than a 11/780 > they still have some BI-bus contact reliability issues despite a > much slicker edge connector and less age. You haven't worked on the 86x0 systems, I can hear... The 6000 series are a joke in comparision. The 86x0 systems are designed to continue to work even when chips actually don't work. Those faults are logged, alternate signal paths are activated, and the board should be scheduled for replacement at the next normal PM. So yes, there are double sets of registers, paths, and whatnots, so that most faults actually don't stop the machine from running. Johnny Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at update.uu.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

20 years, 11 months

1
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Mass Memory Unit from Space Shuttle

by rigdonj＠cfl.rr.com

I found a pile of these things this morning. They are made by Odetics in Anaheim Ca. After I got home with them I realized that they are for the space shuttle. Does anyone know anything about them? I THINK they use a tape drive inside. I haven't opened one up yet but I saw the remains of a tape drive at the same place and I think it was the guts out of one of these. Joe

20 years, 11 months

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VAX 8550 & DEC available

by jwest＠classiccmp.org

I didn't want to post this, cause it wasn't on-topic & all according to some...Would someone be interested in a early 80's VAX 8550 w/peripherals? If someone is interested in the below please contact me off list. I may be interested in the TU/A81. I'm guessing from the sound of it that he doesn't have the computer console for the 8550. Jay West -------------------- I got this unit (and the others soon to be described) from a liquidation. Right now, I am more interested in moving them than making money on them. I would greatly prefer that someone pick them up rather than ship them but I will accommodate any type of shipping. Digital TA81 Digital TU81 Digital VAX 8550 Digital H8C40 SC008 - AC 64AMA-YE There are a few more items but I cannot find a serial number on them. They are cabinet-like like the VAX. Although there is one monitor, everything else is cabinet size. That means no manuals, disks or software that I can see. I haven't really dug into them to see what's in them. Everything is located in Chattanooga Tennessee. Thanks for the help. I would much rather a collector get these than selling them for scrap.

20 years, 11 months

5
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Manual TEAC MT-2ST

by birs23＠zeelandnet.nl

I just acquired a TEAC MT-2ST tape drive with an Genoa System QIC-02 ISA 8-Bit Adapter and was wondering if anyone here perhaps had a manual for either the card and/or the drive itself ? For your information, this drive is 5,25" in format and takes normal cassettes, thought it was a pretty nice find. Stefan. ------------------------------------------------------- http://www.computer-museum.net

20 years, 11 months

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Yes, I am a perpetual lurker (was: RE: is it just me ? :-))

by dzubint＠vcn.bc.ca

My personality is that of an introvert, so I tend to lurk here and "in the real world" too (I'm the quiet one in company meetings). I think I last posted on this list a couple of years ago (until today anyway). For the record, since I didn't respond to the previously mentioned age survey...I'm 42, married, got my B.Sc. in Computer Science in the 1980s, and I have a collection of VAX and PDP-11 systems in my basement that I power up regularily, and a random bunch of Radio-Shack, Commodore, and early IBM-Compatibles that I power up a few times a year, as well as a SIMH HP2000F system that I love to tinker with since it was the first system that I ever worked on back in the 1970s. (I'd love to have a "real" HP2000F, but I think my wife would object to any more stuff in the basement... SIMH & TS10 are a big help there) ...and I'm currently on a Mac mini running OSX 10.4 telnetted into a SUN system and using PINE to email this to the list! Thomas Dzubin Calgary, Saskatoon, or Vancouver CANADA

20 years, 11 months

2
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mouse nipples

by julesrichardsonuk＠yahoo.co.uk

The mouse cursor on this laptop (an aging Thinkpad) keeps on moving by itself - presumably the hardware side of it's the same on all laptops with a mouse nipple though. Anyone know if it's worth me trying to get underneath the keyboard to fix it (I assume it's a dirt-related problem) or is the problem more likely to be some sort of obscure software issue? (I have no idea when mouse nipples first appeared on laptops, but I imagine they're on topic just :-) cheers Jules

20 years, 11 months

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Fw: New Toy Coming

by jrkeys＠concentric.net

First message came back? ----- Original Message ----- From: "Keys" <jrkeys at concentric.net> To: "cctalk at classiccmp" <cctalk at classiccmp.org> Sent: Sunday, September 11, 2005 11:11 AM Subject: New Toy Coming > First part of October I will be getting a custom build prom-programmer > with software that programs and reads 2716's. And two Tektronix tube > scopes, one from 1954 and one from 1960. Also a prototype Commodore 64.

20 years, 11 months

1
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GPIB state machine info WTD

by philpem＠dsl.pipex.com

Hi, Does anyone happen to have any data on the GPIB state machine, or perhaps a GPIB slave interface implemented in LSTTL? I'm trying to rig up a CPLD to take some of the load off the microprocessor in one of my projects, but the GPIB is troublesome to say the least. I've got a copy of the HP "Tutorial guide to HPIB" and "PET and the IEEE488 Bus", but none of them cover the state machine... Thanks. -- Phil. | Acorn RiscPC600 SA220 64MB+6GB 100baseT philpem at philpem.me.uk | Athlon64 3200+ A8VDeluxe R2 512MB+100GB http://www.philpem.me.uk/ | Panasonic CF-25 Mk.2 Toughbook ... I may not always be perfect, but I'm always me.

20 years, 11 months

4
7
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SWPC Digi-Vista Nixie Clock

by swtpc6800＠comcast.net

I finished my Nixie tube clock. (My first try at this was around 1971.) http://www.swtpc.com/mholley/PopularElectronics/Dec1970/PE_Dec1970.htm I could not figure out how to wire the tens of hours module to the hours module. The magazine article was very vague and even misleading about that. So one night I sent an email to Gary Kay, the designer, and the next morning I had a response. How is that for tech support 35 years after the fact? Gary Kay later designed many of the SWTPC 6800 computer systems. http://www.swtpc.com/mholley/History/Gary_Kay.htm http://www.swtpc.com/mholley/BYTE/BYTE.HTM Michael Holley

20 years, 11 months

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SWTPC Digi-Vista Nixie Clock

by swtpc6800＠comcast.net

> I would have updated the high voltage power supply to a simple > transistor regulator. I have about 128 AC around here and that > can really give over voltage on 115 V transformers. > PS. Where do you find a 300 V transformer ... I may build one > some day. Also any options for a ALARM feature? Say a analog > bird chipring sound? I wanted to build an exact copy of what was in the magazines. I found all of the parts, some were slightly different. The MJE3055 power transistor came in a TO-127 package, The MJE3055T is now more common but comes in a TO-220 package. I made the board for the TO-220 package. (The TO-127 style cost me $15 the last time I needed one.) I got the Stancor PS-8416 (250 VCT) power transformer on eBay, two of them cost me about $25 including shipping. The seller, solderfume, has more for sale now, see eBay item 5807358404. I ordered boards for 3 units. I work with a guy who is restoring a 1957 Ford Panel truck that he got from his late uncle. This is a 3 or 4 year project. He doesn't understand why I restore TV Typewriters, 6800 computers and such. What good are they? Michael Holley www.swtpc.com/mholley

20 years, 11 months

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"rescue" from work- anybody need Apple IIe/II+/IIc Print Shop?

by compoobah＠valleyimplants.com

Pulled this out of a trash can yesterday- Broderbund's Print Shop for the Apple II+, IIe, IIc (and greater). In original blue box with the paper and envelopes inside, wohoo. I have no Apple II equipment, but I didn't want to see it junked, so does anybody want it? I'd like whoever wants it to consent to a "no-sale" agreement, since it came out of a school.

20 years, 11 months

2
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VMS Question...

by ajp166＠bellatlantic.net

> >Subject: Re: VMS Question... > From: Sridhar Ayengar <ploopster at gmail.com> > Date: Tue, 06 Sep 2005 17:15:34 -0400 > To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> > >Roger Merchberger wrote: > >>> Why don't you get a VAXstation 4000/vlc? It's one of the tiniest >>> pizza-box cases I've ever seen. >> >> >> Because for some that are tight on space, you still have a monitor, >> keyboard, possibly a mouse, a desk to actually stick it all on, etc. > >You don't need a monitor, keyboard or mouse. It's quite possible to run >one with a serial console, so if you have any machine with a serial >port, a terminal emulator program and a null-modem cable, you're in >business. I even skip that. Most of the 3100s (and uVAX in general) can be booted and run headless. So when I need to connect to mine I use a VT1200 Xterm over the network and I suppose a PC could be configured for that. That reduces the working system to a pizza box somewhere in the room on the network. Allison

20 years, 11 months

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PDP-8 in Volkswagen

by brian＠quarterbyte.com

Got it, thanks!

