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

by cctalk＠snarc.net

The pre-production Apple 1 auctioned via CharityBuzz and displayed at VCF West closed just now for $1,210,000. Blows away the old record of $900-something. Amazing!!!

9 years, 10 months

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RQDX3 disk image for Gesswein's MFM emulator

by chd＠chdickman.com

I am looking for an RQDX3 compatible disk image for Dave Gesswein's MFM disk emulator. I don't have a functional disk to image and the ZRQCH0 won't cooperate.

9 years, 10 months

3
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PATA HBA and drive wanted

by t.gardner＠computer.org

Hi: I'm looking for a PATA host bus adapter card (either ISA or PCI) and a PATA drive preferably UDMA/33 but no later than UDMA/100. This would probably come from a system built in the mid-1990s before the PATA interface got embedded into the chip set. It might even be from an older system that was upgraded by replacing an ST412 HBA and drive with and EIDE HBA and drive. Will rent, buy or borrow as appropriate Contact me off line Tom Gardner (650) 941-5324 t.gardner at computer.org

9 years, 10 months

1
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PDP-8 diagnostic tests

by scott.l.baker＠gmail.com

Hi, I have written a PDP-8 VHDL model and I have it running in an FPGA https://github.com/scottlbaker/PDP8-SOC At this time it has passed a basic DEC diagnostic instruction test but I found some interesting things when getting that instruction test to pass. For example: The following segment of code implies that IAC instruction affects the Link bit 1797 /GROUP 1 OPERATE TEST 33 1798 02626 7300 CLA CLL /AC=0000 LINK=0 1799 02627 1053 TAD K2525 /AC=2525 1800 02630 7261 CLA CMA CML IAC /TEST COMBINATION 1801 02631 7420 SNL 1802 02632 7430 SZL 1803 02633 7402 HLT /CLA CMA CML IAC FAILED, AC SHOULD 1804 /BE 0000, LINK SHOULD BE ZERO but the PDP-8 Handbook ; DEC copyright 1966; page 14 says nothing about the Link bit being affected by the IAC instruction. The simh PDP-8 simulator also shows that L is affected by IAC. If I change this test line from 1800 02630 7261 CLA CMA CML IAC /TEST COMBINATION << link=0 to: 1800 02630 7261 CLA CMA CML /TEST COMBINATION << link=1 Can anyone point me to: 1) DEC documentation which more fully describes all the instruction set (in more detail than the PDP-8 handbook) 2) Some more instruction tests in assembler source code format. I have found lots of binary files but I would prefer assembler source code format. I am using a pal compatible cross assembler. Thanks and Regards, Scott

9 years, 10 months

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"Unix Implementation" paper in HTML

by jnc＠mercury.lcs.mit.edu

So, I'm hoping someone can help me with a minor mystery. At same point, I ran across, and saved, this: http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/BSTJ_July-August_1978.htm which is a very nice HTML recreation of the famous first BSTJ Unix issue. Notice that it contains links to online HTMl versions of two of the papers; the basic Unix paper (the one that was famously in CACM), and "UNIX Implementation" by Ken Thompson. Alas, I appear not to have downloaded and saved the 'Unix Implementation' paper; I have searched high and low on my machines, and no sign of it. Double alas, because it doesn't seem to be online anywhere either! I have found a PDF version online, and also the NROFF source, but not this HTML version. I just don't recall exactly where I found this, so I can look in the Wayback Machine for the HTML. I _thought_ it might have been from Ken or DMR's Web page, so I found both of them in the Wayback Machine, but in sampling them both over the years, neither one seems to have had this. (And the Wayback machine doesn't have a search function that I know of, to search for it directly.) So does this page ring any bells for anyone, or alternatively, has anyone saved the HTML version "Unix Implementation"? (Yes, I know it's no biggie, with the PDF version available, I'm just being anal.... :-) Noel

9 years, 10 months

7
10
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Turbo Pascal v3.01a for CP/M...

by geneb＠deltasoft.com

I'm looking for a copy of Turbo Pascal 3.01a for CP/M - specifically a disk image. I know there's tons of copies in individual-files-in-a-zip form, but I'd like to get an original disk image. (I've got a problem with TINST on one of my machines and I want to ensure it's not bit rot on the behalf of TINST or the data files it uses.) Disk image format isn't that important as I can use various tools to extract the files. Zipping up the files from an original disk would work as well. Thanks! g. -- Proud owner of F-15C 80-0007 http://www.f15sim.com - The only one of its kind. http://www.diy-cockpits.org/coll - Go Collimated or Go Home. Some people collect things for a hobby. Geeks collect hobbies. ScarletDME - The red hot Data Management Environment A Multi-Value database for the masses, not the classes. http://scarlet.deltasoft.com - Get it _today_!

