June 2016 - test-drb@ccmp.vtda.org

by jnc＠mercury.lcs.mit.edu

> From: Mattis Lind > Thanks Noel for sorting this out. Eh, de nada. But thank you. >> I wonder if the ucode in the two versions is identical? The uROM chip >> numbers should give it, (if they are the same on both versions, albeit >> in different locations on the board), but I have yet to check. Does >> anyone happen to know? OK, so the situation here is pretty complicated. To start with / make things worse, that CPU uses lots of PROMs. Lots and lots and lots and lots of PROMs. For the data paths board (M7260), both major versions appear to contain the same PROMs (going by the DEC part numbers), but the chip location (Exx) numbers are all different. For the control board (M7261), the C, E ('early' version) and F ('late' version) etch revisions each contain mostly the same PROMs, but apparently with slight differences between the sets of PROMs in each (as reflected in different DEC part numbers). For details see: http://gunkies.org/wiki/PDP-11/05#Control_PROMs to which I have just added all the gory details. As to getting the contents of all of them dumped in machine-readable form - oi vey! >> on the earlier version (prints for that version are in the GT40 prints >> online It turns out that I have hard-copy prints for the "C" etch revision of the M7261, which do not yet appear to be online; the GT40 prints have the "E" etch revision. I will scan the pages for that revision of the board, and put them up 'soon'. (I'm not doing the whole print set, it's about 1" thick, and most of them are for other things anyway, like MM11-L memory, etc.) Noel

4 years

12
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Free to a good home: Honeywell/Bull DPS-6 workstation / server (Seattle, WA)

by derschjo＠gmail.com

Hi all -- I picked this DPS-6 up over the summer and it's just taking up space (quite a bit of space) in the corner of my basement. This is a custom 16-bit, bitsliced, microcoded CPU from the early 80s with (I believe) 8mb of memory, and ethernet. It would originally have run a version of GCOS. It's about the size of a large-ish minifridge, but a bit deeper. It's also quite heavy! It's a neat machine, but it's very obscure and unfortunately incomplete (it is missing both mass storage and storage controllers). Otherwise, it is complete and in good condition (albeit a bit dirty). So you can see why you'd really want to have it in your collection . If anyone's up for a project, drop me a line. Local pick up in Seattle, WA. Thanks, Josh

5 years, 9 months

3
2
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mainframes and other stuff

by sales＠elecplus.com

Mainframes and other stuff Recycle center in NC is willing to save out "stuff" for people. No, no one can go in the back and scrounge. No, he does not want a lot of emails from people. Yes, he gets big blue and orange and beige 6 foot tall OLD mainframes in all the time. They squash them at the moment. Yes, he will package small orders, and will properly palletize larger orders. Local pick up will be available after the new year. So, if u can send me a picture with description and some part numbers, along with what you want to pay, I will consolidate things and make arrangements. Please don't ask for specific boards from DEC; they don't want to go into that much detail. QBUS will mean nothing to him. Big orange cabinet that says xxxxx is much more likely to get saved. They are moving to new warehouse 1st of the month, so all this will start happening after the 1st of the year. Cindy Croxton Electronics Plus 1613 Water Street Kerrville, TX 78028 830-792-3400 phone 830-792-3404 fax sales at elecplus.com AOL IM elcpls

6 years, 5 months

24
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Documation card readers for sale

by ball.of.john＠gmail.com

About six months ago I struck a deal with a place down in California for four Documation M1000's that I've been able to tell so far they all work but I really don't have space for more than one. I've been trying to sell them at a loss for months now over on the Vintage Computer Forums and Nekochan (if you got here you'll find pictures) but no bites. I swear there were people out there that were looking. Where did you folks go? Might anyone here be interested? I absolutely refuse to put them on the curb. -John

6 years, 7 months

9
15
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TU58 tape formatter (was Re: rebuilding DC100A cartridges?)

by shadoooo＠gmail.com

Hello. I have a VAX730 with both TU58 drives destroyed (capstan melted, need replacements). I also have a bunch of cassettes, but unfortunately all seem to have problems with the bend and/or bad spots on the tape. Possibly I would try to replace the broken bands (if I find a source) and/or replace the magnetic tape when damaged (I was thinking to try with audio cassette tape, don' t know if metal oxide high density tape could be good for it). Anybody has some information about the coercivity of original DEC TU58 tape? One problem indeed is the need of reformatting the tape, but: if I can emulate the TU58 drive using a serial, would it be possible to send raw commands to the drive using the serial and a PC? Andrea PS-If possible, some good-condition cassette would be very useful to me too. I'm located in Italy.

6 years, 8 months

14
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TI System V?

by derschjo＠gmail.com

Anyone have any idea where one might track down a copy of TI System V for the S1500 series? I've had these two TI UNIX systems for awhile now, a TI S1505 and a TI S1507 (68030 and 68040-based, respectively). They came without hard drives or OS media and so they've basically been doorstops. I asked around about OS media back when I got them (in 2013) and at the time I got no leads; I'm guessing things probably haven't changed, but I figured I'd ask again just in case... Seem like nice machines, wish I could do something with 'em... - Josh

7 years, 1 month

2
1
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Logic Analyzer software for the HP-IB/RS-232 bus pre-processor HP 10342B

by marc.verdiell＠gmail.com

This has probably been asked before, but does anyone have the software package that came with the HP-IB/RS232 HP10342 bus pre-processor for the HP1650 series Logic Analyzer (actually I have a 1670G)? It should have a config file and an inverse assembler file. I'm interested in the HP-IB files. Can't find it anywhere. - Marc

7 years, 1 month

7
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Jobs, McGowan and Olsen

by dm561＠torfree.net

An interesting 3 hours on PBS last night: - 'Steve Jobs - One Last Thing': No description necessary. - 'Long Distance Warrior': McGowan/MCI's David & Goliath battle with AT&T and disastrous merger with Worldcom. - 'Digital Man/Digital World': Ken Olsen/DEC's growth and ultimate decline. (No doubt everyone here except myself had already seen this one ;-) Interesting comparison of the different styles and personalities of three men who profoundly influenced the tech world of today and their companies. Thoroughly enjoyed it. m

7 years, 2 months

3
2
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Pine (was: Re: cctalk Digest, Vol 17, Issue 20)

by fred＠MISER.MISERNET.NET

> Date: Thu, 19 Nov 2015 21:41:53 -0500 (EST) > From: ethan at 757.org > Subject: Re: Could someone make this topic go away? > Message-ID: <Pine.LNX.4.64.1511192141030.32673 at users.757.org> > Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed > > Am I the only one left using Pine!? > > I get odd looks when I'm checking email from my cell phone. No you are not. I use (al)pine on my OpenVMS system here as well as my main Linux host. I have mail going back to 2004 here and since 1996 at another public access Unix host I use. It's great when I'm out of town and can ssh in from my phone and check the mail. :) Pine does most everything I need without having to worry about malware, phishing, etc ... the beauty of text. Fred

7 years, 8 months

14
17
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HP 9000/382 Questions

by pete＠petelancashire.com

Hello from a newbie to the list I've just acquired 2 HP 382's with expanders. Have not had the time to look inside them yet. End goal is to set one up as an instrument controller i.e. using the built in GPIB and potentially a 2nd GPIB card. One thing I do not have is a display, keyboard and mouse. A few question Is there a PS/2 or USB (yea long shot) adapter for the HPIL interface ? Does someone have a keyboard/mouse they a not beholding to, or know where there maybe one ? Once I get the opened up and take an inventory, anything I should look out for be trying to power one of them up ? Can one boot to a terminal on the RS-232 port. Until I find a kbd/mouse ? What would be optimum version of HP-UX to run on them ? -pete

8 years, 4 months

7
17
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Wanted: AT&T 3B2 systems & software

by lists＠loomcom.com

(n.b.: Sorry for the "wanted" spam from me. I think this is the last one for a while!) I have access to a friend's AT&T 3B2 Model 400 for exploratory and reverse-engineering work, but I would really like to get a system of my own. To that end, if you have an AT&T 3B2 you'd like to part with, please drop me a line. Happy to pay fair market prices, or consider some trades if you prefer that (I have a lot of DEC Qbus stuff) I'm also still looking for more documentation. I especially wish I had schematics, and any docs related to writing drivers. Anything that would be useful in documenting the 3B2 internals would be lovely. Thanks! -Seth

8 years, 5 months

3
3
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Does anyone have docs for a Ventel brand MD212-plus modem?

by ethan.dicks＠gmail.com

Hi, All, A friend of mine just returned a modem he got from me decades ago, a Ventel MD212-plus. It's an early-1980s non-AT-command-set autodialling modem. The settings are adjusted via a pair of 10-pin DIP switches accessible from the back. I've checked the web and bitsavers. So far, all I've found is some old Usenet articles and a couple of pictures, but no manual or jumper guide. One "feature" is that it lacks a modular jack to plug into the phone system. Fortunately, my friend kept the proprietary DA15 cable. I've never seen that choice of connectors on any other modem. Does anyone have any Ventel docs? Thanks, -ethan

8 years, 5 months

1
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UNIBUS/QBUS interface chips Was: Re: MEM11 update

by jnc＠mercury.lcs.mit.edu

> From: Pete Lancashire > Do you or someone have a list of all the Unibus bus chips ? I have seen the following bus interface chips used on DEC UNIBUS boards: Drivers: 8881 - Sprague, Signetics - Quad NAND Receivers: 380 - Signetics - Quad NOR 314 - Signetics - 7-input NOR 8815 - Signetics - 4-input NOR 8837 - National Semi - Hex receiver (aka Signetics N8T37) 8640 - National Semi - Quad NOR Transceivers: 8641 - National Semi - Quad transceiver The actal complete part number can vary depending on the manufacturer; e.g. the 8641's are usually DS8641N, from NatSemi, and the 380's are usually SP380A's or SP380N's. Where the basic number is not included (as with the 8T37 for the 8837) I have given it. The following chips have been used by DEC to interface to the QBUS, and I have seen many of the above chips (e.g. 8641's) used there too, so I think chips seen on one bus could be used on the other: Drivers: 7439 - Various - Quad NAND Transceivers: 2908 - AMD - Quad latching transceiver with tri-state output I _believe_ the following chips are also usable as UNIBUS/QBUS interface chips, but I'm not sure if I've seen one used there: Transceivers: 8836 - National Semi - Quad NOR 8838 - National Semi - Quad transceiver (aka Signetics N8T38) Quite a zoo! Noel