20 years, 11 months

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PDP-8 in Volkswagen

by aek＠bitsavers.org

A 2" image of it appears in "Images of America, Digital Equipment Corporation" on page 28 The picture is from the front cover of "On Line" Mar-Apr 1965

20 years, 11 months

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GPIB state machine info WTD

by dwight.elvey＠amd.com

>From: "Ethan Dicks" <ethan.dicks at gmail.com> > >On 9/9/05, Philip Pemberton <philpem at dsl.pipex.com> wrote: >> Hi, >> Does anyone happen to have any data on the GPIB state machine, or perhaps a >> GPIB slave interface implemented in LSTTL? > >TNW made a serial interface for the PET that did not contain a >microprocessor. Perhaps you could search for schematics on that. > >> I've got a copy of the HP "Tutorial guide to HPIB" and "PET and the IEEE488 >> Bus", but none of them cover the state machine... > >With that as a guide, if you don't find an existing state machine, >there's plenty of information to generate one of your own. You could >even prototype one in software. > >-ethan > > Hi As I recall, the GPIB chip made by TI ( forget the number ) had a data sheet that explained the states. Not much to it as I recall, mostly just handshake stuff and address recognition. It seemed like there was some timed stuff that might not work well in software but for the most part I'd suspect that Ethan is right, one could do it all in software. Dwight

20 years, 11 months

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PDP-8 in Volkswagen

by brian＠quarterbyte.com

Hi, First off, thanks to all who replied to my earlier question about the history of the CP/M BIOS. Now -- does anyone have a copy of the DEC magazine ad for the original PDP-8 that showed it in the back seat of a Volkswagen Beetle convertible? A high-res scan would be preferable, but whatever -- I can't find it using Google images. Thanks Brian =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- _| _| _| Brian Knittel _| _| _| Quarterbyte Systems, Inc. _| _| _| Tel: 1-510-559-7930 _| _| _| Fax: 1-510-525-6889 _| _| _| Email: brian at quarterbyte.com _| _| _| http://www.quarterbyte.com

20 years, 11 months

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more datasheets - 25S09?

by brad＠heeltoe.com

ok, how about a 25S09 ? anyone have a data sheet? it's a flip flop -brad

20 years, 11 months

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datasheets for 82S21 - Signetics 32x2 SRAM?

by dwight.elvey＠amd.com

>From: "Brad Parker" <brad at heeltoe.com> > > >Tony Duell wrote: >> >>My experience with simulators suggests that's a massive _underestimate_ >>of the time it would take. > >Well, I did manage to make a microcode simulator and it boots the lisp >machine. > >I think there are a few very subtle bugs in the pipe, however, and I >think the only way I'll find them is to watch the real hardware work. > >I think the timing on this machine, and the 74S/74LS parts it uses are >slow enough that verilog will do fine. In reality what I am saying is >not about verilog, but the accuracy of the models I have created. So, >restated, I think I can make models which are accurate enough for this >type of design. Hi Make the design race free. I'm not sure if I understand you statement about accurate. A NAND gate is a NAND function. Anything else is incorrect. I hope you are not trying to do timing verification with verilog modeling? Dwight > >heh. we'll see. > >-brad >

20 years, 11 months

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GPIB state machine info WTD

by Richard.Cini＠wachovia.com

If you can find it, get a ROM dump or listing from one of the floppy drives like the 2031LP disk drive or the 2040 dual-drive. The 2031 is a 1541-looking GPIB floppy drive for the PET. http://www.funet.fi/pub/cbm/firmware/drives/old/2031/index.html Here are the ROMs. Just run them through a disassembler and see what you get. I haven't located a memory map yet. -----Original Message----- From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Ethan Dicks Sent: Friday, September 09, 2005 2:53 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: GPIB state machine info WTD On 9/9/05, Dwight K. Elvey <dwight.elvey at amd.com> wrote: > As I recall, the GPIB chip made by TI ( forget the number ) > had a data sheet that explained the states. Not much > to it as I recall, mostly just handshake stuff and address > recognition. The common chips are: TI TMS9914A NEC ?PD7210 http://sine.ni.com/nips/cds/view/p/lang/en/nid/1267 > It seemed like there was some timed stuff that > might not work well in software but for the most part I'd > suspect that Ethan is right, one could do it all in software. One issue is to identify what GPIB devices you expect to talk to. Older ones, especially ones that implemented the protocol via ~1MHz 8-bit microprocessor, are unlikely to be able to handle 1MB/sec speeds that the newer "IEEE 488.2" devices can. If all you want to do is talk to old devices at a few KB/sec, it really doesn't matter if you have a hardware or a software implementation. For the newer, high-speed stuff, I'd expect you'd need an ASIC to pump the bytes through in a timely fashion. OTOH, even Commodore had a little fiddly hardware thing to handle handshaking turn-around. Andre Fachat mentions that in his extensive pages covering Commodore hardware and his own home-built mostly-PET-compatible 6502 computer. I do not know about the Commodore acoustic couple (C810?), but disks and printers tended to have 6502/6504/etc software implementation of GPIB. -ethan

20 years, 11 months

2
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Build a Functional Equivalent to the CDP1861

by jnugen＠one.woovis.com

I saw this article in the latest (Sept. 2005) 'Circuit Cellar' and thought some of you 1802 fans might find it interesting: *Replacing a Legend: *Build a Functional Equivalent to the CDP1861* */Bob Armstrong /Bob built a functional equivalent to a CDP1861 video controller chip so he could play video games on his COSMAC Elf replica. The design includes two ATF22V10 GALs and a few standard 74HC chips. Ready to replace some random logic? /p. 58/ -James Nugen

20 years, 11 months

3
2
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Heathkit ET-3400 red filter material?

by James＠jdfogg.com

> As I restore this ET-3400, I am curious if anyone knows what > kind of filter material Heathkit provided that sticks to the > TIL312 7-segment displays? Mine have 4 of 6 displays > covered, and 2 displays bare. It seems to be some sort of > adhesive red tape or film, but I have no idea what to use for > a modern substitute. > > Thanks for any tips. Two ideas come to mind - lighting gels, used in stage lighting, and Kodak makes lens filter gels in a huge range of colors. Both these items will appear to be colored sheets of plastic. In the case of the Kodak product, the "pass band" of the filter will be narrow and precise (an exact shade of a certain color and it won't pass much else).

20 years, 11 months

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Heathkit ET-3400 red filter material?

by dwight.elvey＠amd.com

>From: "James Fogg" <James at jdfogg.com> > >> As I restore this ET-3400, I am curious if anyone knows what >> kind of filter material Heathkit provided that sticks to the >> TIL312 7-segment displays? Mine have 4 of 6 displays >> covered, and 2 displays bare. It seems to be some sort of >> adhesive red tape or film, but I have no idea what to use for >> a modern substitute. >> >> Thanks for any tips. > >Two ideas come to mind - lighting gels, used in stage lighting, and >Kodak makes lens filter gels in a huge range of colors. Both these items >will appear to be colored sheets of plastic. In the case of the Kodak >product, the "pass band" of the filter will be narrow and precise (an >exact shade of a certain color and it won't pass much else). > > Hi One might try an auto parts store. The often have some tape to cover broken tail lights. Dwight

20 years, 11 months

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Cray board

by gcarrick＠cse.uta.edu

Do you have any information about the authenticity of this item on eBay? 5238346510 Gil A. G. (Gil) Carrick, Director The Museum at CSE University of Texas at Arlington Department of Computer Science & Engineering Box 19015, 471 S Cooper Street Arlington, TX 76019 817-272-3620 http://www.cse.uta.edu/TheMuseum at CSE/

20 years, 11 months

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Seeking Bay Area collectors...

by kyrrin＠bluefeathertech.com

Fellow techies, I've been asked, on behalf of a friend of mine (John Lanfri), who does not have reliable Internet access at this time, to assist in finding those interested in acquiring a goodly collection of DEC'ish (pre-HP, pre-Compaq) hardware, software, and docs, along with various other Classic-era stuff which has yet to be unearthed. This may, depending on what he's getting rid of at the time, include such things as a fully-loaded PDP-11/34 with all docs, including field service prints, RSTS/E, spare disks (RL02's), TU10's, etc. It may also include an 11/73, rebuilt tri-density 9-track drives (I don't recall if they're Fujitsu or NEC, but I do recall that they've not been used since being refurbed), SMD disk drives, large and small, and other goodies too numerous to list. This project is long-term. It is expected to take place over the course of the next six months to a year. An inventory will be generated within the next couple of months. Shipping will NOT be available. Period. This will be exclusively local pickup in the San Jose/Santa Clara CA area. WHAT TO DO FOR NOW: Along with the inventory, we're working on generating a contact list. If you're interested in being kept up to date on this project, and would like to be among those offered the opportunity to acquire, please indicate as much in a private E-mail note to me, and please include a contact phone number. Either John or myself will contact those interested with further details of what's become available at what time. PRICING: I can't speak for John, 'cause it's all his stuff, but I will say that he's not going to gouge anyone. He's indicated to me that he's more interested in getting the stuff to those who can appreciate and use it than he is in making a fortune from it. Pricing for each item, or set of items, will be shown on the inventory. Some items may be tagged as 'Make an Offer' (which you should also do if you don't like the price shown -- John is an astute bargainer). ;-) Again, please remember -- BAY AREA LOCAL, or those who would be willing to drive to San Jose/Santa Clara ONLY. Shipping will NOT be available, and you may need (at minimum) a pickup or flatbed truck for some items. This will be noted on the inventory if a given item or set of items warrants it. Looking forward to hearing from those interested in this. Thanks much. -=-=-=-=-=-=-=-=-=-=-=- Bruce Lane, Owner & Head Hardware Heavy, Blue Feather Technologies -- http://www.bluefeathertech.com kyrrin (at) bluefeathertech do/t c=o=m "If Salvador Dali had owned a computer, would it have been equipped with surreal ports?"