9 years, 10 months

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PDP-8/i Panel Pics

by rodsmallwood52＠btinternet.com

Hi Guys I sent out a photo of the new PDP-8/i with a real one for comparison to everybody who might be interested. If you did not get the email and would like one please let me know Rod (Panelman) Smallwood

9 years, 10 months

1
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Differences between the PDP-11/15 and PDP-11/20

by jnc＠mercury.lcs.mit.edu

> From: Paul Popelka > I was wondering how much delay the KT-11B introduces. That's a _very_ interesting question; AFAIK, the documentation doesn't say. If there's a cache miss, of course, there's one memory cycle delay to load it. If the cache hits, though, there's still added gate delays going through the KT11 - perhaps 20-30 or so (to make a complete guess) - at ~10nsec each, that would be an extra 200 nsec per memory cycle. Not insignificant... > There is still the actual implementation of the KA11 changes that can > be reverse engineered if someone is so inclined. Well, that might not be trivial - if the boards have ECOs, it may be hard to tell them from the KT11 changes. The sheet which gives the wiring changes for the KA11 backplane _is_ still there - although there are indications on it that the actual machine differs from the prints! Wheee! :-( Noel

9 years, 10 months

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BEL constant in MAINDEC-8E-D0AB-PB

by pontus＠Update.UU.SE

Hi I've been running and looking at the PDP-8/E INSTRUCTION TEST 1. And it is supposed to write the BEL (07) character after each round of passed tests. However the code loads and outputs the constant "0207", which is 07 with the eigth bit set. I think the 8/E serial interface outputs all eight bits in this case? I suppose a real ASR-33 would ignore the eight bit? Why does the code not load 07? Thank you, Pontus.

9 years, 10 months

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DEC Indicator Panels page

by jnc＠mercury.lcs.mit.edu

> Oooh, thanks ever so much for turning that up!!! OK, I have added them to the page - I lost a little resolution rotating them to be level, but there's still more than enough to recogize them, and mostly read them. > So that mystery panel seems to be a general panel, more associated with > the CPU than anything else; one line does seem to be the reader, but > one quadrant is the KT15 memory management, one is the KA15 priority > interrupt system, and there's general CPU/system stuff throughout With that, I think we have most of the PDP-15 panels (although the VT15 image is still pretty crummy). That leaves only these two: http://www.simulogics.com/nostalgia/DEC/15_05.jpg although that looks like early marketing material, so perhaps those panels neve made it into production machines? I wonder if one of them is a BD15 (whatever that might be) - or if that's the name for the CPU panel (above)? Noel

9 years, 10 months

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Differences between the PDP-11/15 and PDP-11/20

by paulp1＠gmail.com

> From: Noel C. > Was the Computer History Wiki thing of any use? Yes. It answered a little of what I was wondering about. It mentioned that there is a cache of page table entries. I was wondering how much delay the KT-11B introduces. > > Does anyone know if schematics for it were included in the auction? > > If the schematics are available, are there plans to get onto bitsavers? > The answers apparently are yes, and yes - although there are two parts to the prints (the KT11-B itself, and the KA11 changes), and it seems that unfortunately there's (at least) one page missing from the 'KA11 changes' part. Oh well. There is still the actual implementation of the KA11 changes that can be reverse engineered if someone is so inclined. I'm just glad the winner of the auction is willing to make available the information they did get.

9 years, 10 months

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X server for original PC (8088/8086)

by seefriek＠gmail.com

From: tony duell <ard at p850ug1.demon.co.uk> > On Fri, Aug 19, 2016 at 5:56 PM, Steven M Jones <classiccmp at crash.com> wrote: >> >> Before anyone gets too excited about the blistering speed of the 60 >> MHz TMS34010, ... However, since it has a >> graphics-optimized instruction set, it was still able to do some >> things noticeably faster than the 16 MHz 80186 would have. Price/performance for the tms34010 was terrible; it was somewhat faster at graphics (bit-oriented) ops than an 80186 (or other contemporary processor), but it was several times more expensive. TI tried to sell around that by claiming it was a complete general purpose processor in addition to graphics processor so you could build a whole system using the tms34010 as the brains. Unfortunately, if you actually did that, you found that it could manage kbd/mouse/net *or* do graphics, but not really both. It was also integer-only, and had a slow, 16-bit memory interface that killed performance unless you used expensive VRAMs (this was before VGA made VRAM cheap). And TIGA never really took off. Bonus: the development tools were pretty awful. One of the weirder C compilers I've used. Intel came up with the i82786 around the same time that was cheaper, and it looked like you could cook up a cheap 80186+82786 X Term setup that would be competitive. However, I never saw a product like that, just a couple of PC/AT plugin cards (Belltech BLIT). > Somewhere I have a thing badged 'Princeton Ultra-X'...It uses an 80188 for I/O > (including 10Mbps ethernet). The Xserver is in EPROMs and appears to run on > the TMS34010 graphics processor. Yup...I worked for the company that designed those. Good times (really...I learned a *lot* about a lot of things), but glad I was an ops guy and not an engineer or developer. There were probably 20 other shops making X Terminals at the same time, 'cause that was the future. I recall having stacks to play with because the market for them evaporated far sooner than marketing predicted. KJ

9 years, 10 months

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cctalk Digest, Vol 26, Issue 20

by seefriek＠gmail.com

From: Zane Healy <healyzh at aracnet.com> > > I tend to think that X11 over serial would be nothing short of nightmarish. > I ran X over an ISDN 64K link with 19.2Kbps backup for years in the late 80s/early 90s, and it was pleasantly usable enough to be my daily remote work access. Admittedly, Framemaker was a bit of a pig over it, and we weren't web browsing pages filled with 500KB of JS and images. KJ