8 years, 7 months

7
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tumble under BSD

by aek＠bitsavers.org

Out of curiosity, has anyone ever gotten Eric Smith's tumble pdf creation program running under any version of BSD? I ran into a problem porting it to OS X, in the way it used rewind() and was wondering if anyone else ran into that on other BSDs

8 years, 8 months

29
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It's BASIC Week again!

by fozztexx＠fozztexx.com

I do a regular contest on RetroBattlestations called BASIC Week which is a sort of tribute to the days when it was common for programs to be published in books and magazines and people would type them into their computers. One of the neat things about distributing software through type-in listings is that there?s no need for working disk drives or tape drives, or to do complicated things like get a serial connection working and find a way to transfer files. If a computer has built-in BASIC just turn it on and start typing! Past programs have displayed vector graphics, silly text screen animations, and a couple of games. This time around the program is called Winchester Drive and the concept is to explore a mansion to see what you can find. I decided this time around to try out true sprites and made a version for both the Apple II and Commodore 128. I wanted to do a Commodore 64 version but couldn't find any line drawing routines written in assembly anywhere! I thought for sure in the last 33 years some book or magazine somewhere would have written a couple of simple routines to clear the graphics screen and draw some lines that you could POKE in and then call with SYS. Oh well, I will leave the C64 version to someone else. :-) The challenge is more about honor and glory and getting an excuse to show off old computers and/or skills with porting, but I do give out vinyl decals & stickers for prizes (http://imgur.com/a/iAS5T). I know that the TI-99/4A, Atari 400/800, Coleco Adam, MSX, and maybe some others also had sprites. Sprites aren?t really needed for porting to other systems, they?re just an easy way to move the player around the screen. The program could definitely be ported to systems that use simple character graphics or even plain text screens. The complete source code has been posted to github, and you can see the full rules and check out other submissions here: https://redd.it/3ko0nd -- Follow me on twitter: @FozzTexx Check out my blog: http://insentricity.com

8 years, 8 months

9
15
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Digital archiving tools

by wmaddox＠pacbell.net

Many of us maintain large collections of bits that we'd like to preserve over a long time, and distribute, replicate, and migrate via unreliable storage media and networks. As disk sizes (and archive sizes) have increased, the probability of corruption undetected or uncorrected by the mechanisms normally built into disk drives, network protocols, and filesystems has increased to a level that warrants great concern. I would be interested to know if there exists an archive format that has the following desirable properties: 1) It is well-documented, and relatively simple, to facilitate its implementation on many platforms present and future. 2) It supports some degree of incremental updating, but need not be particularly efficient about it. An explicit compaction operation is preferable to an overly complex format. It is adequate to use append-only strategies appropriate for write-once media. 3) Insertion and extraction of files, copying of the archives, and other archive-manipulation utilities support end-to-end verification that identical bits have been stably recorded to the media, bypassing or defeating platform-level or hardware-level caching mechanisms. Where this is not possible, the limits must be carefully delineated, with some basis for determining the properties of the platform and certifying reliability properties where possible. 4) The format should provide for superior error detection capability, designed to avoid common failure modes with mechanisms typically used in hardware. For example, use a document-level cryptographic checksum rather than a block-level CRC. 5) The format should include a high degree of internal redundancy and recoverability, say, along the lines of a virtual RAID-array. Just as biological organisms constantly correct DNA transcription errors, the idea is to have a format that is robust across long-term exposure to imperfect copying and transmission channels. Does anything like this exist? --Bill

8 years, 8 months

4
7
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assembler, disassembler for Intel 8089?

by spacewar＠gmail.com

Before I write my own, does anyone happen to have an assembler and/or a disassembler for the Intel 8089 I/O processor?

8 years, 8 months

8
20
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ROM dumps of Intel MDS-2 IOC

by fulivi＠tiscali.it

Hi everyone, I'm looking for the images of ROMs installed on the IOC (I/O controller) board of Intel MDS-2 development systems. In particular I'm looking for the content of the character generator ROM (A19-2708) and of firmware ROMs (A50 to A53-4x2716). So far I had no success in googling them. My goal would be to contribute a good emulation of MDS systems to MESS, especially for what regards the look of the video terminal. Well, this is the plan, when "real-life" is not inteferring too much... Thanks a lot. -- F.Ulivi

8 years, 9 months

7
11
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StorageTek 2920 9-track manual or instructions wanted

by axelsson＠acc.umu.se

Hi all, I have a Norsk Data ND110324 9-track drive which is a rebranded StorageTek 2920 with SCSI interface. So far I have only found a single manual for it, a quick guide card of 10 pages. Is there a manual out there which describes the unit a bit more in depth, like setting the SCSI address, diagnostic program codes, service, technical specifications and so on. So far I have got it to load a tape automatically and detect the recording density. Next step is to get it to talk to a linux-computer for imaging some old tapes. Thanks in advance, G?ran

8 years, 9 months

6
11
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Is there an authoritative copy of the PDP 11 Field Guide?

by trenchdweller＠att.net

blockquote, div.yahoo_quoted { margin-left: 0 !important; border-left:1px #715FFA solid !important; padding-left:1ex !important; background-color:white !important; } I've been using Megan Gentry's copy at http://world.std.com/~mbg/ but that seems to have disappeared recently.There seem to be several other copies available with different update dates. Which copy of this do other people use?Thanks,Paul

8 years, 10 months

5
5
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IBM 3511

by cctalk＠ibm51xx.net

Pictures or it didn'didn't happen ;) -Ali -------- Original message -------- From: William Donzelli <wdonzelli at gmail.com> Date: 6/9/2016 10:39 PM (GMT-05:00) To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: IBM 3511 So today I picked up something I had never seen before - an IBM 3511. This is a large tower expansion chassis for the PS/2 line. It looks very straightforward - but can any of you PS/2 fans comment on this? Was it an unsuccessful product? Low demand item? -- Will

8 years, 11 months

5
15
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HP 9845B Model 100 PSU - looking for transformer

by Martin.Hepperle＠dlr.de

Hi, I have got a 9845B which has a defective power supply unit - obviously a very common problem. After replacing the cracking epoxy capacitors I found that the mains transformer seems to have a broken input winding. Maybe someone tried to run it at 220V using the 110V input selector switch. What I am now looking for is a defective PSU with a good transformer, resp. just the transformer which may also have been used in other HP devices.. The transformer is located on the PSU mother board between the two large capacitors. It has the part number "9100-4037" and the date code "8-81" printed on it. It has two input windings and three output windings. Thus the output is a bit different (one additional winding compared to Tony Duells schematics). Maybe someone can help? Martin

8 years, 11 months

2
1
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Wanted: VT5x roll-around stand

by fritzm＠fritzm.org

I have a nice VT52, but it sits on the floor right now... I would dearly love to track down one of the old roll-around pedestals for it (as pictured here: http://cdn4.static.ovimg.com/m/04jldl). Didn't happen to see one in the warehouse by any chance, did you Todd? :-) cheers, --FritzM.

9 years

12
25
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UNIBUS M9312 ROMS

by billdegnan＠gmail.com

Posted an inventory of my M9312 ROMs http://www.vintagecomputer.net/browse_thread.cfm?id=638 b -- @ BillDeg: Web: vintagecomputer.net Twitter: @billdeg <https://twitter.com/billdeg> Youtube: @billdeg <https://www.youtube.com/user/billdeg> Unauthorized Bio <http://www.vintagecomputer.net/readme.cfm>

9 years

10
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AIX from Motorola

by plamenspam＠afterpeople.com

Hello, Anyone have Motorola based AIX installation cds at least 4.1.4r4 or newer? Regards, Plamen

9 years

2
2
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Early PDP-11/45 backplane SPC power

by fritzm＠fritzm.org

So, after finding that a DL11-E wasn't working in the backplane SPC slots (26-28) on my 11/45, I took a closer look. The problem isn't exactly what I had expected -- -15V seems to be distributed there, but +15 is not. Looking closely at the print sets, the listed configurations only mention DL11-A, the 20ma current loop model, which wouldn't require +15 to work. I wonder if some +15 distribution wires were added in an ECO, or maybe EIA console from the backplane SPC slots was never supported for these early 11/45s (mine is serial 152). There's one other oddity -- the power distribution table in EK-11045-MM-007, page 510, implies that +15 should be distributed to the SPC slots on CA1. I'm wondering if this is a typo, since I'd expect that pin to be NPG? The DL11-E looks to be expecting +15 on UA1 in any case.

9 years

2
6
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FOCAL-65 for the 6502?

by nw＠retrocomputingtasmania.com

Long ago there was a thread about FOCAL-65 for the 6502, and I asked the people involved but it seemed it never came to light. http://ana-3.lcs.mit.edu/~jnc/cctalk/2001-September/1691.html As it happens I appear to have both the user-manual and a quite thick photocopied (not great quality) listing of FOCAL-65, that I am happy to scan and upload somewhere. However, if this already exists somewhere and can point to it, I can put this scanning task aside. thanks.