20 years, 11 months

1
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64 pin SIMM (Mac IIFX) Specs?

by trag＠io.com

>> If the DIN and DOUT are common on the MB >Well, darn it, they aren't linked. It turns out that the memory >controller on the > IIfx buffers the writes, so that the CPU can go do something else >after only 2 > cycles instead of 6, unless, of course, the next operation is a >memory access. > So the the data lines from the SIMMs are routed to 74F573 D-type latches. It > appears that the SIMM's DIN comes from the latches' outputs and DOUT goes > to the latches' inputs. Okay, what if I put a pair of octal tristate buffers on the SIMM and control them with the Write Enable line such that data can go from DIN to the DRAM chips' data pins when WE is active, and data can go >from the chips' data pins to DOUT when WE is inactive? Something like the SN74ABT541 looks like it might do the trick: <http://focus.ti.com/docs/prod/folders/print/sn74abt541b.html> I see two potential problems. First, the buffer will introduce about 4 ns (max) of delay between WE changing and data flowing, so timing might be dicey. Second, the timing will be even tighter, if the computer tries to do a Read Modify Write to memory. So one important question is whether the IIfx makes use of the Read Modify Write function of DRAM. Checking some old datasheets, it appears that that feature was present in old DRAM chips. Did computers typically make use of it? The tristate buffers are only about $.50 each, so they don't add much to the cost, but they might blow the timing. Jeff Walther

20 years, 11 months

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leads for DEC logic lab

by dwight.elvey＠amd.com

>From: "vrs" <vrs at msn.com> ---snip--- > >What I did was buy a set of mini-banana to regular-banana adaptors, >which I got a good deal on, and a bunch of stackable regular-banana >patch-cords, which were also inexpensive. ---snip--- Where? Pomona wants an arm and a leg for these. They have the mini banana's as well, for a price. I'm interested in a cheap source of regular banana patch cords and also dual mini connector plugs. Dwight

20 years, 11 months

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DEC fast reader/puncher M705, 710, 715 card schematics

by sonnet＠sols.ucl.ac.be

Hi, Does anybody have the schematics for the pre-1971 versions of these : M715 C reader clock Flipchip card, M710 D punch control Flipchip card, M 705 D reader control Flipchip card ? While trying to connect my PDP-8/L to the PC04 fast reader/puncher, I realized that the schematics for the M705, M710 and M715 card posted by David Gesswein http://www.pdp8.net/pdp8cgi/query_docs/queryb.pl?level=1m-series;id=689 did not correspond to the ones I have. These are late "F" versions (1971). These cards include several DEC9801 one-shot TTLs as well as 7475 TTLs. My cards are 1969 versions and have no 9801 nor 7475. My cards have been somewhat modified by the former owner of the PDP-8/L. I have to understand what he did in order to repair them (most cards have to be repaired because an overvoltage episode killed about one third of the TTLs in my PDP-8/L) ! Many thanks, Philippe .

20 years, 11 months

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leads for DEC logic lab

by jack.rubin＠ameritech.net

Here's a look at the leads for the logic lab: http://www.sideslip.net/dec_lab_leads/ They are basically mini-banana plugs. Note that they are stackable and have a "dec" logo molded on the side. Actual size of the plug is about 7/8" from top to tip; the plastic part is 1/2". If anyone has a spare manual, I'll trade a handful of leads for it! Otherwise, I'm in line with everyone else hoping for a good scan. Jack KC9HVE

20 years, 11 months

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Fwd: Information about CD-ROM in the library of Computer Museum

by jfoust＠threedee.com

I gave them access to my ftp archive, and directed them to this list and to Bitsavers, too. - John >Date: Thu, 8 Sep 2005 20:31:40 +0000 >From: asbesto <asbesto at freaknet.org> >To: jfoust at threedee.com >Subject: Information about CD-ROM in the library of Computer Museum > > >Hi, > >i'm Gabriele Zaverio, president of FreakNet MediaLab, an italian >association dedicated to preserve computing history and working >to create a Museum of Working Machines :) > >we're actually working on a Data General Eclipse MV/7800XP >running AOS/VS, a very particular Operating System. > >Our problem is the total lack of any manual. So, searching >the net, i caught this page: > >http://www.threedee.com/jcm/library/ > >in which i read: > >"Two CDs of 20,046 pages > I've made contact with a guy who's scanned 20,046 pages of the > docs listed below, at 300 to 400 DPI. I keep these on CD-R." > >well, i'm really interested in those CD! :) > >i think we can made a sort of exchange - here we have many kind >of manuals, from Honeywell DPS-4 and DPS-6, to PDP-11/34 >internal schematics (including GAMMA-11 TAC Camera), and >other manuals like DG/UX for Data General Eclipse... > >as our goal, we want to put online every kind of documentation >we have, and we started scanning something. > >About our Eclipse, we have some stuff here: > >http://zaverio.net/eclipse/stuff > >as documentation, howto's and tape images and backups of >some part of AOS/VS, including help files and man pages. :) > >can you help ? i see you CD-ROM contains very interesting >manuals that can help us running this machine (our goal >is to make it available for users for experimenting it :) > >please help us, and tnx in advance > >Gabriele "asbesto" Zaverio >FreakNet MediaLab / Poetry > >p.s. we're from Palazzolo Acreide, a little town in >Sicilia, Italy! :) > >-- >[ asbesto : IW9HGS : freaknet medialab : radiocybernet : poetry ] >[ http://freaknet.org/asbesto http://papuasia.org/radiocybernet ] >[ http://www.emergelab.org :: NON SCRIVERMI USANDO LE ACCENTATE ] >[ *I DELETE* EMAIL > 100K, ATTACHMENTS, HTML, M$-WORD DOC, SPAM ] > >

20 years, 11 months

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Vintage people: Google hires Vint Cerf

by news＠computercollector.com

http://www.wired.com/news/business/0,1367,68808,00.html?tw=rss.TOP ----------------------------------------- Evan Koblentz's personal homepage: http://www.snarc.net Also see: http://groups.yahoo.com/group/midatlanticretro/ Where did PDAs come from? http://www.snarc.net/pda/pda-treatise.htm *** Tell your friends about the (free!) Computer Collector Newsletter - 780 readers and no spam / Publishes every Monday / Write for us! - Mainframes to videogames, hardware and software, we cover it all - W: http://news.computercollector.com E: news at computercollector.com