9 years, 10 months

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What is the KH11-A? (was Re: Differences between the PDP-11/15 and PDP-11/20)

by ethan.dicks＠gmail.com

On Sun, Aug 21, 2016 at 1:53 PM, Noel Chiappa <jnc at mercury.lcs.mit.edu> wrote: > http://gunkies.org/wiki/KA11_CPU Interesting stuff on the KT11, but tangentally, I've been going over my pile of parts (that I've described a few times over the years) from an 11/20 I pulled from the dumpster at work 30 years ago. I finally got around to photographing the module handles and inventorying many of the boards and I've learned a thing or two and have generated a question or two. First, the manufacture date for most of the parts is in 1972. The front panel says "11/20", so that all jibes. I appear to have a CPU (more below), an M7800 DL-11 console interface (not the older multi-board KL-11), a lot of MM-11 4K core sets, and a happy surprise (again, more below) and not much else from that extraction (no bootstrap card, for example, or peripheral adapters). Second, many/most of the CPU modules are -YA variants, and the "PDP-11 Field Guide" mentions that they would be part of a KH11-A. About the only description I can find for what that is, is a single mention (in PDP-11_PeripheralsHbk_1973.pdf) of the "large-system capability option" related to the DT03-F Unibus switch requirements. Anyone know what this is? I'm reasonably certain it doesn't matter for my needs, but I'm curious. Third, the happy surprise is a full set of boards for a KE11-A. I have been sniffing around for a KE11-B (single-board version), and now, I don't need to (as long as this one works or can be repaired). This excellent for me since my goal all along has been to fire up enough hardware for Warren Toomey's reconstruction of ~1972 UNIX (v1 kernal plus v2 utilities). Yes, I know I can run that on SIMH (I have), even wrapped up in a Docker (I will), but I've wanted to run it on the real hardware for 11 years and I'm one step closer. I have a RK11-D that works, and an RK11-C that will likely require much attention (never tried to use it), so the only thing I'm really missing (besides enough time to repair/debug all of this) is something to emulate an RF11 for the swap disk. I'm now doubly sad that I lost my Diablo 30/RK03 in a flood 25 years ago, but I'll be functional with an RK05 or two. Fourth - I don't think I got the H720 power supplies with this (or the fans) - that was what I think was removed prior to this unit hitting the dumpster. I may have the G772 power cards (and then again, I may not), but those wouldn't be hard to reproduce. I am entirely satisfied with modernish switching supplies, but I see the H720 puts out about 15A of +5V and -15V, plus -22V for the core and +8V for the front panel bulbs. The bulb voltage is probably no big deal to come up with, but -22V is a bit of an oddball. I'm also willing to forego 100% core in favor of MOS memory, including any modern repros that come out in the next year or two. To start, finding even one H720 to run the CPU box (I have 2 more boxes for the rest of the memory) would be enough to get going. So... for now, as I continue to pull the parts together, my real question is, what is a KH11-A? Thanks for any enlightenment. -ethan

9 years, 10 months

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What is the KH11-A? (was Re: Differences between the PDP-11/15 and PDP-11/20)

by jnc＠mercury.lcs.mit.edu

> I recall reading _somewhere_ about some early PDP-11 memory management > thing used on early PDP-11 Unix that supported the KE11 ... by having a > small window that allowed user code access to the KE11. ... > Does this ring any bells for anyone? Never mind - found it, it was in "Odd Comments and Strange Doings in Unix": https://www.bell-labs.com/usr/dmr/www/odd.html The memory management thing in question was the KS11; I looked, but could not find anything about it. Does anyone know of anything? Noel

9 years, 10 months

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What is the KH11-A? (was Re: Differences between the PDP-11/15 and PDP-11/20)

by jnc＠mercury.lcs.mit.edu

> From: Ethan Dicks > Second, many/most of the CPU modules are -YA variants, and the "PDP-11 > Field Guide" mentions that they would be part of a KH11-A. About the > only description I can find for what that is, is a single mention .. > of the "large-system capability option" related to the DT03-F Unibus > switch requirements. Anyone know what this is? I've been told that it's a revision to the CPU timings to reduce NPR latency, although I have no details; I had previously looked online, and was not able to locate anything about it. > a full set of boards for a KE11-A. I have been sniffing around for a > KE11-B (single-board version), and now, I don't need to (as long as > this one works or can be repaired). Doesn't it need a custom backplane too? Do you have that? > my goal all along has been to fire up enough hardware for Warren > Toomey's reconstruction of ~1972 UNIX Maybe someone here can scratch a mental itch for me; I recall reading _somewhere_ about some early PDP-11 memory management thing used on early PDP-11 Unix that supported the KE11 (which is a memory-mapped device) by having a small window that allowed user code access to the KE11. IIRC, it was a DEC thing, not something home-rolled at Bell. Does this ring any bells for anyone? Noel

9 years, 10 months

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

by jnc＠mercury.lcs.mit.edu

> From: Ethan Dicks > Any updates on this? I have a much-annotated copy of the list, and had reached out to Megan about sending it to her, but I fell into a hole, and never got to it. Maybe I should check out all my changes, and get moving on that. One question: I was using the list to sort through all the stuff that showed up on eBait, so I wound up adding a bunch of VAX M-series boards, on the basis that if the listing didn't include a photo (so that one could see that it was a so-called 'super hex' board (i.e. deeper than usual), it was impossible to tell them from PDP-11 M-series boards. (And IIRC the /730 boards are the same length as PDP-11 boards?) Was that a good call, or should I have left them out? (I left out all PDP-8 boards, since they are already in another list.) Noel

9 years, 10 months

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Differences between the PDP-11/15 and PDP-11/20

by jnc＠mercury.lcs.mit.edu

> From: Paul Popelka > Thanks for posting that the KT-11B documentation is available. Sure. Was the Computer History Wiki thing of any use? > Does anyone know if schematics for it were included in the auction? > ... > If the schematics are available, are there plans to get onto bitsavers? The answers apparently are yes, and yes - although there are two parts to the prints (the KT11-B itself, and the KA11 changes), and it seems that unfortunately there's (at least) one page missing from the 'KA11 changes' part. Noel