9 years

3
5
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Building replacement panels for machines

by ian.finder＠gmail.com

Just wanted to drop a line here- despite a shipping misfire, Rod Smallwood's replacement 8/e panel finally arrived yesterday and they look KICK ASS! Thanks, Rod! I'd love to start building artwork for the 11/40 panel- mine looks pretty sorry at the moment. Does anyone here have scans to get started with and best practices to use? Thanks, - Ian Sent from Outlook<https://aka.ms/kr63o9> on iOS

9 years

2
1
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My Southern/Central California trip

by tosteve＠yahoo.com

Hey, I'll be driving around southern and central California in a few weeks. Will be between LA and Yosemite Park. Does anyone have a garage or other pile of computers that you want thinned-out? I can come-by and take some of it off your hands. Thanks- Steve.

9 years

1
0
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re-initialize PDP 11 BASIC?

by billdegnan＠gmail.com

I seem to remember there is an entry point that one can use to reinitialize BASIC already loaded into core memory, with the intention of re-answering the questions about MEMORY SIZE, Use SIN?, etc. Is this correct? I looked in the docs I have b ut I could not find it. If no one has this info I will have to disassemble, IN a HEX editor I see the questions are all at the end. -- Bill

9 years

3
4
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old friend is slimming down the warehouse

by connork＠connorsdomain.com

+1 You tell em Will! -Connor K On Jun 21, 2016 4:05 PM, William Donzelli <wdonzelli at gmail.com> wrote: > > > I have sent Todd his contact info. He is willing to let one person come in and take pics and post to the group. He does NOT want to move one or 2 items of the most value; he wants to move out pallets of stuff. He is not closing shop; he just wants to move out some really old equip that has been there for years. > > Be sure to tell your friend that the mainframe collectors can > certainly make cubic feet of equipment leave the warehouse quickly! > > -- > Will

9 years

26
44
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Tandy TRS0-Model 2000 Computer Monitor required

by barythrin＠gmail.com

The 2000 isn't fully compatible either i thought since its one of the few PCs using the 80186 processor. When i acquired mine (also without a monitor and i think without keyboard or software ) i sort of accepted id likely not get it running. But perhaps the ?software is out ?there and less of a concern than i thought. I didn't know it was compatible with the cm-1 but i never checked what video card mine had. Still an interesting system historically.

9 years

1
0
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Tough to Diagnose issue with PDP 11/40 CPU

by jnc＠mercury.lcs.mit.edu

> From: William Degnan > The problem was a missing KJ11 Ah. Well, if you want to add one (I assume you've just re-jumpered the machine for the moment), I do have one we can copy (for the PC etch) - I'm assuming here that originals are now unobtainium. Also, if you have the KE11-E, but not the KE11-F (the former is a prereq for the latter), and would like one, I have one I have no use for (Unix doesn't use that version of the PDP-11 floating point), and would be willing to trade it for something I do have a use for. > My error. Lesson: Always check everything. Yes, always a good rule when dealing with recovered machines. I always take them apart and go through them completely, verifying all cables, etc from the original documentation. Noel

9 years

2
1
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Tough to Diagnose issue with PDP 11/40 CPU

by jnc＠mercury.lcs.mit.edu

> From: William Degnan > The IOT step is bombing (?) and loops through the addresses: This may be a pointless question, but just to clear the ground first: the CPU is otherwise functioning reasonably well? E.g. it's not dropping the 020 bit when reading words from memory? (That would convert the '220' new PC in the vector to '200', and produce exactly the behaviour you are seeing.) If it is otherwise more or less working, so this is specific to IOT trap handling, I agree with Fritz - a KM11 would be a big help. Noel

9 years

2
1
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Tough to Diagnose issue with PDP 11/40 CPU

by billdegnan＠gmail.com

I thought I'd throw this one out to those who know more than I about the PDP 11/40 I am working with DaveR on vcfed.org/forum who asked me to run the following program as a test from the front panel: 20 - 220 ; IOT trap vector (New PC) 22 - 340 ; IOT trap vector (New PSW) 200 - 012706 ; MOV #600,SP 202 - 600 204 - 240 ; NOP 206 - 0 ; HALT 210 - 4 ; IOT 212 - 240 ; NOP 214 - 0 ; HALT 216 - 0 ; HALT 220 - 0 ; HALT 222 - 0 ; HALT START the program running from address 200. ---------------------- Problem is - The IOT step is bombing (?) and loops through the addresses: 204 206 210 200 204 206 210 200 endlessly. Anyone care to speculate which CPU card is the culprit? -- @ BillDeg: Web: vintagecomputer.net Twitter: @billdeg <https://twitter.com/billdeg> Youtube: @billdeg <https://www.youtube.com/user/billdeg> Unauthorized Bio <http://www.vintagecomputer.net/readme.cfm>

9 years

3
2
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Tough to Diagnose issue with PDP 11/40 CPU

by billdegnan＠gmail.com

On Jun 30, 2016 1:19 AM, "Fritz Mueller" <fritzm at fritzm.org> wrote: > > Hey Bill, > > Do you have a KM11 maintenance card? Guy Sotomayor here sells kits and/or assembled boards at http://www.shiresoft.com/products/km11/KM11%20Replica.html. I built one up myself based on a layout by Tom Uban at http://www.ubanproductions.com/museum.html > > The easiest way to get to the bottom of this since you have a nice, short, repro case would be to step through the microcode with a KM11 and see where it goes awry. From that point, its fairly easy to come of up a list of boards to swap and/or chips to check. > > If you want to go to the chip checking stage, you'll need some board extenders and a logic probe, they are pretty cheap. Or you can grab a surplus logic analyzer and some DIP clips off eBay if you want to get posh! > > I just went through this process with my 11/45, it was pretty educational. > > --FritzM. Fritz, It turns out that I was missing the KJ11 my cpu cards were wired to expect. On the 11/40 this module is the little M7237 card for space E of slot 3. The machine in question did not come with this card, I assumed it was not needed until I checked the cpu jumpers and discovered my error. Should have done this 1st! It was impossible to run the CQKC diagnostic for 11/40 or 11/45 - http://www.vintagecomputer.net/temp/disassembly.txt Instructions using IOT in particular. Bill Degnan twitter: billdeg vintagecomputer.net

9 years

1
0
0 0

Tandy TRS0-Model 2000 Computer Monitor required

by brendan＠mcneill.co.nz

Looking for a Tandy TRS-80 Model 2000 compute monitor. Wikipedia description here: https://en.wikipedia.org/wiki/Tandy_2000 <https://en.wikipedia.org/wiki/Tandy_2000> The monochrome is model VM-1 Monitor, the colour is CM-1 Monitor. Many thanks Brendan --------------//---------------- brendan at mcneill.co.nz +64 21 881 883

9 years

6
6
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Y Combinator is restoring one of Alan Kay's Xerox Alto machines

by curiousmarc3＠gmail.com

And here is Ken's new post in the series http://www.righto.com/2016/06/restoring-y-combinators-xerox-alto-day.html Marc > On Jun 21, 2016, at 10:59 PM, CuriousMarc <curiousmarc3 at gmail.com> wrote: > > The restoration is physically happening at my place. As noted below we have > a small and quite knowledgeable group of people contributing, including > actual hardware when we are missing a part (thanks Al !). A few of us are > chronicling this on our favorite media from our favorite angle. > I like to make short videos trying to convey the inside story of the > restoration, on my YouTube channel: > https://www.youtube.com/curiousmarc > It's interspersed with all the other restorations, but two videos so far: > https://youtu.be/YupOC_6bfMI > https://youtu.be/xPyqQXFC2yw > Ed Thelen likes to collect every bit of raw information floating around, > including some of the team emails and throw them into equally raw site, as > he does for the IBM 1401 restoration effort at CHM: > http://ed-thelen.org/RestoreAlto/index.html > Carl Claunch methodically recounts everything he does every day (and he does > a lot), so when he works on the Alto, you'll know every detail: > http://rescue1130.blogspot.com/ > Ken Shirriff makes deeply researched, superlative detailed posts on his > blog. These are reference pieces, I admire them a lot: > http://www.righto.com/2016/06/y-combinators-xerox-alto-restoring.html > And it gets discussed on the Y-combinator (the owners of the machine) and > hopefully here too. > Seeing the interest, I will make an effort to post new links when they > become available, unless of course Master Al beats me to it. > > Marc > > -----Original Message----- > From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Al Kossow > Sent: Monday, June 20, 2016 8:54 AM > To: cctalk at classiccmp.org > Subject: Re: Y Combinator is restoring one of Alan Kay's Xerox Alto machines > > http://www.righto.com/2016/06/y-combinators-xerox-alto-restoring.html > https://news.ycombinator.com/item?id=11929396 > http://ed-thelen.org/RestoreAlto/index.html > >> On 6/20/16 8:51 AM, Al Kossow wrote: >> I post just went up on Saturday. It's nice that both CHM and LCM folks >> are helping with this. >> >> >>> On 6/20/16 8:41 AM, Liam Proven wrote: >>> http://www.righto.com/2016/06/y-combinators-xerox-alto-restoring.html >>> >>> Found via: >>> >>> http://www.osnews.com/story/29261/Xerox_Alto_restoring_the_legendary_ >>> 1970s_GUI_computer >>> >>> There are 2 videos up so far, with disassemblies that may interest >>> CCmpers. >>> >>> Some people from the list are involved, including Al Kossow, but I >>> haven't seen the link posted. >>> >> >