20 years, 11 months

5
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Debugging the HP37201 HPIB Extender

by ard＠p850ug1.demon.co.uk

I think this is on-topic here, it is well over 10 years old, it contains a classic-type microprocesosr, and I suppose it could be classed as a peripheral for a computer system (it's more commonly used to do remote-control of test equipment, but...) Note that I have a circuit diagram for this unit, but no service manual, so I couldn't interpret the self-test LED patterns. But I sorted it out by thinking about what had to be going on... To cut to the end, would you believe _another_ dead 2114 RAM chip.... -tony > The HP37201 is a unit that allows an HPIB (GPIB, IEEE-488) bus to be sent > over a serial connection. It supports various forms of the latter, > including asynchronous and synchronous modems and twisted-pair cable. > > Physically, it's a 2U rackmount unit. To get inside, remove the top and > bottom panels with the captive screws at the back. The right side panel > can then be removed in much the same way. To get the left side panel off, > remove the 2 screws at the ends of the handle, the plastic covers under > them, and the handle itself. The panel then slides off towards the back > of the instrument. > > Inside there is one large PCB filling most of the case. It contains a > 6800 processor, 8K of frimware EPROMs (either 8 off 2708, 4 off 2716 or 2 > off 2732, sleected by soldered links on the board, mine has the middle > configuration), 1K of RAM in 2 off 2114, a 6850 async serial chip, a 6852 > sync serial chip 5 off 6821 PIAs (1 for the diagnostic connector and > front panel LEDs, one for the GPIB data lines, one for the GPIB > handshake/control lines, one for the internal configuration switches and > GPIB control, and one for serial control and handshake lines), GPIB > buffers, RS232 buffers, and a bit of TTL. The latter is mostly for the > encoder/decoder for the twisted pair connector, but of course there's a > little for the GPIB port, system address decoders, microprocessor address > buffers, etc. > > The PSU is on the same board, but HP have been kind to people like me who > like to test it on dummy (or no) load first. There is a 12 pin (6 pin > double-sided) edge connector on the PCB. Some of the pins go to the PSU > outputs, others carry the power lines to the rest of the machine. In > normal operation, a little jumper PCB (no components, or even soldered > connections) is plugged in there. It can be removed to test the PSU > without the rest of the machine conencted. Incidentally, the marked PSU > testpoints are on the PSU side of this connector, and are thus useful > when the jumper is removed. > > The only other things in the case are the mains transfomer and associated > input connector and power switch, and a 'DTR OFF' changeover switch that > connects the DTR pin on the RS232 connector either to the DTR buffer > output or to another buffer output that is permanently at -12V. > > There are 2 DIP switches and a rotary switch on the PCB. The latter > selects the transmission mode/baud rate and self-tests. > > OK, so what did mine do. Well, in the process of fully dismantling and > reassembling it (not to be recomended if you don't like fiddling tiny > nuts into even smaller spaces -- the connectors are all soldered to the > mainboard and have to be unbolted from the back panel to get the board > out), I'd removed the 3 fuses from the PSU section of the PCB. There's a > 3A fusr for the +5V line, a 0.5A fuse for the +12V line, and another 0.5A > fuse for both the -12V and -5V lines. I put them back in suitable places > and powered up with the jumper pulled. > > The +5V and -ve lines were fine, the +12V line was missing. I quickly > traced this to a blown fuse. Since I'd not seen it blow when I flipped > the power switch, I replaced it, the +12V line now came up correctly. > > I fitted the jumper and powered up again. The -ve supply fuse flashed and > failed. I suspect.actually, the fuse I had put in the +12V holder had > originally come from the -ve one, it had failed long before I started > fiddling with things. A bit of checking showed that there was a short > from the -5V line to ground, and that a 75110 buffer (line driver for the > twisted pair cable) was getting rather hot. I desoldered it, replaced the > fuse, and tried again. This time the fuse held, and the instrument should > work for other-than-TP links without this buffer. > > Alas it didn't seem to be working. None of the LEDs came on other than > the power light (which simply runs from the 5V line). Fiddling with the > CTS and DSR lines had no effect on the associated LEDs (note : The 'link' > is in software, the RS232 lines are read via pins on one PIA, the LEds > are driven by another). More worrying still, at least one of the PIAs was > not being initialised, a pin that drives a select input on a mux to set > the async baud rate [1] was left configued as an input. > > [1] The async baud rates are quite clever. The unit can officially do > 150, 300, 600, 1200 baud. The 6850 can do either /16 or /64 between the > clock input and the internal bit clock, so one clock input frequency will > do for 300 and 1200, half of it would do for 150 and 600. There's a mux > that selects the appropriate output of a counter depending on the state > of a PIA pin. There's also a soldered link that would appear to double > all the baud rates, I've not tried it yet. > > I twiddled the rotary switch and powered up again. Now the first > interesting thing was that in 2 of the self-test positions I did get some > front panel LEDs on. So the CPU was clearly running. It could do enough > to intialise the PIAs, read the configuration switches, and drive the > LEDs. I'd already pulled the socketed EPROMs and dumped their contents. I > couldn't be sure it was correct, obviously, but they looked sane. > > One of the test positions was clearly a memory test (I forget the > labelling). Now, for very good reasons, namely that they were 2114s, I > suspected the RAMs. Getting to them is not easy, they're at the very > front of the board, partly hidden by the front casting. So I had to get > that out of the way first. > > Disconnect the DTR OFF wires at the back of the PCB (note the order, they > are not marked on the PCB). Pull the cable through the grommet, undo the > 2 screws and nyloc nuts holding the cable clips to the right side > casting. Prise off the trim strip at the top of the front casting, remove > the 6 screws holding the front panel. Pull that forwards, remove the 2 > screws holding the mains swtich to the back of it, then remove the front > panel. Don't worry about the lack of the DTR OFF switch, you don't need > the DTR pin to sort out the memory. > > With the front panel out of the way, the front casting comes off with the > 4 corner screws.. > > OK, I desoldered the RAM, and fitted 18 pin DIL sockets. With no RAM > chips at all, I got a different set of LEDs on the memory test > (interesting, at least it was doing somethign with the RAM). Putting the > RAMs back gave the old pattern, putting them back the other way round > (swapping which chip stored each nybble) gave a different pattern. > > Had the RAM been working correctly, swapping them would have made no > difference of course. So it was likely I had a RAM fault. > > I found an old Apple 80 column card with some socketed 2114's on it. > Pulled a couple and put them into the 37201. Powered up. Got yet another > patten from the memory trst. The self-test now gave a patten of flashing > LEDs (test-complete alternating with all the others). The 'operating' > modes now gave a single LED on, which indicated 'remote signal lost' -- > not suprising as I had nothing connected to it. More usefully, the RS232 > handshake pins now did affect the frontpanel LEDs, the baud-select pin > from the PIA was now driven correctly. > > Trying the origianl RAMs back one at a time proved that only one was > dead. > > Still to do : Get a new 75110 driver chip for the TP interface. And > investigate the lowest hardware test, which doesn't even use the firmware > ROMs, with a logic analyser

20 years, 11 months

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leads for DEC logic lab

by wacarder＠earthlink.net

> On 9/8/05, Jack Rubin <jack.rubin at ameritech.net> wrote: >> Here's a look at the leads for the logic lab: >> http://www.sideslip.net/dec_lab_leads/ > >> If anyone has a spare manual, I'll trade a handful of leads for it! >> Otherwise, I'm in line with everyone else hoping for a good scan. > > I've been following the discussion because I've wanted one of these > since I saw the Teacher's Guide at age 13. What I'd love to see are > some internal construction details of the Logic Lab. Can anyone snap > a few shots? > > -ethan I'll take the back off one of mine some time and take some detailed pictures of the insides of the thing. Question: Is the Logic Lab the same thing as the Computer Lab? Mine are Computer Labs. Ashley

20 years, 11 months

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leads for DEC logic lab

by wacarder＠earthlink.net

> Here's a look at the leads for the logic lab: > http://www.sideslip.net/dec_lab_leads/ > > They are basically mini-banana plugs. Note that they are stackable and have > a "dec" logo molded on the side. Actual size of the plug is about 7/8" from > top to tip; the plastic part is 1/2". > > If anyone has a spare manual, I'll trade a handful of leads for it! > Otherwise, I'm in line with everyone else hoping for a good scan. > > Jack > KC9HVE Jack, The patch cables that came with my two DEC Computer Labs are not like yours. They are like Phillippe's and are not stackable. Maybe yours are a later version(?). Ashley

20 years, 11 months

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datasheets for 82S21 - Signetics 32x2 SRAM?

by h.j.stegeman＠hccnet.nl

Hi Tony, I have the complete datasheet of this highspeed RAM. Still need it ? Henk IBM collector. http://home.hccnet.nl/h.j.stegeman

20 years, 11 months

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VINTAGE COMPUTER FESTIVAL 8.0 NOV 5-6

by vcf＠siconic.com

A>PIP TTY:=VCF8.DAT ______________________________________________ / \ \ | | | \__/| * VINTAGE COMPUTER FESTIVAL 8.0 * | | | | NOVEMBER 5-6, 2005 | | COMPUTER HISTORY MUSEUM | | MOUNTAIN VIEW, CALIFORNIA | | | | HTTP://WWW.VINTAGE.ORG | | | | * * * | | | | AT VCF 8.0 YOU WILL: | | | | * SEE OLD COMPUTERS | | * SEE PEOPLE TALKING ABOUT OLD COMPUTERS | | * SEE PEOPLE SELLING OLD COMPUTERS | | * . . . AND MORE!!! | | | | | | COME JOIN THE FUN AS WE CELEBRATE THE | | COMPUTERS OF YORE ALL OVER AGAIN. | | | | | | * EVENT NEWS AND INFORMATION | | * VCF 8.0 BBS | | * EXHIBITORS WANTED! | | | | HTTP://WWW.VINTAGE.ORG/2005/MAIN/ | | | | | | __________________________________________|__ |/ \ \ | | | \__/__________________________________________/ -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