9 years, 10 months

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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

9 years, 10 months

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FTGH: miscellaneous old stuff

by mouse＠Rodents-Montreal.ORG

I've got a bunch of old stuff I want to get rid of. Much of it is squarely on-topic here; most of the rest is tangentially on-topic, and I hope the remainder can be forgiven. All this stuff is in Ottawa, Ontario, Canada, and is yours if you come pick it up. In theory, I could ship, but I suck at actually getting stuff shipped. Except as noted, these are functionality unknown. I don't _think_ any of these have been robbed for parts, but it's possible (least unlikely for the vacuum-tube devices). Details may be incorrect; at least two human-layer copies were involved in everything here and I'm tired, so miscopying is not at all out of the question. In no particular order: Two TK50 tape drives. These are just the drives, no controller cards or enclosures. One mechanical (not even electromech) typewriter. Aside from generic interest in such things, the major reason people here might care about it is that it has the C= logo prominently visible on it. (Not just a sticker; if this is an aftermarket addon, it is a very well-done one.) One arc-welding helmet. It is made of fibreglass and is somewhat cracked, but still entirely functional. Four SparQ 1.0 tapes. Contents unknown. A power supply. It is marked as a Sun 300-1047-05; it is Zytec-branded, marked as a ZYRISE 925W unit, Zytec part number 22903110. It is marked as being limited to 150A on +5V, 15A each on -5.2V and +12V, and 10A on -12V; the +12V is also marked "25A PK FOR 20 SEC". But it is marked as max total power 925W, and needing 60CFM forced air cooling. The connector is nothing I recognize; it's the kind of custom thing I'd expect for a PS that can push 150A.... One HP 211A, a SQUARE WAVE GENERATOR, serial #2707. This is test gear >from the vacuum tube era. Two HP 202A LOW FREQUENCY FUNCTION GENERATORs. Based on the controls, these are capable of sine, triangle, and square waves from, IIRC, about .01Hz to something like 1200Hz. These also date from the vacuum tube era. An "ALLEN B DUMONT LABORATORIES" oscilliscope, model 304 H, serial 5484. An HP 400D vacuum-tube voltmeter. A Beckman/Berkeley model 5230 "UNIVERSAL EPUT? AND TIMER", whatever that is. The most visually notable feature is that it has four display columns with ten digit positions in each one, presumably with a lamp behind each position. Various magnetic media. Figuring most prominently are QIC tapes, TK50s, and 5?" floppies. Some of the "TK50"s might actually be some other tape in the same form factor, but if I had to guess I would guess not. Most/all of the tapes are in plastic cases; the floppies have paper jackets and/or cardboard boxes around them. Contents unknown, though at least some have labels. For the labeled media, I hope to get the labels transcribed sometime over the next week or so. If/when I do that I'll post the results. /~\ The ASCII Mouse \ / Ribbon Campaign X Against HTML mouse at rodents-montreal.org / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B

9 years, 10 months

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Differences between the PDP-11/15 and PDP-11/20

by paulp1＠gmail.com

Thanks for posting that the KT-11B documentation is available. Does anyone know if schematics for it were included in the auction? The flip chip board complement for it is in the posted document but nothing else. If the schematics are available, are there plans to get onto bitsavers? Paul Sent from my iPad

9 years, 10 months

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X server for original PC (8088/8086)

by cmhanson＠eschatologist.net

Back in the day, did anyone produce an X11 server for DOS-based 8086/8088 systems, say with support for Hercules or CGA graphics? Or was that strictly a 286-or-better thing, given the overall constraints of the 8086 architecture? (There were plenty of mouse-and-window systems for the PC/XT back then, I expect black & white X11 over a serial link would not be *that* bad?) -- Chris

9 years, 10 months

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Differences between the PDP-11/15 and PDP-11/20

by jnc＠mercury.lcs.mit.edu

> I'm not sure how the KT11-B works, but my _suspicion_ ... is that it's > not part of the CPU, but a UNIBUS device So, I wuz wrong. The Option Description (part User Manual, with a little bit of Technical Manual thrown in) is now online: http://bitsavers.trailing-edge.com/pdf/dec/pdp11/1120/KT11-B_OD_Apr71.pdf Having looked through it, the KT11-B is a far more impressive beast than I thought: there are -11/20 KA11 CPU processor mods to provide User and Exec mode (i.e. real hardware time-sharing) - there is in fact another cable between the CPU and KT11-B, it did not show up in the pictures, I guess - and the memory mapping is paging, with page tables kept in core. (Just like a junior KI10...) Using the OD, I have prepared a page in the Computer History for it: http://gunkies.org/wiki/KT11-B_Paging_Option which gives (I modestly claim :-) a clear and concise overview of how the whole thing works. (The details are all there in the DEC document, but scattered throughout, in dribs and drabs.) The DEC thing will be a much easier-to-grok read if you've read this first, I reckon. The OD does contains some minor details that aren't in the Wiki page (e.g. you apparently can't modify the CPU's priority in User mode), so if you're really interested in the thing, read the OD too. A couple of observations: First, it does not contain anything like SSR1 in the standard PDP-11 memory management, which records which registers have changed, and by how much, on an instruction which gets a fault. It does record a couple of internal KA11 major state bits: http://gunkies.org/wiki/KA11_CPU which do allow one, after examinging the instruction which faulted (the address of which is provided in a KT11-B register), to work that out (unlike the -11/40, in which some instructions cannot be restarted because the CPU just doesn't keep enough data around). Still, the code to handle faults is going to involve parsing the instruction (like m40.s in V6 UNIX, if anyone cares), to make use of those recorded CPU state bits. Second, for some reason a TRAP instruction in user mode traps to user mode, not kernel! This would be a massive PITA for Unix, which uses the TRAP instruction, for details I won't bore you all with (unless someone cares). Noel