9 years

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IBM 6360 8 inch floppy drive

by walton.david＠sky.com

Hi I collect vintage IBM laptops, have just joined the community, and wonder if anyone can help with the following: 1. Can write a Teledisk image of concurrent CP/M for Displaywriter to two 8 inch floppy disks which I can supply? 2. Can solder a cable fie me which will interface an ibm 6360 8 inch floppy to a PC. I am unable to do this myself. 3. I have an external 5.25 floppy adapter/a inside an ibm ps/2 p70 and wonder if the external 37 pin connector is pin compatible with the 37 pin connector of the ibm 6360 8 inch floppy drive? I thought about connecting two out of the 3 cables from this drive to an IBM displaywriter (supplying the correct voltages etc) and the 37 pin connector to my external 5.25 adapter/a card? Thanks for your help. David

9 years

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On Offer: MAI Basic Four Mini in Chicago

by silent700＠gmail.com

It's that time of year when a young man starts to take stock of reality (for better or for worse) and decides that his load must be lightened. This time the machine with on the block is an MAI Basic Four deskside minicomputer. I'm not sure of the exact model but it can be seen in the first three pictures in this gallery: https://picasaweb.google.com/102190732096693814506/HaulOf10315?noredirect=1 Note: nothing else in that gallery is on offer at this time - maybe later. However other random hardware may be thrown at you during the transfer. I have not powered it up. I was told it was working when taken out of service many years ago, but we all know how that goes. I have some documentation for it that I will be scanning (some of which is not already on Bitsavers) but I will send it along to whoever takes the machine afterwards. I do not have any disk or tape media for it. I'm not looking to get a lot for it - trades would be fine, preferably for something that I can lift myself, however I am also looking for a working DEC RX02 drive or a later IBM terminal controller (3174 or similar) with Ethernet that I can use to run IBM real terminals on Hercules. Preference goes to: 1) someone local who can haul it away. I am not presently equipped to deal with shipping anything this large. 2) someone will will get it sooner rather than later 3) someone who will make it sing again. If you're coming to VCFMW in September, the storage unit holding the MAI is just a few miles away from the hotel and we can do the loud-out then. If you're here sooner, even better. -j

9 years

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Mim.Update.UU.SE

by bqt＠softjar.se

Some people might have noticed that Mim.Update.UU.SE have not been reachable the last week. This is because the University have decided to put all systems behind firewalls, which hurt the Update computer club pretty bad. For people who would still like to get access to Mim, I have now setup telnet to listen to a second port in addition to port 23. Mim is now accessible by telnet on port 10023 as well, which is not blocked by an firewall. In addition, I also added ftp on port 10021 in addition to port 21, so people who would like to get to files on Mim by ftp can do so again. This also prompted me to make a couple of improvements to BQTCP/IP for RSX. The changes are that the telnet daemon can now be set to listen to an alternative port, and can also listen to several ports. I also added the capability to the ftp client to specify which port to connect to. The TCP/IP package can be found at ftp://mim.update.uu.se:10021/ However, if you have the previous version of TCP/IP for RSX, you cannot access this address, as the previous version ftp client did not accept a port argument. So it's a bit of a chicken and egg thing. But using some intermediate system, you can get the disk image to the machine, and install the new version, after which things will be possible to use more or less as before. One more thing: NEMA, my very tiny EMACS clone for RSX, have gotten a lot of work done lately, and if anyone is interested in this tool, I really recommend that you fetch the latest version. A port to VMS is also included with the files now, courtesy of Erik Olufsen. NEMA is available at ftp://nema at mim.update.uu.se:10021/ Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

9 years

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Dual Head Rainbow Video

by robert.jarratt＠ntlworld.com

Just in case anyone is interested, I have just posted a video on YouTube of my Rainbow 100+ (not the one I am selling) running in a dual head configuration. The quality of the video isn't great, but it might interest a few people. You can find it here: https://youtu.be/y4p9plwjRio Regards Rob

9 years

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DL11 configuration for pdp11gui

by jnc＠mercury.lcs.mit.edu

> From: Fritz Mueller > So far I haven't seen any place in PDP11GUI to set anything other than > port and baud rate You might have to use native OS tools to do that. On Unix, that will be 'stty'; on Windows, you'd have to use native Windows tools to do that; if you go to the Device Manager, select your serial port, and click on 'Properties', it has a tab ('Port Settings') for that (or, should I say, it used to - not sure about the most recent versions, they're making it all smart-phone like for brain-dead lusers). > From: Don North > Mostly PDP11GUI does not care, either 7b or 8b. I'm kind of surprised to hear that; I assumed that PDP11GUI can download binaries, and for that, 8-bit is kind of necessary? Side-story: when I started bringing up my -11's, the first one I did was an -11/23. So I needed a way for my Windoze box to talk to the -11's console line, for ODT. I was too lazy to figure out how to use some existing software, so I decided to write some. I wanted to be able to use it (later) to talk to one -11 from another, and I didn't know how to do complex terminal hacking under Windoze anyway, so I decided to write it under Unix. V6, to be exact (I consider all later versions to be unholy perversions - well, V7 isn't too bad, I guess), running on Ersatz11 on the Windoze box. Later, I wanted to be able to load .LDA files, which are 8-bit binary. One problem. Native Unix V6 doesn't have the ability to output 8-bit binary over a serial line (or input it, for that matter). When I first started using V6 at MIT, the DSSR people had already totally re-written the TTY driver, and added that capability, so I never ran into this problem before. Also, the native V6 stty() call isn't very flexible, and there are no spare mode bits. So they'd added a new system call, ttymod() (sort of like ioctl(), but done before it), to control all their wonderful extensions. I decided not to replicate that, but rolled my own upwardly compatible extension to stty(), which adds all that extended semantics. From there, it wasn't too much work to get sending the absolute loader down the serial line in its original binary form (which means all the old console bootstraps work, too), and using that to load .LDA files. Noel

9 years

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Some questions about the MC6839

by spc＠conman.org

(My original message to cctech has yet to appear. I thought I might try the cctalk list). While Motorola never shipped the MC6839 [1] the binary is available [2] and I've been playing around with it [3]. While it's not producing the exact same results as I get on a more modern machine, it appears to be "close enough" for me to be happy with it. But I am having one issue that I can't figure out. The documentation for the FMOV operation says: FMOV Move (or convert) arg1 -> arg2. This function is useful for changing precisions (e.g. single to double) with full exception processing for possible overflow and underflow. Okay. And to call it [4]: ------------------------------------------------------------------------------ |Function|Opcode| Register entry conditions | Stack entry conditions ------------------------------------------------------------------------------ | FMOV | $1A | U = precision parameter word| push arg | | | Y -> argument | push precision param word | | | D -> fpcb | push ptr to fpcb | | | X -> result | call FPO9 | | | | pull result ------------------------------------------------------------------------------ For moves, U contains a parameter word describing the size of the source and destination arguments. The bits are as follows, where the size is as defined in the fpcb control byte Bits 0-2 : Destination size Bits 3-7 : unused Bits 8-10 : Source size Bits 11-15: unused And the size bits are defined as: 111 = reserved 110 = reserved 101 = reserved 100 = extended - round result to double 011 = extended - round result to single 010 = extended - no forced rounding 001 = double 000 = single It appears that to convert from single to double, I would set U to $0001, but the results are *so* far out of whack it's not even funny. I've tried setting U to point to the value $0001 and that doesn't work. I've tried shifting the bits (because in the FPCB they're the upper three bits) and that doesn't work. I've tried reversing the registers and that doesn't work. Does anyone have the actual source code [4]? Or know what I might be doing wrong? -spc [1] A ROM with position independent 6809 object code that conforms (to what I can find) with IEEE 754 Draft 8. [2] Available in the file fpo9.lzh here https://ftplike.com/browser/os9archive.rtsi.com/OS9/OS9_6X09/PROG/ [3] Using a 6809 emulator library I wrote: https://github.com/spc476/mc6809 Not much documentation I'm afraid. [4] Register entry: ROM base address + $003D Stack entry: ROM base address + $003F [5] I'm lead to believe that Motorola release the code into the public domain.

9 years

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Power cable identification

by derschjo＠gmail.com

So I know for certain that this topic has come up before, but I cannot for the life of me find the thread(s) it appeared in, so I'm asking again (apologies in advance). What is the name of the rounded, 3-pin power connector often seen on early test equipment (I've seen it on older HP and Fluke stuff)? I have an S-100 chassis that inexplicably uses one, despite dating from 1982 or so. I need to track one of these cables down but I have no idea what it is exactly I'm looking for... Thanks as always, Josh

9 years

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Some questions about the MC6839

by spc＠conman.org

So Motorola apparently never produced the MC6839, a ROM containing position independent 6809 code for implementing (as far as I can see) IEEE 754 Draft 8. Motorola *did* however, release the resulting binary into (from what I understand) the Public Domain [1] but I've yet to find the actual source code, which would solve my current problem. I'm playing around with the code in an MC6809 emulator [2] and trying to use it (getting my retro-software fix in as it were). It works---not as accurate as today's stuff, but close enough and it supports single and double precision. The current issue I have is with the FMOV opcode (register entry) described as: ------------------------------------------------------------------------------ |Function|Opcode| Register entry conditions | Stack entry conditions ------------------------------------------------------------------------------ | FMOV | $1A | U = precision parameter word| push arg | | | Y -> argument | push precision param word | | | D -> fpcb | push ptr to fpcb | | | X -> result | call FPO9 | | | | pull result ------------------------------------------------------------------------------ For moves, U contains a parameter word describing the size of the source and destination arguments. The bits are as follows, where the size is as defined in the fpcb control byte Bits 0-2 : Destination size Bits 3-7 : unused Bits 8-10 : Source size Bits 11-15: unused It's not clear if U should contain the actual parameter value, or a pointer to the parameter value. It just doesn't seem to work no matter how I code it. Anyone have any clue? -spc (I'm at a loss here ... ) [1] Available in the file fpo9.lzh here https://ftplike.com/browser/os9archive.rtsi.com/OS9/OS9_6X09/PROG/ [2] I wrote one: https://github.com/spc476/mc6809 Not much documentation I'm afraid.