20 years, 11 months

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datasheets for 82S21 - Signetics 32x2 SRAM?

by h.otten＠chello.nl

Date: Wed, 7 Sep 2005 22:27:16 +0100 (BST) From: ard at p850ug1.demon.co.uk (Tony Duell) Subject: Re: datasheets for 82S21 - Signetics 32x2 SRAM? To: cctalk at classiccmp.org Message-ID: <m1ED7Ru-000IyXC at p850ug1> Content-Type: text/plain > > > Does anyone have a datasheet for an 82S21? I checked all the obvious > places but can't find one. > > 82S21 - Signetics 32x2 SRAM I have the datasheet, 3 pages, in the Signetics Data book. Let me know if you want a scan. Hans

20 years, 11 months

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FA vax 780 & QBUS boards available with $

by vax9000＠gmail.com

M7521 M7264 M8286 M8287 M8223 M8235 M8716 M8716 M8220B M8228 M8226 M8224 M7944 M8044 M8017 M7940 M7946 T1020 T2011 3 vaxbi ethernet cards with missing chips (probably missing 80186, and a big chip) sevaral ethernet adapters (DB15 to 8 pin socket) two long sets of ribbon cables with QBUS plugs on both ends (one is labeled 'maybe bad') condition unknown, all in anti static plastic bags contact me if interested $99.99+shipping from OHIO

20 years, 11 months

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IBM 4247 Printer & Xerox 627 MemoryWriter Available

by bill＠timeguy.com

These are both available in Lincoln, Nebraska. The IBM is a wide-carriage dot-matrix printer. The Xerox is basically just a fancy typewriter, but it looks like there's a panel on the back where you might have been able to install a computer interface; not sure. Available for pickup, or shipping if you pay for packing and shipping. Let me know within the next couple of days, or they hit the recycle bin.

20 years, 12 months

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VINTAGE COMPUTER FESTIVAL 8.0 NOV 5-6

by wayne.smith＠charter.net

> Date: Wed, 7 Sep 2005 10:10:17 -0700 (PDT) > From: Vintage Computer Festival <vcf at siconic.com> > Subject: Re: VINTAGE COMPUTER FESTIVAL 8.0 NOV 5-6 > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: <Pine.LNX.4.33.0509071005500.9451-100000 at siconic.com> > Content-Type: TEXT/PLAIN; charset=US-ASCII > > On Wed, 7 Sep 2005, Patrick Finnegan wrote: > > > On Wednesday 07 September 2005 09:18, Jules Richardson wrote: > > > Vintage Computer Festival wrote: > > > > \__/| * VINTAGE COMPUTER FESTIVAL 8.0 * | > > > > > > > > | NOVEMBER 5-6, 2005 | > > > > | COMPUTER HISTORY MUSEUM | > > > > | MOUNTAIN VIEW, CALIFORNIA | > > > > > > Hmm, how far is California from deepest Minnesota? I'll > still be in > > > the right country then at least ;-) Could well be road > trip time... > > > > Google says 2300mi from Hibbing, MN to Mountain View. > Plane tickets > > would be a 'better idea'. At 30mpg and $3/gal, that's $230 > each way > > for gas alone. > > I don't want to discourage Jules from trying, but any plane > trip out of MN is going to cost at least as much as driving > (jet fuel prices are going through the roof). The trade-off > is (if by plane) you get there faster or, (if by car) you get > to see a lot of America. > > I wish the airline industry in the States would finally just > collapse and then rebuild itself into something more viable. > I'm trying to get a flight to Vienna and prices are all over > the place...above $2,000! Ridiculous. I had an opportunity > to get a flight for under $750 yesterday and got distratcted. > When I came back to do it again today it's now under $800 > but with a 14 hour stopover in Madrid. It would be fine if > it was during the day but it would be at night, I'd have to > get a hotel, the Euro kills the dollar (Hans, I am drinking > heartily from the Euro mug), and I just don't have time (as > much as I'd love to walk around Madrid for the 8 hours or so > I would be afforded after sleep). > > Sorry for the rant. > > -- > > Sellam Ismail Vintage > Computer Festival According to Expedia, Minneapolis to SF is $255 round trip (leaving on 11/4 returning on 11/6) and Minneapolis to SJ is $332. Second tier airlines (then again, these days what's the difference), but pretty cheap considering the payoff once you get to VCF. Of course you have to drive from Hibbing (childhood home of Bob [Zimmerman] Dylan, by the way) to the big city first, which is a bit of a trek, but there's always Camp Snoopy at Mall of America to even further justify the trip.

20 years, 12 months

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translucent skins (prototypes) for SGI Indigo 2 on ebay

by chrism3667＠yahoo.com

item #5238755361. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

20 years, 12 months

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Adaptec 1460C cable?

by ethan.dicks＠gmail.com

Since I want to hook up to a 9-track tape drive, I would consider this request on-topic... I have this old Adaptec SlimSCSI 1460C PCMCIA card. I have no cable. I've seen two styles of card and cable - this one seems to be a tongue-and-groove, not single-row-of-pins. If I'm counting correctly, it looks like 26 pins (13 on each side of the plastic divider). Long ago, I found the other style of connector on a SCSI cable for $5 at Dayton. I'd be happy to find one of these for twice that. ;-) Anyone have a dead PCMCIA SCSI card, or a mystery SCSI cable in a bin that they've always wondered what it went to? Thanks, -ethan

20 years, 12 months

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Mac/Apples available in Rockville, MD. Cheap, going to the trash!

by tosteve＠yahoo.com

>From comp.sys.apple2 Washington Apple Pi (http://www.wap.org) in Rockville, MD is one of the oldest Apple user groups in the US and will be downsizing their storage area over the course of the next 10 days. That means we will have to either find new homes for dozens of macintosh and Apple computers, parts and accessories (printers, hard drives, etc.) or send them to the local recycling center. Please let me know if you would like additional information and I'll put you in touch with the people triaging the computer area. The stuff has to move and will be gone by September 15. Regards, - Mike __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

20 years, 12 months

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SGI Hardware Developer Handbook, Release 2.0 available...

by lbickley＠bickleywest.com

For the second time in years, I've obtained a copy of the SGI Hardware Developers Handbook, Release 2.0 (05/97). This book covers all SGI products from the earliest Personal Iris through the Origin 2000/Onyx2. It details Chassis; Interfaces (serial, keyboard, mouse, parallel, disk drive, monitors, memory, graphics, video, audio, CPU, Bus, backplanes, network connectors, I/O Panel Plates, Drive Sleds); "hinv" output descriptions (complete); Software & Hardware tools, etc. This book was created for SGI hardware designers - but is a terrific source of information for all SGI buffs and collectors. The copy I picked up years ago is worn from a great deal of use!!! The copy I just obtained is brand new - with no markings or scratches other than one very minor nick on the bottom of the front cover. Before I put it on "ePay", I decided to offer it to this list first via the Vintage Computer Marketplace: http://www.vintagecomputermarketplace.com/bid.cfm?ad=2009 I normally would not post my own auction item on this list - but this is one of those great finds that one seldom gets an opportunity to pick up... Cheers, Lyle -- Lyle Bickley Bickley Consulting West Inc. Mountain View, CA http://bickleywest.com "Black holes are where God is dividing by zero"

20 years, 12 months

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DEC Computer Lab

by wacarder＠earthlink.net

Does anyone have the manual or workbook for a DEC Computer Lab, which is a classroom logic trainer that was made by DEC back in the late 1960s? I recently acquired two of these interesting little pieces of computing history, along with the patch cords. I'd like to have the manual so I can learn more about it. Thanks, Ashley

20 years, 12 months

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Homebrew Circuit Boards: Methods? Supplies?

by marvin＠rain.org

> From: Jeff Walther > In fact, I have not been able to find precoated board (photoresist > coated) in the .050" thickness. So I will either need to use a > liquid photoresist or try a toner transfer system. Personally, I would avoid liquid photoresist and use dry film in its place. You could contact Fred at Far Circuits (http://www.farcircuits.net/) as he will supply boards precoated with dry film photoresist. URL for supplies is http://www.farcircuits.net/supplies.htm. According to the site, he will supply 0.047 material laminated with Dupont PM115 photo resist film.