9 years, 10 months

1
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Microvax II hardware not recognized

by dj.taylor4＠comcast.net

I've brought up a MicroVax II and installed VMS 5.5-2 on a SCSI2SD disk and it is fun to work with. (I also installed openvms 7.2 without much drama) The problem I am having is that is has a TK50 tape drive and controller, but it never has shown up in the device list. I even swapped in a different controller. The DHV11 did show up initially but has now disappeared from the device list. Did I do this by removing boards and putting them back in? A RQDX2 board was put back in at a secondary CSR address and that shows up (it is connected to an RX50 which shows up in the device list). Does Autogen recognize new hardware? Doug

9 years, 10 months

8
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6800 CDAT memory diag help

by vintagecomputer＠bettercomputing.net

Thanks Michael!?I did read through those but I'm still getting used to operating the 6800 and am still a bit confused. ?If I want to confine the program to a certain address range, say $0000 to $1111, is the most significant byte of $0000, 0? ?As well as least? ?And then 1 and 1 for the higher address? ?And I'm assuming I set that using the M (addr) command? Thanks!!! Sent from my Samsung device -------- Original message -------- From: Michael Holley <swtpc6800 at comcast.net> Date: 2016-08-20 9:12 PM (GMT-08:00) To: "'General Discussion: On-Topic and Off-Topic Posts'" <cctalk at classiccmp.org> Subject: RE: 6800 CDAT memory diag help Here is the instructions for memory tests, CDAT is on page 3. http://www.swtpc.com/mholley/swtbug/MemoryDiagnostic.pdf The CDAT memory diagnostic can be used to help locate memory problems in a SWTPC 6800 computer system that MEMCON and ROBIT may miss. The program itself resides entirely within the 128 byte SWTBUG? RAM. The program must be loaded in two parts to avoid interfering with the systems push down stack. The contiguous section of memory to be tested is set by loading the most significant byte of the lower memory address into A002, the least significant byte into A003, the most significant byte of the upper memory address in A004 and its least significant byte in A005. The low address must be less than or equal to the upper address. The test starts from the low address and writes a 00 into all memory up to the high address. An FF is then written into the first address and all other locations are checked to be sure they contain 00. If all are OK the FF is replaced with a 00 and an FF is written in the next memory location. This pattern continues until all memory is checked or an error is found. If the computer returns to SWTBUG?, then no errors were found. ?????? NAM??? CDAT-2? ???? *MEM DIAGNOSTIC (JOHN CHRISTENSEN'S) ?????? *MODIFIED FOR MIKBUG AND SWTBUG OPERATION E0E3?????????? CONTRL? EQU??? $E0E3 A002???????????????????????????? ORG??? $A002? A002?????????? LOTEMP? RMB??? 2???????? STARTING ADDRESS? A004?????????? HITEMP? RMB??? 2???????? ENDING ADDRESS Michael Holley -----Original Message----- From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Brad H Sent: Saturday, August 20, 2016 12:49 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: 6800 CDAT memory diag help ??? Hi there, I'm still having some glitches with my 6800 system and would like to do a proper RAM diag.? From reading, it seems like CDAT is the most exhaustive.. but I cannot get it to run.? I can load and then run it.. but it immediately fails at address 8000.? Since I understand this is used for I/O I am wondering how I would adjust CDAT so it ignores that space and does everything else?? Any suggestions would be most appreciated.? I think you can alter the addresses with most and least significant bytes but don't understand quite how. Brad Sent from my Samsung device

9 years, 10 months

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6800 CDAT memory diag help

by vintagecomputer＠bettercomputing.net

Hi there, I'm still having some glitches with my 6800 system and would like to do a proper RAM diag. ?From reading, it seems like CDAT is the most exhaustive.. but I cannot get it to run. ?I can load and then run it.. but it immediately fails at address 8000. ?Since I understand this is used for I/O I am wondering how I would adjust CDAT so it ignores that space and does everything else? ?Any suggestions would be most appreciated. ?I think you can alter the addresses with most and least significant bytes but don't understand quite how. Brad Sent from my Samsung device

9 years, 10 months

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Have Calcomp 565 plotter - looking for pen mechanism

by COURYHOUSE＠aol.com

I have same problem here we have the large size calcomp early plotter that actually has an ibm tag on it! it came to us with a hp 3000 series 3 with a parallel interface board for the 3000... I used to enjoy playing with it. back in the days when museum was in a suite next to computer exchange inc in phx things were really openly displayed and I suspect years ago some early collector stole the pun box having little pens and the solenoid head thing. I used to have a spare solenoid only but do not know where it ended up... the little fitted wood box was cool though! In a message dated 8/19/2016 9:51:37 P.M. US Mountain Standard Time, pete at petelancashire.com writes: Unless you are willing to make you own, they are very, very rare. Two have shown up on Ebay in the past 3 maybe 4 years that I'm aware of. I was lucky I got one that due to its description I was either the only bidder or close to it. The one that sold recently went for a lot more, $500 or more. My suggestion decide what your willing to pay and keep your eyes open, If you in an area that would have been where the plotters would have been used, start asking around. Someones grandfather took one home or something like that and it will be in a garage sale for $1. So put some ad on Craigslist with pretty much nothing other then some good photos, the owner will not have a clue what your talking about. Start asking around, etc etc etc. good luck -pete On Fri, Aug 19, 2016 at 7:13 PM, Jack Rubin <j at ckrubin.us> wrote: > I returned from the recent VCF-West with one more item off my ever-shorter > "must have" list - I am the new owner of a very nice Calcomp 565 drum > plotter. Even better, I was able to find the perfect shipping container for > it at Weird Stuff! > > Photos here - http://tinyurl.com/calcomp565 . > > The only problem, unfortunately a major one, is that it is completely > lacking the pen mechanism. This is actually a multi-part assembly that > threads into the carriage on the front rails of the plotter and lifts the > pen up and down in response to z-axis commands from the controller. It is a > solenoid that uses the pen as the core and was thus supplied in many > configurations depending on the kind of pen used. I'd be happy with any > bits of any configuration if you might have an idea where to find such > items. > > BTW, I'm well aware (and deeply envious!) of the fine work done by Tom > Mikulic who recreated the entire mechanism from scratch - > http://tomislavmikulic.com/proj-565.html . > > Thanks for any help you can provide, > Jack > > >