9 years

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PDP11GUI under Wine on Linux -- extra backslash?

by fritzm＠fritzm.org

So, I am trying to run PDP11GUI under Wine on Linux, and I am having problems loading a machine description file. It seems when PDP11GUI tries to kick off M4, it is expanding an extra backslash into the command. So you get this sort of error message (note extra backslash before m4.bat): Can't recognize 'C:\Program Files (x86)\Joerg Hoppe\PDP11GUI\\m4.bat" "C:\users\Public\Application Data\PDP11GUI\machines\pdp11.ini" "C:\users\fritzm\Temp\tmp_pdp11gui_m4_out.ini' as an internal or external command, or batch script. I've verified that I can run m4.bat sucessfully manually if I set the appropriate env vars first. But this doesn't help because it seems like PDP11GUI deletes the file and then (fails to) regenerate it on each run :-( Anybody else run in to this or have a suggestion for a workaround? thanks much! --FritzM.

9 years

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More things that we are considering offloading.

by mattislind＠gmail.com

DECprinter I, GE TermiNET30, C Itoh CIT-101e, PDP-11 manuals, PDP-8 diagnostic duplicates, TI SilentWriters etc etc. http://www.datormuseum.se/available /Mattis

9 years

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More things that we are considering offloading.

by COURYHOUSE＠aol.com

if it was close I would jump on that terminet 30! Ed# In a message dated 6/27/2016 1:38:34 P.M. US Mountain Standard Time, mattislind at gmail.com writes: 2016-06-27 21:41 GMT+02:00 Ian S. King <isking at uw.edu>: > So far away.... <sigh> (Pacific Northwest, United States) > That is right. Forgot to mention that everything is outside Str?ngn?s in Sweden. /Mattis > > On Mon, Jun 27, 2016 at 12:20 PM, Mattis Lind <mattislind at gmail.com> > wrote: > > > DECprinter I, GE TermiNET30, C Itoh CIT-101e, PDP-11 manuals, PDP-8 > > diagnostic duplicates, TI SilentWriters etc etc. > > > > http://www.datormuseum.se/available > > > > /Mattis > > > > > > -- > Ian S. King, MSIS, MSCS, Ph.D. Candidate > The Information School <http://ischool.uw.edu> > Dissertation: "Why the Conversation Mattered: Constructing a Sociotechnical > Narrative Through a Design Lens > > Archivist, Voices From the Rwanda Tribunal <http://tribunalvoices.org> > Value Sensitive Design Research Lab <http://vsdesign.org> > > University of Washington > > There is an old Vulcan saying: "Only Nixon could go to China." >

9 years

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wanted: TI Silent 700 Model 763 & 765 Maintenance Manual

by spacewar＠gmail.com

Does anyone have that? The manual for Model 743 & 745 is on Bitsavers, but I'm specifically looking for model 763 & 765.

9 years

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CiTOH terminals (was Re: old friend is slimming down the warehouse)

by ethan.dicks＠gmail.com

On Fri, Jun 24, 2016 at 11:06 PM, Pete Lancashire <pete at petelancashire.com> wrote: > Rather have a C Itoh CT-101e .. I can probably help with that. I'm in Ohio and I get out to Chicago and NJ a couple of times a year. I have a cabinet of CiTOH terminals I bought from my employer "some years ago". ;-) We used an assortment of DEC VT10x, VT220, CiTOH 101 and CiTOH 101e terminals. ISTR the CiTOHs were as much as $800 cheaper than DEC terminals at the time. They were robust and at one point, I pulled out of the manuals the magic escape sequence to "switch sessions" and use the local printer port as a second comms line (we just had to bang out a custom DB25 adapter since the entire company was standardized on Nevada Western 6p6c modular serial and we didn't have a box of the right adapters for the printer port). It was awesome having two live lines in front of our usual switchbox setup for connecting to multiple hosts. > ... knew one of the developers Neat! > F/W was done in the US I can no longer remember the key combination but the > terminal would let you know who did it That would be fun to look up. > Anyone wants to gain a cubic foot or two let me know You got it! -ethan

9 years

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pdp 11?

by jnc＠mercury.lcs.mit.edu

> From: Adrian Stoness > friend found this now opening channels to rescue it > its an 11 of some sort not sure witch one ??? Both URL's are the same picture - an envelope on the floor? Noel

9 years

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pdp 11?

by jnc＠mercury.lcs.mit.edu

> From: Adrian Stoness >> its an 11 of some sort not sure witch one Ah, OK. That's either an -11/04 or -11/34 in the top left corner, with either an RX01 or RX02 above it. (Not enought detail in the image to say.) The rest of it seems to all be some sort of custom medical or other specialized hardware. (The /04 and /34 are very similar - the only difference is which processor card(s) is/are plugged in - you can convert most -11/04's [it depends on the specific backplane in use] to -11/34's by pulling the M7263 KD11-D -11/04 processor card, and plugging in instead the M8265 & M8266 KD11-EA -11/34A processor cards, which still seem to be relatively prevalent.) Noel

9 years

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"Key" to open an HP 264X terminal

by curiousmarc3＠gmail.com

Questions for our HP specialists. I can't open the case of the HP 264x terminals I just got. I see from the manual there is a small slot on the side in which you have to insert a "key". Is the key just a small blade tool or does it have to be more special shape than that? Marc

9 years

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pdp 11?

by tdk.knight＠gmail.com

friend found this now opening channels to rescue it its an 11 of some sort not sure witch one https://scontent-iad3-1.xx.fbcdn.net/t31.0-8/13528577_10154158749830056_645… anyone know what a dliiw s/w is? https://scontent-iad3-1.xx.fbcdn.net/t31.0- 8/13528577_10154158749830056_6453066395005995961_o.jpg see if i can rescue it maybe all of it

9 years

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Quadra 660AV what's with the "PowerPC" label?

by swiftgriggs＠gmail.com

I noticed someone selling a 660AV in my area on Craigslist. I went and got it because for $50 he had a nice little Apple display with the machine that matches my Quadra 700 and an Apple Adjustable Keyboard in good condition to go with it. Turns out he gave me a whole slew of spare mice and an extra Apple Design keyboard (a good, if ugly and PeeCee lookin', spare). The 660AV was dead when I brought it home. It would bong normally but wouldn't produce any video. The RGB video connector on the monitor was smashed out of shape, too. So, I used a sheet metal tool to re-smash the connector back into the right shape, and some needle nosed pliers to straighten the pins. Then I replaced the PRAM battery on the mobo and that fixed it. I guess they don't quite last 23 years. The weird thing about this machine is that it says "PowerPC" right on the front, but it's *NOT* a PPC. It's most definitely a 25Mhz 040'. I wonder why that's there? Maybe the guy took the badge from another system, but I don't think so. This was the original owner. I also wonder why this one is called a "Quadra" when I know I used to have a 660AV that was a "Centris". Wikipedia seems to imply it was just a marketing name change only. However, the article also mentions that most of the Quadras don't have a floppy with motorized eject. Well, this one does. Perhaps it was replaced. I just wonder what's up with these little nuances. The best part of this deal is that the Apple Adjustable keyboard feels mechanical, and I've been pretty impressed with it so far (once you carefully remove the plastic wristrests). It was a bit yellowed, but a bit of retr0brite treatment restored it to bright white. It looks pretty much new, now. I gotta do the Quadra 700 and 660AV next. They aren't badly yellowed, but somewhat. Since neither is scratched up, they should restore nicely. My plan is to run A/UX on the Quadra 700 and MacOS 8.1 on the 660AV. Right now I have everything in pieces. I'm waiting on another SCSI2SD to come to be able to set them both up. Plus, I just got the one SCSI2SD and I'm in the process of benchmarking it on several different OSs. I wish the US vendor would sell the newer (v6) board, as it's supposed to support 10MB/s synchronous (if your SD card can do it, and most can these days). All they have on Ebay right now are the older 5.x based cards (which is like the one I have now). -Swift

9 years

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Pictures from the GA warehouse, take 2...

by killingsworth.todd＠gmail.com

Ok gang - here's the 100+ pics from the warehouse: https://www.flickr.com/gp/144446985 at N04/b76872 I included pics with model numbers where I could find them >From what I could see: ** NO PDP or SGI anything (not even a coffee mug) ** Commodore 64 with peripherals, pretty much new in box Sun E3000 DEC VAX and Alpha desktop boxes DEC VAXServer 3800 Three IBM mainframe peripherals of some sort IBM robotic tape archiver Terminals: DEC, IBM, Qume, AT&T, others CRT displays Printers: Okidata, etc Keyboards: lots of special IBM versions, listed below 8 pcs of the rare short Keyboard I described to you earlier. Model F Keybds: I am not sure how many model F keyboards I have, but I do have them. ~ 4 pcs of Original IBM PC and PC XT Keyboards (1981-1984) IBM 5251 Keybds: I have approx 8 pcs of 5251 Keyboards. Keyboards we have: IBM 3151 104 ~20 IBM 3161 104 ~50 IBM 3162 104 ~25 IBM 3163 104 ~25 IBM 3164 104 ~50? IBM 3178 ~100 IBM 3179 ~100 IBM 3180 122 ~150? IBM 3191 ~100? IBM 3192 122 & 104 ~100? IBM 3193 Unkown Qty yet ? IBM 3194 Unkown Qty yet ? IBM 3196 122 & 104 ~75 pcs of 104 IBM 3197 122 & 104 ~75 pcs of 104 IBM 5155 Unkown Qty yet ? IBM PC XT/AT Unkown Qty yet ? IBM 3471 122 & 104 ~75 pcs of 104 Sm qty of 122 IBM 3472 122 & 104 ~75 pcs of 104 Sm qty of 122 IBM 3476 122 & 104 ~75 pcs of 104 Sm qty of 122 IBM 3477 122 & 104 ~75 pcs of 104 Sm qty of 122 IBM 3481 122 & 104 ~75 pcs of 104 Sm qty of 122 IBM 3482 122 & 104 ~75 pcs of 104 Sm qty of 122 IBM 3483 122 & 104 ~75 pcs of 104 Sm qty of 122 IBM 3486 122 & 104 ~75 pcs of 104 Sm qty of 122 IBM 3487 122 & 104 ~75 pcs of 104 Sm qty of 122 IBM 3488 122 & 104 ~75 pcs of 104 Sm qty of 122 IBM 3489 122 & 104 ~75 pcs of 104 Sm qty of 122 Here are detailed part numbers: (we probably have other models not listed!!) 1368193 1386304 1386887 1390123 3191/3192 1390238 3191/3192 1390572 3196/3197 1390572 3196/3197 1390702 3191 1390702 3192 1390876 3196/3197 1390876 3196/3197 1391401 Clicky Vintage 1392595 1394099 1394100 3471, 3472, 3481, 3482 3483 122-Key 1394167 3476, 3477, 3486, 3487 122-Key 1394193 1394204 3472 104-Key 1394204 1394802 1394806 1395162 1395660 3476, 3477, 3486, 3487 122-Key 1395665 3476, 3477, 3486, 3487 104-Key 1395666 6110668 3180? 6115543 3180? Qty 1 IBM 5642852 for the IBM 5291-1 (the -1 is the rare one) Manufactured 1991-1993