20 years, 12 months

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Freeiah Amiga games

by leeedavison＠yahoo.co.uk

Big box, 11" x 13" x 24", full of original boxed Amiga games. Worms, Lemmings, Adams Family and many more. Collect or postage from Midlands, UK. Lee. . ___________________________________________________________ How much free photo storage do you get? Store your holiday snaps for FREE with Yahoo! Photos http://uk.photos.yahoo.com

20 years, 12 months

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Freeish Floppy drive

by leeedavison＠yahoo.co.uk

Digital FR-PCP8E-AA external floppy for P7X notebook. Condition unknown, untested. Postage or collect from Midlands UK. Lee. . ___________________________________________________________ Yahoo! Messenger - NEW crystal clear PC to PC calling worldwide with voicemail http://uk.messenger.yahoo.com

20 years, 12 months

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Homebrew Circuit Boards: Methods? Supplies?

by trag＠io.com

I imagine this topic has come up before, so my apologies in advance. Do folks have a recommendation for suppliers of circuit board making materials, or a good source of such information? I've found a number of web sites and read them. The difficulty is in knowing which place has better/cheaper/easier supplies than other places--knowledge which generally comes with experience. And several of my other questions are the kinds that generally aren't answered on websites but that one learns from experience. One complication is that I want to make a few different designs which need to be on .050" thick board. Standard board these days is .062", which rules out the affordable proto-type services that I have used in the past. In fact, I have not been able to find precoated board (photoresist coated) in the .050" thickness. So I will either need to use a liquid photoresist or try a toner transfer system. That raises other questions. Are the Toner Transfer Systems reliable (doesn't leave broken/smeared traces)? What resolution (line and spacing thickness) can one generally get with them? The TTS would be simpler. I wouldn't need liquid PR, developer and stripper, plus a UV source. If the TTS is not servicable, then I'll try the liquid photoresist. Would it be better to simply spray on, or should I try to rig a spinner? Do the developer and/or stripper usually turn out to be some commonly (cheaply) available chemical? I would prefer to avoid paying $6+ for a small bottle if I can avoid it. Thank you for any info or pointers to info. Jeff Walther

20 years, 12 months

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Available: PDP11 system + disks, crt's, la120's, etc.

by jwest＠classiccmp.org

An unknown PDP-11 system is available in Canada, PQ, Montreal. The description I received was: ------ I have a PDP11 system to sell with 3 unit of disk RL02 + a dozen of disks.of 10 megs. and 2 or 3 VT-100 terminals, plus 2 printers LA120 --------- My impression was it won't be free, but possibly reasonable. I suspect people would be more interested in the software on the disks than anything else. I contacted the person back and they said it was either an 11/23 or 11/44, they weren't sure. I'll take a couple days of responses (off-list), then pick one at random and pass the deal on. Jay

20 years, 12 months

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64 pin SIMM (Mac IIFX) Specs?

by trag＠io.com

>Date: Mon, 5 Sep 2005 21:11:02 +0100 (BST) >From: ard at p850ug1.demon.co.uk (Tony Duell) >> >Date: Sat, 3 Sep 2005 00:17:50 +0100 (BST) >> >From: ard at p850ug1.demon.co.uk (Tony Duell) >> >> >Most, if not all, of the single-bit-wide DRAM chips (4164, 41256, etc) >> >had separate DIN and DOUT pins. >> What is the point in using them separately? Was it for the case >> where the destination of a read is different from the source of a >> write? >YEs, that was the idea. It's no use if you want to link the data pins to >a bidirectional bus. >I suspect the _real_ reason for it was that there was a spare pin on the >package and it didn't ever make life more difficult to have separate DIN >and DOUT pins (oyu could just strap them together externally if you >wanted a bidirectional data pin). I'll be getting a IIfx on Thursday and I can confirm (I hope) that the DIN and DOUT are common on the mother board at that time. Your advice has given me hope that this is much more doable than I feared. If they're tied, then I should be able to build a 16MB SIMM using two 16M X 4 chips. My concern was that the X4 chips do not have separate DIN and DOUT and I wasn't certain if the IIfx actually needed the separation. I think I have some 16M X 1 chips which would work in either case, but my supply of 16M X 1 chips is much smaller. If the DIN and DOUT are common on the MB, and I use 16M X 4 chips, I assume that I should either use the DIN pin or the DOUT pin on the SIMM but not both? Using both could result in different length datapaths which remerge, possibly causing interference from slightly out of phase signals. The difference in length probably wouldn't affect the timing much, but still... It would still be handy if someone has a mechanical drawing of the 64 pin SIMMs. I can derive it from a physical example, but I'm less likely to get the actual center measurement and tolerances correct that way. Hmmm. I'll check around and see if any of the socket manufacturers are still selling a 64 pin SIMM socket. If so, I should be able to derive the SIMM dimensions from the socket datasheet. Jeff Walther

20 years, 12 months

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OT: 6.8Ghz Quantum-Optical Notebook

by SUPRDAVE＠aol.com

>>In a message dated 9/7/2005 12:44:40 PM Eastern Standard Time, >>RMeenaks at OLF.COM writes: >>Don't know if this is a hoax, but they reportedly produced the 1st 6.8GHz >>Quatum-Optical Notebook running Windows XP: >>http://atomchip.com/_wsn/page4.html It's a bullshit hoax.

20 years, 12 months

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OT: 6.8Ghz Quantum-Optical Notebook

by RMeenaks＠OLF.COM

Don't know if this is a hoax, but they reportedly produced the 1st 6.8GHz Quatum-Optical Notebook running Windows XP: http://atomchip.com/_wsn/page4.html Ram

20 years, 12 months

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Interdata Computer boards ?

by aek＠bitsavers.org

perhaps they were made by Interdata. - you are correct, sir! I'm guessing it's a model 8/16 board set 35-446 on CPU HI should be something to go by in the Interdata print sets.

20 years, 12 months

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HP 21xx update

by Tim＠Rikers.org

So, I'm mostly recovered from the move to UT and I've gotten back to working on the HPs I acquired. http://rikers.org/gallery/hardware I've fixed the visible issues with the HP-2116A and powered it up slowly with a variac with a minium of cards installed. Fans spin up ok, I get a couple of the power circuits live, but fuse F8 blows and the rest of the power circuits do no come up. No lights on the front panel etc. I'm reading through the HP-2116B vol2 manual on bitsavers (Thanx Al!): http://bitsavers.org/pdf/hp/2116/02116-9153_2116B_Vol2_Oct70.pdf But there are some differences in the power supply between the 2116A and 2116B. I don't have an A1 card for example, and the core memory is completely different. I'm kinda beating my head against the wall on this one. Still hoping Bob or someone else will dig up a Volume 2 manual for the 2116A sometime soon. =/ In the mean time, I've repaired and powered up the HP-2108A system. Things seem to checkout ok. Now anyone want to suggest a light chaser program to key in for kicks? I don't have any manuals specific to the HP-2108A here, but I suppose I should try some of the memory diagnostics routines from the 2100 or 2116 to check things out. The basics seem to work. I can store/recall values from registers and memory. I've not tried all memory locations or anything yet. I'm hanging out on #classicmp on irc.freenode.net as usual. I was hoping Jay would be around sometime or others that might suggest what to do next. ;-) My paper tape reader seems to spin up ok now, but I've not tried to talk to it in software yet. Also I don't have real tape images for things like the basic1 environment: http://oscar.taurus.com/~jeff/2100/hpbasic/basic1.abs I've got my hacked simh that has ANSI text register displays to test out routines on. That's been very useful. ;-) Any suggestions on getting pc based paper tape images over to real HP hardware? I do have a paper tape punch, but no docs on it. Also I don't currently have any blank media. Thanx! -- Tim Riker - http://Rikers.org/ - TimR at Debian.org Embedded Linux Technologist - http://eLinux.org/ BZFlag maintainer - http://BZFlag.org/ - for fun!