9 years, 10 months

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Have Calcomp 565 plotter - looking for pen mechanism

by j＠ckrubin.us

I returned from the recent VCF-West with one more item off my ever-shorter "must have" list - I am the new owner of a very nice Calcomp 565 drum plotter. Even better, I was able to find the perfect shipping container for it at Weird Stuff! Photos here - http://tinyurl.com/calcomp565 . The only problem, unfortunately a major one, is that it is completely lacking the pen mechanism. This is actually a multi-part assembly that threads into the carriage on the front rails of the plotter and lifts the pen up and down in response to z-axis commands from the controller. It is a solenoid that uses the pen as the core and was thus supplied in many configurations depending on the kind of pen used. I'd be happy with any bits of any configuration if you might have an idea where to find such items. BTW, I'm well aware (and deeply envious!) of the fine work done by Tom Mikulic who recreated the entire mechanism from scratch - http://tomislavmikulic.com/proj-565.html . Thanks for any help you can provide, Jack

9 years, 10 months

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DEC Indicator Panels page

by jnc＠mercury.lcs.mit.edu

> From: Mike Ross >> It seems to be always near the CPU ... there are only a few >> possibilities: BA15 (paper tape controller), DW15A (bus converter), >> KE15 (extended arithmetic), MM15-A and MK15-A (memory). It might also >> be a BD15 ... since that was listed as having an insert for it. It turns out the KE15 registers are available on the main console, with a setting on the rotary 'select registers to display' switch. > I'm not aware of any memory indicator panels associated with > any pdp-15 configuration I was just being complete/thorough... :-) > Bingo! > BA15 & TC15 (and many other pics) Oooh, thanks ever so much for turning that up!!! So that mystery panel seems to be a general panel, more associated with the but one quadrant is the KT15 memory management, one is the KA15 priority interrupt system, and there's general CPU/system stuff throughout (memory parity, power fail, instruction register). I'm not sure what it's formal name might be (I don't think it can be BA15, given all the CPU stuff that's in it). Very odd that the User's Handbook doesn't cover it when it covers the KT15, the KA15, etc, etc; the print set might be informative (now that I can see what's on that panel). Noel

9 years, 10 months

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Microvax II hardware not recognized

by jnc＠mercury.lcs.mit.edu

> From: Paul Koning > A lot of Unibus/Qbus devices have "floating CSRs" which means they > don't have fixed address assignments. Instead, the correct address is > based on a set of rules, which puts devices in an ordered list and > assigns addresses in sequence. .. If you get the address wrong, the > system will see the device as the wrong type What about if you have a series of devices (A, B, C, D, E), assigned addresses in the correct order, and then you remove C from the system; will the software stop probing for more devices when it gets to C (ie. D and E, although still plugged in, will not be seen)? Noel

9 years, 10 months

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DEC Indicator Panels page

by jnc＠mercury.lcs.mit.edu

> From: Al Kossow > we have one > ... > i'll request access to it to shoot the panel Excellent! That's currently the worst image of all of the ones on the page, so a good one will really count. Thanks! (Although I am a bit curious at to why the Museum's Web site doesn't offer the option of larger images? If so, that would have been all I needed - the existing image is square on from the front, so if larger, that would have been perfect.) I anyone has a TC15, the existing picture of that one is also pretty bad, (hint, hint :-). > there's a cool picture of a PDP-15 here: > http://www.chilton-computing.org.uk/gallery/ral/orig/r12588.jpg Yeah, I think that image (definitely that machine) was discussed in a prior message in this thread. That image shows the RF15 on the left, the VT15 on the right, and that one in the middle is the unidentified mystery one we have a bunch of images of. Noel

9 years, 10 months

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Front Panel update - Catalog

by rodsmallwood52＠btinternet.com

Hi Guys I'd like to catalog my growing list of panels etc. and the data I have on them. Some of course I may never make and others I will. A number of you are connected to museums and would have come across this issue. Perhaps you could advise. Rod (Panelman) Smallwood

9 years, 10 months

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SWTPC GT-6144

by vintagecomputer＠bettercomputing.net

Just posting this here in case it reaches different eyes than the forums. ?I had an epiphany yesterday and realized someone on ebay had a GT-6144 as part of an overpriced auction for a Digital Group system. ?They actually agreed to separate it and I will have it in my hands within a couple of weeks. ?I was wondering how rare these are? ?SWTPC stuff seems to be pretty scarce on ebay generally. I'm wondering if any of you have ever used one of these, esp. in conjunction with a SWTPC system? ?Wondering how much grief I have to get into to hook one up and get it working. ?I know they require their own power supply.. I'm thinking I can use the spare P-97 I have or a spare 6800 PS. ?But I'm leery of modding my original CT1024 heavily. ?Might be time to build up my third one. Getting pretty close to having this 6800 all kitted out.. just need the PR40 and AC30 and we are there I think. :) Sent from my Samsung device