9 years

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DL11 configuration for pdp11gui

by fritzm＠fritzm.org

Hi folks, I've started to look into hooking up pdp11gui to my 11/45 w/ M9301. Does anybody here know how the console DL11 should be configured for this wrt. data bits, parity, stop-bits? I haven't seen this mentioned in the documentation or tutorials. thanks, --FritzM.

9 years

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VT52 oscillator

by fritzm＠fritzm.org

It seems the clock oscillator chip (E1, 13.824 Mhz) on my VT52 is flaking out. It has become very vibration sensitive. I tried reflowing its solder connections, but it has not seemed to help much... Anybody have a spare, or suggestions/advice for a replacement? There's certainly room enough in there to build and mount a small oscillator board if the old/original parts are too hard to find or are all similarly flaky with age at this point. Looking around on the web, the symptoms of the resulting failure mode seem pretty common (no scan, but a slight tap on the right side of the chassis will sometime restore, though I suppose that could be many other things as well!) cheers, --FritzM.

9 years

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No subject

by julian＠twinax.org

9 years

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by julian＠twinax.org

9 years

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by julian＠twinax.org

9 years

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by julian＠twinax.org

9 years

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CDC 6600 - Why so awesome?

by michael.99.thompson＠gmail.com

ate: Fri, 24 Jun 2016 13:43:16 -0400 > > From: Earl Baugh <earl at baugh.org> > To: cctech at classiccmp.org > Subject: Re: CDC 6600 - Why so awesome? > > This thread reminded me that I recently got shipped what the person told me > was a CDC 6000 Central Memory core. > (it matches what's on this page : > http://www.museumwaalsdorp.nl/computer/en/6400hwac.html ). He told me > that > the console looked like this : > http://research.microsoft.com/en-us/um/people/gbell/craytalk/sld031.htm > > Earl > The Computer Museum in Boston gave pieces of the CDC 6600 core to donors. I still have it. -- Michael Thompson

9 years

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DEC Rainbow 100B For Sale, Manchester, UK

by robert.jarratt＠ntlworld.com

I have a DEC Rainbow 100B in the upright pedestal for sale. It comes with 128K of memory, a hard disk controller with hard disk cable, an RX50 drive and the graphics option. It is just the base unit and the pedestal, there is no keyboard, monitor or hard disk included. I collected this machine recently and had to replace the shorted EMI filter on the input of the PSU with something more modern, so it is a working machine. When I have been given a machine for free that I can't keep, then I give it away. In this case, this one cost me money to buy and repair, so this time I am selling it. I would much prefer collection as it is quite large. If I must ship it then so be it, but it may take me a while to find a suitable box to ship it in, and I may have to add that to the cost. Pictures here: https://onedrive.live.com/redir?resid=FC758A5A91B91301!5858 <https://onedrive.live.com/redir?resid=FC758A5A91B91301!5858&authkey=!AC9g74 Lag3CoW5k&ithint=folder%2cjpg> &authkey=!AC9g74Lag3CoW5k&ithint=folder%2cjpg Looking for offers. Regards Rob

9 years

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making music with pdp 11/40

by billdegnan＠gmail.com

anyone make music with the pdp 11/40 or UNIBUS system similar to the PDP 8e music? I was able to get a basic tone pattern into the AM radio today. Not sure how to "write" music, but it's a start. Bill -- @ BillDeg: Web: vintagecomputer.net Twitter: @billdeg <https://twitter.com/billdeg> Youtube: @billdeg <https://www.youtube.com/user/billdeg> Unauthorized Bio <http://www.vintagecomputer.net/readme.cfm>

9 years

2
1
0 0

S/360 Model 30 (?) FS in NC

by jnc＠mercury.lcs.mit.edu

Oooh, if I didn't have an _extremely_ strict rule about 'only PDP-11's' (to prevent my house filling to the gills, and my wife divorcing me :-), I'd be all over that. Someone definitely needs to grab this up! Noel

9 years

4
3
0 0

Y Combinator is restoring one of Alan Kay's Xerox Alto machines

by lproven＠gmail.com

http://www.righto.com/2016/06/y-combinators-xerox-alto-restoring.html Found via: http://www.osnews.com/story/29261/Xerox_Alto_restoring_the_legendary_1970s_… There are 2 videos up so far, with disassemblies that may interest CCmpers. Some people from the list are involved, including Al Kossow, but I haven't seen the link posted. -- Liam Proven ? Profile: http://lproven.livejournal.com/profile Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven Cell/Mobiles: +44 7939-087884 (UK) ? +420 702 829 053 (?R)

9 years

3
4
0 0

S/360 Model 30 (?) FS in NC

by COURYHOUSE＠aol.com

I still have the aluminum bar that says 360 30 that was on the top of the system here in phx. I bought early on in my computer business life segment. Aside from being part of a memento for me and sort of interesting sitting in a glass case... it may need to find its way back atop a 360/30 someday. Ed# _www.smecc.org_ (http://www.smecc.org) In a message dated 6/25/2016 10:57:07 A.M. US Mountain Standard Time, aek at bitsavers.org writes: Maybe a 2841 disk controller, but the 360/30 panel has been pulled. Hard to say what is really there. LCM may be interested in parts for their 360/30, and Will Donzelli has been looking for a 2841 On 6/25/16 10:06 AM, Chuck Guzis wrote: > http://www.vcfed.org/forum/showthread.php?53014-IBM-360-with-additional-era… > > --Chuck > ------------------------------------------------------------- > > "The first thing we do, let's kill all the spammers." >

9 years

1
0
0 0

S/360 Model 30 (?) FS in NC

by cclist＠sydex.com

http://www.vcfed.org/forum/showthread.php?53014-IBM-360-with-additional-era… --Chuck ------------------------------------------------------------- "The first thing we do, let's kill all the spammers."

9 years

2
1
0 0

ACARD ARS-2000SUP versus SCSI2SD - round 1

by swiftgriggs＠gmail.com

Tested using "Raw block speed" test in LIDO 7 under MacOS: [SCSI2SD v5] READ: 891 KB/s WRITE: 728 KB/s [ACARD ARS-2000SUP] READ: 1621 KB/s WRITE: 1277 KB/s More info: The ACARD device contains a Samsung 850 Pro 128G SSD. The SCSI2SD contains a Samsung Pro+ 64GB micro SD and is running firmware v4.6, IIRC. Both are were attached to a Quadra 700 Macintosh running System 8.1 with 68 megs of RAM (4 onboard + 64MB in 16MB SIMMS, the max on the Quadra 700). I had them hooked up at the same time so I could use one to partition the other. The hard disk "driver" was the one provided by LIDO, but I also tried LaCie SilverLining 5's driver as well, but the performace was slightly worse. I tested in LIDO using it's raw speed test feature. It's probably only a rough measure of sequential speed. I just tested three times and averaged the results, but it was within just a few KB/s each time. Once I'm done I'll hook both of these up to a FreeBSD box, dd off full backups, then start over again and try with ZFS under FreeBSD via a PCI SCSI controller. Then again under IRIX if I still have the energy. I'll give some results from 'fio' or 'iozone' under FreeBSD. Those will be a lot more detailed and break down sequential versus random results and show the results of various other permutations. I'd also like to test the SCSI2SD v6, but I can't get my hands on one, yet. The only place that talks about the v6 is the codesrc wiki and the American ebay retailer seems to only have the v5.0. I'll wait, I guess. -Swift

9 years

3
3
0 0

Current source for RX50 media?

by ethan.dicks＠gmail.com

Hi, All, A friend of mine who is mostly into Sun equipment recently purchased a MicroPDP-11 from a State auction. He knows little about DEC gear, but I can help him there. His machine had the RD5X drives pulled by the State, but still has an RX50. Where can I point him to get a handful of RX50 floppies? I can help him with contents to put on them, but he needs media. He's likely to start with RT-11. He could probably use 10-20 floppies to start. Thanks, -ethan

9 years

5
9
0 0

VR241 Stray Wire

by robert.jarratt＠ntlworld.com

I took apart my VR241 recently to see if I could find the reason why the screen doesn't go completely black. I took lots of pictures while doing so, to make sure I could put it back together again correctly. However, now that I am putting it back together, there is one wire which looks like it wasn't connected. It is on the deflection board (on the right when looking from the back of the CRT). I am not sure now if I missed taking a photo of this when it was connected, or if it really should be not connected. There is a pin marked Size Link near to it, which might be where it has to go, and sounds like an optional thing if that is the case. You can see the wire in question at the bottom of the picture below, it is the green wire with a single-pin connector on it, and the size link connector is the two-pronged connector just below it in the photo: https://1drv.ms/i/s!AlQc3lJwQx7bgbAJQx-HsvGY8Gcqsg Anyone know where this wire should go? Regards Rob

9 years

2
3
0 0

options for replacing failed small ROMs in PDP-11

by fritzm＠fritzm.org

Hi All, In bringing up and debugging my PDP 11/45, I found that one of my GRA (M8101) spares has a failed ALU subsidiary ROM. It's a pretty standard little 32x8 ROM in a 16-pin DIP, and the truth table is in the 11/45 print set. I wonder what the replacement options are for parts like these? In particular, given the 30ns micro-cycle on the KB11-A, and the fact that the propagation time for the ALU downstream of this is roughly 20ns on its own, I'd be worried that an off-the-shelf bipolar PROM might be too slow here. I'm still a little slow on reading the microcode flows, so its not clear to me exactly how many micro-cycles there are on the critical path for the E-class instructions where this ROM is used. Maybe its not an issue. Anybody every try replacing one of these with a bipolar PROM? Any other suggestions for how to repair parts like these? cheers, --FritzM.