20 years, 12 months

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HP Viper and Hyper Viper webpage?

by rigdonj＠cfl.rr.com

Does anyone know what happened to the Viper and HyperViper webpage that used to be on HP's website? I can't find it. If it's down does anyone have a copy of it? I'm trying to help some guy out with the cards and he knows nothing about them so that page would help give him some background on the cards. Joe

20 years, 12 months

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S/36

by ceby2＠csc.com

Scott -- Normally I jump on anything S/36 on the list, but life's kept me busy enough to distract me. I collect S/36 equipment, and I have most of the manuals, some of them scanned. Consider me a resource. A couple of answers to your questions: Q: Is this like the AS/400, where if it doesn't come with an OS and firmware disk it's toast? A: No, thankfully. So long as you get the media, you're alright. There's even a way to hack around security if it's absolutely necessary. Q: What sort of drives does it take? A: As far as I know (and I haven't really explored the topic) it takes model specific drives. The file system seems proprietary to the hardware. Sellam may know different. I defer to the great one on this. Q: Is it 220v only? A: That depends on the country of origin and the model. There were four main series: 5360 - 220v only as it was a datacenter class system, 5362 - this was the deskside type with a country default power requirement 220v/110v, 5363 - another deskside but later and switchable if memory serves, and the 5364 - this one may also have been switchable, it's a desktop unit... mine's in storage or I'd check for you. Q: Any other weirdness? A: Gee... um where to begin. The system's totally unlike VMS/Unix/PDP OSs. I suppose the weirdness depends on your perspective. The basis of comparison is the AS400 since that's what superceded it. AS400 added a relational database system and more systems' management. But the underlying operating systems are rather similar. On the other hand, the hardware's totally different. S/36 (and this is distinct from AS/36) is a 16bit operating system with dual CPUs, one dedicated IO/Memory management. It's a flat address space. The system was targeted as a total office solution, and indeed it offered a very modern set of capabilities. The original strategy of office networking was based on PCs talking to a S/36. Files could be shared, there was e-mail, word processing, and a database/development analogous of non-relational MS-Access. You could pretty rapidly create tables and then build forms around them. It had it's own development language RPG, which was analagous to a VBA as it was really built to further enable the database application development. It originated as a reporting language on earlier IBM systems. Other languages were supported, Basic and Cobol come to mind. Sorry, no C. The whole thing's rather interesting when you're used to the file system based world and open systems. IMHOP its well worth playing around with if you have the wherewithal to do so. If you're into hacking it may be disappointing as it's a very closed and proprietary solution base. But if you get off on clever technology design, the rapid deploy piece of office automation is fascinating, and it does have a number of mainframe centric networking solutions available to it in addition to the twinax native to this range. Regards Colin Eby

20 years, 12 months

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Interdata Computer boards ?

by rigdonj＠cfl.rr.com

I found this stuff in a pile of scrap boards last week. <http://www.classiccmp.org/hp/Interdata/> I'm not sure who made them since I can't find a manufacturer's name on them but a number of the boards have a tag on them that says "Passed Interdata Processor Test" so perhaps they were made by Interdata. Does anyone know anything about Interdata or know who made these? The names on the files are the name that's etched into the boards and I'm sure that they're some kind of computer boards. The dates on the ICs range from 1973 to early 1976. Joe

20 years, 12 months

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VMS Question...

by ajp166＠bellatlantic.net

> >Subject: Re: VMS Question... > From: Sridhar Ayengar <ploopster at gmail.com> > Date: Tue, 06 Sep 2005 21:55:30 -0400 > To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> > >The 4000/60 and 4000/90 are similar in size to the 3100. The 4000/vlc >is *much* smaller. If I'm not quite mistaken, there was once a design >for a VAX laptop using a 4000/vlc motherboard. If you really want to >know what chassis it's in, I can dig out the info. > >Peace... Sridhar If you can point me to a picture of the 4000vlc that would do. Most of the 3100 boards are fairly small but by time you add the 3.5" scsi disks and power supply it grows but the box is still 40% air. Allison

20 years, 12 months

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VMS Question...

by ajp166＠bellatlantic.net

> >Subject: Re: VMS Question... > From: Sridhar Ayengar <ploopster at gmail.com> > Date: Tue, 06 Sep 2005 21:23:36 -0400 > To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> > >Scott Stevens wrote: > >>>You don't need a monitor, keyboard or mouse. It's quite possible to >>>run one with a serial console, so if you have any machine with a >>>serial port, a terminal emulator program and a null-modem cable, >>>you're in business. >> >> Get a MicroVAX 3100 like the one I have. Small footprint, and it's >> IMPOSSIBLE to connect a monitor and keyboard to it, because it has no >> frame buffer. > >Except it's a whole lot bigger than a 4000/vlc. > >Peace... Sridhar I thought the 4000 as also BA42 (18Wx16Dx4H) like most of the 3100s (save for M20E). I consider the BA42 box easily hid. Allison

20 years, 12 months

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VMS Question...

by RMeenaks＠OLF.COM

Hi, This is my first venture (or an attempt to venture) into the world of VMS. I have a couple of questions: 1) Is there an emulator, etc to run OpenVMS on and where can I get it as well as OpenVMS? 2) Does OpenVMS support the notion of shared libraries (DLL to you windoze users)... I want to re-port an old application, but want to use OpenVMS instead. I don't have a machine that is capable of running VMS (nor do I have the space for one), so an emulator will suffice.... Thanks, Ram

20 years, 12 months

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11/40, 11/45 INSTRUCTION EXERCISER listing

by chd_1＠nktelco.net

I have been trying to run diagnostic tapes on my PDP-11/40. It seems that I am missing the documentation for many of the CPU diagnostics. Does anyone have a listing for the 11/40 instruction exerciser? My paper tape is MAINDEC-11-DCQKC-A-PB. I load the tape and start it at 200 and it runs for a while and then begins printing out: PASS #0000 PC=015354 PSW=000000 PASS #0000 PC=015356 PSW=000000 PASS #0000 PC=015360 PSW=000000 PASS #0000 PC=015352 PSW=000001 PASS #0000 PC=015354 PSW=000001 PASS #0000 PC=015356 PSW=000001 PASS #0000 PC=015360 PSW=000001 PASS #0000 PC=015352 PSW=000001 ... This seems to run indefinitely. I have tried several different switch setting as described in the PDP-11 Diagnostic Handbook recently online at bitsavers, but it always ended up with this result. Anyone have information on this diagnostic? -chuck

20 years, 12 months

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Flight Electronics 68K SBC on Ebay

by RMeenaks＠OLF.COM

They used to make a lot of educational kits including transputer boards: http://cgi.ebay.com/FLIGHT-68000-SINGLE-BOARD-COMPUTER-Motorola-68000_W0QQit emZ5238956380QQcategoryZ4193QQrdZ1QQcmdZViewItem Cheers, Ram

20 years, 12 months

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VMS Question...

by RMeenaks＠OLF.COM

In the coming days, I am planning on selling two brand-new CSA TEK Boards (master and slave) on ebay. These are 2 of the 3 remaining TEK boards I have. I am planning on keeping one for myself. This will include the extremely RARE 2 Mbyte daughterboards (2 of them!) and two packs of the expansion chips (for the serial/parallel programming) and one unopened box of TEK software (occam, logical systems c, etc). Unfortunately, I only have one set of the documentation, but most of it is now online (except for the Compiler writer's guide, CSA User Guide, and the Occam workbook). And Roger, I really cant take on another box, regardless of how decked out it is. Wife is too angry with the stuff I already have. Plus, I only need something to compile on as I have no QBUS boards, etc. This is similar to me running MacOS (on Basilisk/PearPC).... Cheers, Ram > Ram, if you're looking for some room for a VMS box, I'd > *gladly* trade you > my totally decked out VaxStation 3100 for one of your > transputers... ;^> >

20 years, 12 months

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VMS Question...

by RMeenaks＠OLF.COM

Charon-VAX offers a freeware version now for OpenVMS users as well as Fedora Linux users. But, I am going to use SIMH. I'll just get a version of OpenVMS for hobby usage. The problem I have is more so with my wife than really space. I already have a lot of stuff in my house and adding yet another system will just make matters worse. The emulation route is more suited for me. > You can also INSTALL them which makes them memory resident and multi-user so every app > that needs access to them gets the memory copy rather than having to drag its own copy off disk every time. This sounds more like what I want to do. I am in the process of re-writing the iserver transputer host communication application to be a bit more open. Currently, all the drivers are linked into the application which makes adding new driver support a pain. I want to dynamically load the library >from the application itself. For example, the configuration file would be like this: |c0t5l0|T|localhost|/dev/c0t5l0|transputer.so|||| So, when the application configures itself for c0t510, it will dynamically load the file transputer.so and use the device /dev/c0t510 as its resource (this is NOT a real example). Is this possible? The library will have the standard INMOS communication API present (OpenLink, CloseLink, etc) Thanks, Ram

20 years, 12 months

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HP82915 Modem

by ard＠p850ug1.demon.co.uk

I recently won an HP82915 Modem on E-bay (my first, and so far, only purchase there). I was suprised to get it for the opening bid, I though I'd have at least one other HP collector to contend with. It is, you see, the internal modem for the HP Integral. Anyway, it's a single PCB that fits into one of the Integral's expansion slots. Cotnains about 20 ICs, most of which I recognise. One odd thing is that the serial chip used is an 8250, a somewhat odd choice for a 68000-based machine. Does anyone here know anything about using it? The Integral manuals I have mention it exists, say it installs like any other board, and that you need a normal 'modular phone cable' to link it to the phone line. Nothing I'd not worked out by myself. Incidentally, I have no intention of linking it to a public phone line, I just want to connect it to another modem. I suspect it'll work withont any DC voltage on the line, if not, that's easy to fix. Did anyone, though, have a cheap/homebrew device to link 2 modems back-to-back, doing things properly with dial and ring tones, etc? -tony