9 years, 10 months

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SWTPC 6800

by vintagecomputer＠bettercomputing.net

I've a question. ?I've now got my CT1024 working properly with my 6800.. is there an easy way to load txt loader files into it while it is still connected to the CT? ?Or do I have to load something in via PC first and then swap cables? Sent from my Samsung device -------- Original message -------- From: Pontus Pihlgren <pontus at Update.UU.SE> Date: 2016-08-11 11:27 PM (GMT-08:00) To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Re: SWTPC 6800 Very interresting read, thank you Ethan. /P On Tue, Aug 09, 2016 at 10:55:54AM -0400, Ethan Dicks wrote: > On Fri, Aug 5, 2016 at 2:58 PM, Chris Elmquist <chrise at pobox.com> wrote: > > On Friday (08/05/2016 at 06:50PM +0000), tony duell wrote: > >> > >> Am I the only person who rarely, if ever, has RS232 problems? > > > > No.? ;-) > > No, but I used to manufacture sync serial hardware and have deep > knowledge of how async serial in general, and RS-232/EIA works in > particular, and still have all the test gear from 30 years ago.? I get > why people find serial comms frustrating and do not take my > experiences as "typical". > > I pretty much don't hook up anything new that isn't on a "traffic > light".? I have several - DE9-DE9 for modern stuff, and multiple > DB25-DB25 for old and new stuff.? *Mostly*, if you plug everything in > and you get at least TxD and RxD to light up, you at least have > figured out where the primary gozintas and gozoutas go and can stop > adding null-modem adapters.? Past that, you have to know if either end > requires hardware handshaking and either plumb the right signals > (vintage setup documentation is invaluable for this) or bridge the > appropriate lines (documentation again) so that one or both sides > _thinks_ there's hardware handshaking.? If you defeat it, you might > run into overrun conditions, but at least you should be able to > establish basic comms and pass a few characters.? To that end, you do > have to match speeds on both sides, and the usual best place to start > is 8-N-1 for data bits, parity, and stop bits.? I've run into multiple > situations where 7-E-1 or 7-N-1 is the right answer.? With enough > experience, the "baud barf" from mismatched speeds takes on an often > recognizable pattern that can be used to quickly figure out what the > speed ought to be, but lacking instrumentation like a serial analyzer > or an oscilloscope, one can try "all the speeds" until cleartext comes > through.? I also try the speeds in "most popular order", 9600, 1200, > 300, 2400, 4800, 19200, 600... in the hopes of saving time.? Every > once in a while, you run into some oddball stuff, like 9600/150, etc., > split speeds from the days of timesharing setups where the CPU wanted > to get data to the users as fast as possible but wanted to minimize > input interrupts and more closely match the input flow to (slow) human > typing speeds.? This wasn't common with microcomputers, but I've seen > it with PDP-11 and PDP-8 setups and isn't something to look for first, > but it does exist and highlights how strange things can get if all > you've ever done is plug a high speed modem into a PC for dial-up > internet. > > One important tip about USB serial dongles (and some laptops DE9 > serial ports) - I've had problems with some of them and 1970s gear > because the EIA/RS-232C (1969) level specification is +5V to +15V for > space (0) and -15V to -5V for mark (1) (with +/-3V min sensitivity) > and a lot of old gear is expecting +/-12V and not happy with > lower-voltage lines and thin wires that don't help signal losses.? One > case in particular was a 1977-era Bridgeport Series II CNC mill with a > LSI-11/03 CPU and a lot of custom Bridgeport boards.? Everyone else > who tried to talk to the Bridgeport before me had zero success.? I > checked all the things on the list and finally pulled out the laptop > and set up a Dell desktop which worked the first time.? When > connecting to pre-1982 gear, I'd definitely try it from a desktop if a > laptop is just not working.? Checking the lines with an oscilloscope > could also help verify this what's giving the grief (I did not have > one handy when we were trying to get that CNC mill working). > > In terms of serial analyzers, there are several types out there, and > the ones that I've had the most time on are the HP 4951/4952 series. > There are different models with different features, but if you are > going to shop for one, ensure it comes with the "keyboard lid" because > that's where the line drivers and serial connectors are.? The large > connector on the back goes to a "pod" that happens to snap on the > front of the unit when the keyboard is flipped up.? It's much easier > to find the base units than loose pods, IME.? Check which pod.? I've > seen many with DB25s, which is probably what you want, but I've also > seen DC-37 connectors, and non-EIA (RS-232) level shifters.? The good > news is that among these different models, the pods should be > interchangable, so if you end up picking up 2 units (not unusual) with > different base capabilities (some have DC-150 cassette tape, some have > 3.5" floppy, plus some minor differences) and only one has a DB25 EIA > pod, you can at least migrate it between the units.? I find the serial > analyzers invaluable for snooping on the details of what's happening > on the wire, but any analyzers I have seen have a handy "autoconfig" > button to sniff traffic and configure the line for monitoring, so it's > often a quick click to get all the parameters if you don't already > know them.? Where they really shine is looking for troubles at the > application layer, debugging Kermit or XMODEM traffic that isn't > working for any obvious reason.? The advanced stuff you can do is to > write programs for some analyzers to simulate a host or a client for > software debugging or to reproduce a problem for deeper analysis - > this is far beyond the usual "why can't I get this terminal working > with this vintage machine" but when you need it, you need it. > > In summary, I start by scoping the line with an LED traffic light > (swapping lines or making custom cables where necessary), then move on > the speed and parity settings (and changing the easier-to-change end), > then look deeper when the easy stuff doesn't work.? Easy problems take > minutes or less.? Hard problems can take a long time to resolve. > > -ethan