9 years

10
12
0 0

Wanted: Ann Arbor Ambassador terminal

by jnc＠mercury.lcs.mit.edu

> From: Richard Loken > I have an Ann Arbor Ambassador here with the original owner's manual. If anyone else has _another_ AAA, I'd like one too! (I'm assuming Ian's going to be getting this one! :-) They were wonderful terminals, in their day - the largest screen of any terminal easily available at the time. People in Tech Sq preferred them to VT*, etc for that reason. Noel

9 years

1
0
0 0

options for replacing failed small ROMs in PDP-11

by jnc＠mercury.lcs.mit.edu

> From: Glen Slick > the part is listed as DM8598-AD, where a DM8598 is a 256-bit (32x8) > tri-state bipolar mask ROM. > Some substitute T.S. PROMs include the Signetics 82S123 On my M8101, it's an 82S123, which is a tri-state programmable PROM (the 82S23 is the open-collector version of that chip). Those should be relatively easy to obtain. BTW, quick question: if a fusible link PROM 'fails' because one of the fusible links regrows, is it possible to 're-program' that particular chip, back to the 'original contents'? Some programmers might barf (because they want the chip to be 'empty' to start with'), but maybe one of those home-brew pgrogrammers could 'refresh' the chip (thereby avoiding using up a new chip, when it's not really needed)? > From: Curtis H. Wilbar Jr. > Is there a file containing the image ? I'd really like to accumulate a database of the contents of all the PROM components for all the PDP-11 CPU's. I've got a few of them (for the -11/05), but there are zillions more. Anytime anyone creates one, can you please send me a copy, and I'll try and get them organized and uploaded (and if I _really_ get ambitious, I might try and start filling in the gaps). Noel

9 years

1
0
0 0

CDC 6600 - Why so awesome?

by jnc＠mercury.lcs.mit.edu

> From: Swift Griggs >> Much of the architectural concept was shared with IBM 7030 STRETCH >> (another system worth researching). > Hmm, I've never heard of it. I'll check it out. The first supercomputer, IMO. It's an interesting machine, with a variety of innovations that later became standard: e.g. it has separate instruction and arithmetic units, with the former being in charge of all fetches, both instruction and data, as well as executing things like branch instructions; it also has a primitive form of pipelining ("Interlocks in the look-ahead unit ensure that nothing is altered permanently until all the preceeding instructions have been executed successfully.") Eric has a nice page about it: https://www.brouhaha.com/~eric/retrocomputing/ibm/stretch/ There's a good book about it: Werner Buchholz (editor), "Planning a Computer System: Project Stretch", McGraw-Hill, New York, 1962 Speaking of books, there's also a CDC 6600 book: Jim E. Thornton, "Design of A Computer: The Control Data 6600", Scott, Foresman, Glenview, 1970 Really gotta do that Bibliography! Noel

9 years

4
4
0 0

Grey Wall (VMS) available

by jwest＠classiccmp.org

Someone emailed me last night that has a full set (about 30+) of manuals in grey binders for VMS 5.0. Still waiting for them to respond with their location. This is not something I'd want... J

9 years

5
9
0 0

Wanted: Ann Arbor Ambassador terminal

by ian.primus.ccmp＠gmail.com

It's been a long time since I've asked about this, so I figured it was worth another shot. I've been looking for an Ann Arbor Ambassador terminal for close to fifteen years, with no success. It's kind of an obscure model, but they did exist. I heard of one being available several years back, but, unfortunately, someone else got it before I could. So, does anyone have one of these? Has anyone seen one in recent memory? -Ian

9 years

3
2
0 0

contemplating selling my VT52

by rescue＠hawkmountain.net

I've been saving the VT52 I've owned for years (used it with a modem back in the late 80s to dial into school) with the thought of paring it up with a PDP-8/E, PDP-8/F, or PDP-8/M .... but I don't know that the PDP-8 train will ever stop here. I've come close a couple of times, but have either missed the train on a good deal, or not been in a position to stomach the pricing some of them fetch. So, I'm contemplating selling the VT-52. It has age typical wear, but last time it was powered on, it was working. There was a touchy connection that would act up once in a while requiring a tap on the side to bring it back around (something in the video connection no doubt). I never dug into it to resolve it 100%, as it didn't happen often, and a 'love tap' on the right side always brought it around. I'd like to hang onto it, but it is big. I'm entertaining offers which might sway my decision to keep/sell it. I'm located close to the intersection of Sharon, Easton, and Stoughton, MA. I don't think shipping is an option, unless your willing to pay, and take the risk on something like this being transported. If I can get a big enough box, I can pack it well.... but I'd prefer not to do it due to the risks involved. Keep VT52 in the subject line of any e-mail you send so I can find it easier. Sometimes I may only check mail here once a week, so if you are inquiring and don't hear from me for a while, no fear, I'll get around to you. -- Curt

9 years

1
0
0 0

Teletype on ebay

by dj.taylor4＠comcast.net

There is a Teletype printer on ebay, the seller is in Virginia. Ebay item 231990393069 The auction title is: 1966 - Vintage Antique TELETYPE INKTRONIC Receive Only Set TelePrinter Parallel

9 years

2
1
0 0

KM11 uPB question

by fritzm＠fritzm.org

Hey folks, While working on my 11/45, I built up a KM11 replica based on Tom Uban's ExpressPCB layout. I noticed the following behavior when trying to use it in uPB mode on my KB11-A CPU: * If I set up uPB, set KM11 S1 on and S2 off, and resume execution, the breakpoint fails to stop the processor * BUT, if I depress and *hold* CONT, while it is held down the CPU will be held in T2 on the target microword * If I then reach over and flip on S2 before releasing CONT I can hold the machine there in T2 Documentation on the KM11 seems to imply that the machine should just stop at the target state holding in T2 without having to do the holding-down-CONT-while-flipping-on-S2 thing. I was wondering if this was an oddity of my KM11, my CPU, or is that just the way uPB mode works on these things? thanks, --FritzM.

9 years

1
0
0 0

PDP-11/45 restoration running console emulator

by fritzm＠fritzm.org

Just wanted to share some joy here: after a months-long spare time restoration and debug process, the PDP-11/45 I've been working on booted to the M9301 console emulator last night (pic at http://fritzm.github.io/images/pdp11/m9301-running.jpg). Made me super happy to see that register dump an the "$" prompt :-) Next up will be using PDP11GUI to run more thorough diagnostics, then I'll be moving on to storage (RK05)... cheers, --FritzM.

9 years

3
5
0 0

Force SPARC/CPU-5V-64-110-2 available.

by mattislind＠gmail.com

I have two Force VME boards with microSPARC CPU which I have no use for. SPARC/CPU-5V-64-110-2. 110 MHz. 64 Mbyte. https://imgur.com/a/4GWqB Trade for something interesting. /Mattis

9 years

1
0
0 0

Model M Key Cap Replacement WAS: Keyboards and the Model M (was Re: NEC ProSpeed 386)

by cctalk＠ibm51xx.net

While on the subject anyone know where one can buy replacement key caps?? -Ali

9 years

10
15
0 0

old friend is slimming down the warehouse

by connork＠connorsdomain.com

On Jun 24, 2016 1:11 PM, Jay West <jwest at classiccmp.org> wrote: > > Mike wrote... > ----- > ??? HP 262x terminals don't ship well.? The "ET" terminals must be packed > carefully. > ---- > That is very true. I could use one of those large black plastic pieces that > hold the monitor open. Mine broke'ted. > If you have the broken pieces and or a complete one I could possibly model it and 3D print it depending on size... We have the technology ;) -Connor K

9 years

1
0
0 0

CDC 6600 - Why so awesome?

by earl＠baugh.org

This thread reminded me that I recently got shipped what the person told me was a CDC 6000 Central Memory core. (it matches what's on this page : http://www.museumwaalsdorp.nl/computer/en/6400hwac.html ). He told me that the console looked like this : http://research.microsoft.com/en-us/um/people/gbell/craytalk/sld031.htm I got it along with a box other parts (mostly Sun things) and a single "plane" of core memory from another module. (It connects the 6000 to the Sun 1's that I picked up in the past... some interesting history...good "over a beer" stories :-) ) I'm coming to VCF MW this year so if there is interest, I can bring it along... Earl