20 years, 12 months

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VMS Question...

by RMeenaks＠OLF.COM

> Why don't you get a VAXstation 4000/vlc? It's one of the tiniest > pizza-box cases I've ever seen. Significantly smaller than something > like a Sun 3/60. New Machine = Angry Wife = No Space :-) Ram

20 years, 12 months

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VMS Question...

by RMeenaks＠OLF.COM

Thanks for the responses. I am rewriting some applications to utilize shared libraries, etc instead of it being statically linked. Makes things a lot easier for managing user-supplied code. I will look into getting SIMH... Cheers, Ram > -----Original Message----- > From: Paul Koning [mailto:pkoning at equallogic.com] > Sent: Tuesday, September 06, 2005 1:54 PM > To: cctalk at classiccmp.org > Subject: Re: VMS Question... > > > >>>>> "Ram" == Ram Meenakshisundaram <RMeenaks at olf.com> writes: > > Ram> Hi, This is my first venture (or an attempt to venture) > into the Ram> world of VMS. I have a couple of questions: > > Ram> 1) Is there an emulator, etc to run OpenVMS on and > where can I Ram> get it as well as OpenVMS? > > SIMH. > > Ram> 2) Does OpenVMS support the notion of shared libraries > (DLL to Ram> you windoze users)... > > Yes, from day 1. > > paul >

20 years, 12 months

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Nashville Rescue - revisited

by lbickley＠bickleywest.com

Several people responded to my original "rescue" notice, but folks seem to want boards, etc. as opposed to system units. I'm bringing it up again - as I was just notified that the space where the equipment is located is now under a new lease contract, and the DEC gear must be "disposed of" as soon as possible, or it will be scrapped. This is totally "free" gear - local pickup O.K., or get it for the price of shipping... History: >From a historical perspective, this equipment is interesting - I was used to develop TSX-plus!!! The "11/73" is an "11/03" that was upgraded to an "11/23", to an "11/23+" and finally to an "11/73". The original $28K system was provided by DEC free of charge to TSX for software development... Here's the equipment list: 1 PDP11/73 processor - 1 MB memory (maybe more) 2 RL01 drives (one may not be functional) 1 RL02 drive 1 Fujitsu Winchester drive (probably around 75 MB) 2 RX02 drives 1 dual RX50 drive 1 TK50 tape unit I believe all the cabinets are original DEC. The main cabinet is a "DEC DataSystem" rack about 5.5' tall. The RL02 and the Winchester are housed in a DEC cabinet about 3 to 4 ft tall. Finally there is the "desk" which holds the floppies. PICTURES: Pictures of the what's available can be found via anonymous ftp at "bickleywest.com" in the directory "nashville". Cheers, Lyle -- Lyle Bickley Bickley Consulting West Inc. Mountain View, CA http://bickleywest.com "Black holes are where God is dividing by zero"

20 years, 12 months

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Large lot of stuff FS in Vermont

by richard.beaudry＠gmail.com

Hello all, - Found on comp.os.cpm... - I am *NOT* the seller, his information is at the bottom of this message .... I *cannot* take the whole lot, nor can I hold it (or parts of it) for others. I would be interested, however, in being part of a team to transport it someplace ... Rich B. > Hi; > > I have a huge collection of vintage equipment I want to sell. There is a > collection of several years here. Make a reasonable offer, you pick up. It > is just too much for me to deal with any more and I want a serious vintage > collector take it and use it.I cannot sell and ship selectively. And there > is just WAY too much to ship anyway.I need to sell it as ONE lot. Here is a > small sketch of what I have. Because of the range of stuff, I apologize > ahead for cross posting. > > Commodore...(2) c64,(1) C64C (2)c128,(2) vic20,(3) plus 4, and (1)c16 > computers. (4) 1541 and(2) 1571 disk drives, cables etc. 1 c2N Datasette, 2 > commodore Monitors, one working one in need of repair. There are diskettes, > miscellaneous manuals.A number of Texas instruments 994a units (both Beige > and Silver and Black) and accessories, including THE expansion box.A lot of > program cartridges,disks, a tape drve unit, etc. > > Also multiple Tandy 1000 type units,A Tandy 2000, A PC Junior and monitor > and accessories, Multiple Apple 2e, 2e+ and a number of early Macs including > 2gs. A couple of Apple 2c units and the matching monitors.A couple of Lazer > 128s, A couple of early Atari and coleco game systems and cartridges. An > Atari 520ST with monitor,A complete coleco Adam and some spare parts. 2 > Kaypros, an Osborne 1, A number of Various Zenith products including a > couple of Z100s, EZ PCs and early portables. A Panasonic Partner.There is > also a Digital Rainbow 100. There are a bunch of early notebook machines > here too from various manufacturers. > > Also a number of early desktop systems, IBM PC 5150s, IBM ATs, Various other > Early IBM machines, Zeniths, Compaqs, some portables, and other numerous > desktops with names such as Sanyo, Hundai, Wang, -- clear up through 286s > 386s 486s and early pentiums and AMD products. > > Also totes full of cards, drives, cables, parts etc. There are not monitors > for each individual system, but there is a at least one monitor that will > work with each. Some of the 8 bits use a TV and there is a TV switch unit or > two here also. Ive got a few printers, enough to match and couple with most > systems. > There is also a LOT of software,disks,books,manuals, etc.You'll need to > bring cartons :-) > > So, in short a bunch of equipment from the early 80s up through. 8 bit and > up. > > Fully 99% of the equipment is operational. All has been stored here, dry and > protected,where I live. Everything is as is, please. MAKE ME AN OFFER. > > Please email so we can make arrangements. You pick up, and I won't take > personal checks, please. I live in the central Vermont area. > > email at: onthfly1 at hotmail.com

20 years, 12 months

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S/360 channel

by brian＠quarterbyte.com

> ... would it be near to 'plug-and-go' for his > 3803-controller/3420-drives combination, or would their be a lot > of 3803-specific software-driver development on the modern-host > side (and requiring the acquisition of 100 lbs. of 3803 manuals) ? Pretty much plug and go. It's very much like a SCSI interface. Each device has a set of commands documented in its Functional Characteristics manual: read, write, get status, etc. You'd find this in the device's documentation (e.g. 3420) rather than the controller's (3803). The commands do follow a common pattern although there are some variations between devices. The Bus and Tag protocol communicates these commands from the channel (the interface in the CPU) to the device controller, and returns the results. There are several different transfer modes (byte at a time, burst, etc), different ways that the device can signal the CPU for attention, and various ways that either the channel, the controller or the device can say "hang on, I can't do that right now," so it's fairly complex. The logic frames for a typical channel interface built with 1960s vintage SLT are about the same size as the IBM 1130's CPU, for example. I suspect that data buffers (RAM) are a significant part of that. But from the programmer's standpoint, it's very simple. An IO command points to a "channel program" which is usually just a device command word and a data transfer address. The channel takes it from there, and an interrupt is issued when the operation is complete (usually). Channel to controller cabling is standardized, two thick cables. Controller to device cabling is device specific. Some devices have an integral controller. brian =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- _| _| _| Brian Knittel _| _| _| Quarterbyte Systems, Inc. _| _| _| Tel: 1-510-559-7930 _| _| _| Fax: 1-510-525-6889 _| _| _| Email: brian at quarterbyte.com _| _| _| http://www.quarterbyte.com

20 years, 12 months

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Strange Things was Re: HP82915 Modem

by rigdonj＠cfl.rr.com

At 10:18 PM 9/5/05 +0100, Tony wrote: >I recently won an HP82915 Modem on E-bay (my first, and so far, only >purchase there). <snip> I went and did some checking on E-bay after reading Tony's message and I found this: " DATA I/O 201EPROM PROGRAMMER WITH HP 82939A OPT .001" It's a DATA IO EPROM programmer with an attached HP-85 RS-232 interface! It's ended already and there were no bids. Joe <http://cgi.ebay.com/DATA-I-O-201EPROM-PROGRAMMER-WITH-HP-82939A-OPT-001_W0Q QitemZ7540654128QQcategoryZ1504QQssPageNameZWDVWQQrdZ1QQcmdZViewItem>

20 years, 12 months

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Fragile book scanner [was Re: DEC Computer Lab]

by swtpc6800＠comcast.net

I just found this scanner online, I have no experience with it. It does look good and cost about $250. The high-end machines cost $1000s. "Whereas professional book scanners are targeted mainly for large libraries, archive museums, and corporations with big budgets, OpticBook 3600 is an affordable solution for all libraries, copy rooms, students, teachers, universities, SOHO, law offices, publicists, and work groups." http://www.plustek.com/products/book.htm Michael Holley

20 years, 12 months

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