9 years

1
0
0 0

acoustic coupler/modem available

by jwest＠classiccmp.org

Spotted this at a local surplus place today. it's an acoustic coupler/modem, white plastic case, manufacturer is "MI2" (with the 2 as a superscript, so I guess "MI Squared"). Never heard of them. No clue if it works, appears to be in fair condition, they have a price tag of $25 on it. J

9 years

1
0
0 0

old friend is slimming down the warehouse

by stark＠mit.edu

You guys must have much larger apartments (or houses I'm guessing) than me.... I would really like a vt220 largely because it seems like it wouldn't occupy much space. I'm guessing they withstand shipping better too. -- Greg

9 years

1
0
0 0

Other then being original is there any reason to get a RX02 ?

by pete＠petelancashire.com

Someday I want to have a PDP11 even if it is a QBUS version I can get a clean RX02 for about $150. When my life involved PDP11's starting with 34A and ending with 44's I never used one. -pete

9 years

4
5
0 0

Tektronix terminals and terminals in general (Re: CDC 6600 - Why so aweso...

by COURYHOUSE＠aol.com

Heh! Especially if an upper case only terminal I can just imagine the cry arising from the little whiners! QUIT SHOUTING QUIT SHOUTING! (as they stamp their feet and rent their clothing....) In a message dated 6/24/2016 7:50:46 A.M. US Mountain Standard Time, emu at e-bbes.com writes: On 2016-06-24 08:23, Swift Griggs wrote: > However, I think most folks these days would faint if they were forced to > work on a terminal. Just don't tell them, that they do ;-) If you really think about it, the terminals just got faster and got more colors. (and you call them smartphone, thin clinet, tablet, win PC, ...) Otherwise: a.) most data is somewhere in the cloud (before it was called mainframe) b.) a lot of applications are running in the cloud (before, mainframe) c.) you connect now via wireless internet (before: modem) d.) ... So, just Emperor's new clothes ;-)

9 years

1
0
0 0

CDC 6600 - Why so awesome?

by swiftgriggs＠gmail.com

To my sorrow, I'd never heard of the CDC 6600 and I barely knew who Control Data was (whippersnapper, I know). I see a lot of traffic about them on the list and I went out to discover "why so cool?" Wikipedia and other spots talk about the features, but I'm trying to understand from folks who put hands to the metal, why they liked them so much. I'm a total igmo concerning this bit of kit. Is this about right? - It has dual "calligraphic" displays. Geeze! Very freakin' cool - It was RISC nearly before folks could even articulate the concept - It had some wicked cool "demos", to cop a C64 term. (ADC, PAC, EYE) - It wasn't DEC and it wasn't IBM and it was faster than both when it hit the street? - It has a cool OS? Dunno. Not much info on "SCOPE" - Made in the USA baby! Back when we actually made things. - It used odd sized (by todays standards) register, instruction, and bus sizes. 60 bit machine with 15/30 bit instructions. But, didn't it cause a bunch of alignment issues for you ? I dug into the CPU instructions for about 20 minutes and it was actually pretty straightforward. The so-called "COMPASS" ASM code was oh-so-cool. I can't believe they had so many of the features now considered "modern" or "clever" (at least by me) in the 1960s! This code: https://en.wikipedia.org/wiki/COMPASS/Sample_Code ... Is super-readable, in fact, probably a bit more than several much-newer dialects on different platforms. There was one instruction "PROTECT" I found pretty interesting, too. Was that similar to noodling with the control registers CR0, CR2, CR3, and CR4 on x86 to mark memory protection from segmentation violations? I remember that being the protection mechanism on my 386 SX/16 (and I remember it being a PITA), however the COMPASS "way" looks much easier/cooler and must have some hardware assistance to do that so easily. -Swift

9 years

17
47
0 0

LINC-8 and PDP-8 manuals

by mattislind＠gmail.com

I have been going through our library of documentation and found some items that are duplicates. There are a LINC-8 programming manual, PDP-8 DecTape programming manual, PDP-8/L maintenance manual, PDP-8/e maintenance manual volume I and volume III. http://i.imgur.com/YEAdnZV.jpg?1 http://i.imgur.com/pvsypvY.jpg?1 Trade for something interesting! Other things that is also for trade: http://www.datormuseum.se/available /Mattis

9 years

2
1
0 0

Forth for RSTS

by paulkoning＠comcast.net

> On Jan 3, 2016, at 4:56 PM, Paul Koning <paulkoning at comcast.net> wrote: > > ... > This Forth implementation is a port of Fig-FORTH by John S. James, with some RSTS-specific magic added. I just realized the file header says that it is in the public domain, so I suppose I should post the source... Done. Thanks to Al Kossow, it now lives on Bitsavers, in bits/DEC/pdp11/forth/forth.mac This is the RSTS run-time system, from V9.6 and later. I haven't tried building it on older versions; the comments say it works back to V7.2. I don't remember why that version is mentioned. Run time systems existed before then, though a few details did change over time. The original version was for RSX and RT-11. I did the RSTS port, and Kevin Herbert added some more stuff to it later on. The biggest change is to make the vocabulary machinery match the ANSI Forth 83 standard, which allows for lots of separate vocabularies and arranging their search order. This was needed to allow SDA to define a set of 32 bit replacements for the standard (16 bit) arithmetic operators of native Forth, without getting itself all confused. Build instructions are in the comments near the top of the file. There's very little to it. Enjoy. paul

9 years

1
0
0 0

PDP-11/40 modified to be a PDP-11/23

by COURYHOUSE＠aol.com

now, there is a 11/23 I could love! ---Ed# In a message dated 6/22/2016 9:44:20 P.M. US Mountain Standard Time, glen.slick at gmail.com writes: BACKPLANE", > so the operation is not so mysterious. I had never seen a hex-wide Q-bus > backplane before this. > > There are some pictures of the system and the Q-Bus to 11/40 front panel > interface here: http://www.ricomputermuseum.org/Home/equipment/dec-pdp-1140 >

9 years

1
0
0 0

How do they make Verilog code for unknown ICs?

by swiftgriggs＠gmail.com

In my recent studies of electronics (I'm a noob for all practical purposes) I keep seeing folks refer to Verilog almost as a verb. I read about it in Wikipedia and it sounds pretty interesting. It's basically described as a coding scheme for electronics, similar to programming but with extras like signal strength and propagation included. Hey, cool! Why are folks referring to "Verilogging" and "doing a verilog" on older chips. Is there some way you can stuff an IC into a socket or alligator clip a bunch of tiny leads onto it and then "map" it somehow into Verilog? Is that what folks who write emulators do? Ie.. they exhaustively dump Verilog code for all the chips then figure out how to implement that in some computer programming language like C ? What do folks do for ROM chips and PLCs? I'd think they must dump the code and disassemble it. No? I'm just curious and this is a tough question to answer with Google since I'm pretty clueless and don't know the right words to search for. I notice people talk about correcting their Verilog code, so it must be somewhat of a manual process. I'm just wondering how someone even gets started with a process like that. -Swift

9 years

16
47
0 0

where to find DEC ECO's for KB11-A?

by fritzm＠fritzm.org

Are DEC ECO's available online anywhere? I have not seem them in the usual places e.g. bitsavers... I am particularly interested in ECO's related to the KB11-A (11/45). thanks, --FritzM.

9 years

6
6
0 0

PDP-11/40 modified to be a PDP-11/23

by michael.99.thompson＠gmail.com

On Tue, Jun 21, 2016 at 9:05 PM, Michael Thompson < michael.99.thompson at gmail.com> wrote: > The RICM just picked up a PDP-11/40 chassis that was modified to accept a > PDP-11/23 board set. It also contains a custom board to interface the > PDP-11/23 to the original PDP-11/40 front panel. It is quite an > accomplishment to get the Q-Bus board set working in the Unibus chassis. > I looked at the backplane pictures that I took after the rescue. I assumed that the hex-wide 8-slot backplane in the front of the card cage was the original 11/40 processor backplane. On the back it says "LSI 11 BACKPLANE", so the operation is not so mysterious. I had never seen a hex-wide Q-bus backplane before this. There are some pictures of the system and the Q-Bus to 11/40 front panel interface here: http://www.ricomputermuseum.org/Home/equipment/dec-pdp-1140 -- Michael Thompson

9 years

3
2
0 0

CYBER-171

by bryan＠bceassociates.com

Wondering if anyone out there has such a machine running. It was literally the first computer system I used (at Indiana State University back in the 70's). I had some real fun doing FORTRAN and Pascal programming on that thing. Thanks, Bryan

9 years

1
0
0 0

Programming for the Alto's Mesa

by paul＠mcjones.org

> I just looked in some boxes I haven't opened in decades. I have "Mesa > Language Manual, Version 5.0, April 1979". If the people with the Alto > need this, let me know. It?s been scanned: http://www.bitsavers.org/pdf/xerox/mesa/5.0_1979/documentation/CSL_79-3_Mes… > ... Mesa was a hard-compiled language, but it had concurrency, > monitors, co-routines ("ports", similar to Go channels), strong type > safety, and a sane way to pass arrays around. ... The designers of the concurrency mechanisms (Butler Lampson and Dave Redell) wrote an excellent paper, which can be downloaded from Lampson?s web site: http://research-srv.microsoft.com/en-us/um/people/blampson/23-ProcessesInMe… > Anyone here know or remember Mesa? I'd like to hear more about it. Thanks to the foresight of Al Kossow and others, the Computer History Museum has a repository of Alto source code online, including the Mesa system and some applications such as the Laurel electronic mail client and the Grapevine distributed mail transport and name service. (The repository also includes a lot of BCPL and a small amount of Smalltalk.) The repository is here: http://xeroxalto.computerhistory.org Probably better to start here: http://www.computerhistory.org/atchm/xerox-alto-source-code/ http://xeroxalto.computerhistory.org/xerox_alto_file_system_archive.html Paul McJones

9 years

3
2
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test-drb June 2016