9 years, 10 months

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Beaten by VT100 PSU.

by mattislind＠gmail.com

Normally I manage to repair the SMPSU that I dive into. But this time I must admit that I am defeated. It is a VT100 PSU (H7831). I tested it with dummy loads and it worked fine. But when used in the terminal with the Basic Video board and monitor board it gives a jumpy picture. Both horizontally and vertically. First I thought that it was related to the monitor board but soon recognised that the +12 V had a most peculiar waveform on it: http://i.imgur.com/d0z0NQS.jpg http://i.imgur.com/gQqmSN5.jpg http://i.imgur.com/P0dt5y1.jpg This waveform is only present on the +12V, not the +5V, not the -12V or -23V. So I connected just the Basic video board and a variable dummy load instead of the monitor board. I used a Variac on the input. It turned out that there were no problems now with the +12V. Until I pulled out and reinserted the keyboard. Then it was there. If I lowered the input voltage it was impossible to provoke this problem and also if I increased the +12V load. Further testing also gave that putting a few amps extra load on the +5V also made it resistant to this type of failure mode. The amplitude and frequency of this waveform is shifting by +12V loading and AC input voltage. The VT100 SMPSU is a primary switcher regulating the +5V. Then the +12V is handled by a secondary switcher which is synchronised with the primary switcher. The other voltages have linear regulators. It looks to me that something in the regulation circuitry is not behaving, thus oscillating. But what component has failed (or is out of spec)? I checked transistors. I checked the waveform from the 555 chip and ramp voltage input to the 555. But I cannot figure out what the problem is. I checked the 560uF output capacitor but my LCR meter said it was in good shape. Around 700 uF and very low ESR. I was thinking of breaking up the feedback loop and see what happens, using an external +12V as an input to the regulator rather than the generated +12V. But hasn't got there yet. Anyone seen this type of behaviour? Tony, do you have some piece of good advice? /Mattis

9 years, 10 months

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DEC Indicator Panels page

by jnc＠mercury.lcs.mit.edu

> From: Mattis Lind >> To start with, there's this image: >> >> http://homepages.inf.ed.ac.uk/gdmr/Historical/Photos/1980.08-PDP1540.jpg >> >> That's clearly an FP15 on the lower left, and I have identified the >> center one as a TC15, but what are the other two? OK, I have identified the one on the far right as a VT15. (Crappy image from DEC documentation added to the page - can someone provide a better one? I've looked online but the ones I've found are either at a steep angle, or have a corner missing, or something.) (And I'm still hoping for an RK08 or RF11 image! ;-) The other one seems to be the same as this one: > http://www.hal1.se/Rolfs_web/Rolfs_images/1975_1/pages/7503%2003.htm > > The panel to the left is RF15 and the right is TC15. But what is the > middle one? which is in quite a few PDP-15 images, but still un-identified. It seems to be always near the CPU, so perhaps it's a panel for the memory management, or something like that? I've looked through some of the manuals on BitSavers, and I've yet to turn it up, although the block diagram on page 2-3 of the PDP-15 Installation Manual shows an 'indicator [panel]' (no further info on it, alas) in that location, which is probably it. There aren't that many devices in that system, so there are only a few possibilities: BA15 (paper tape controller), DW15A (bus converter), KE15 (extended arithmetic), MM15-A and MK15-A (memory). It might also be a BD15, whatever that might be (seems to include a D/A, from what little I can find on it online), since that was listed as having an insert for it. Noel

9 years, 10 months

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punchcard reader wanted to rent, BC Canada area

by billdegnan＠gmail.com

$$ if you have an IBM 2501 or similar looking punchcard reader and would like to rent it from sept 1-9th. I would expect you'd deliver it and set up so it reads cards, and as a bonus can print cards that "say something on them", understanding that was not how they were originally used. This is for a SCI FI channel show. Contact me vintagecomputer.net/contact.cfm if you can do this. $$ worth the trouble. If it does not work, that's possibly ok, but they want a working reader that at least reads in a stack of cards through the mechanism. Bill

9 years, 10 months

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ITT Cannon SK-19-21C

by mattislind＠gmail.com

I am looking for a ITT Cannon SK-19-21C connector to be able to connect a Calcomp 565 (IBM1627) or a Houston DP-1. Does anyone know of a cheaper source than PEI Genesis? They want 116 euros + 25 euros shipping + VAT. /Mattis

9 years, 10 months

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PDP11GUI 1.48

by j_hoppe＠t-online.de

Hi, a new release of PDP11GUI is online, with lots of enhancements: - new disk driver RK611 for RK06/RK07 - Support for Robotron A6402 PDP-11/23 clone - Support for PDP-11/44 with console firmware v3.40C - after loading of new machine description file, show "Restart?" message. Default is now a PDP-11 with all peripherals build in, not the "minimal" machine. - added 2K chip size and "single word" in memory tester. - If windows font magification > 100 %, memory table form disturbed. - Long running console access now with progress bar and "Abort" button - serial format (8N1, 7E1 etc) selectable. - Migration to GitHub, sources available. Download from https://github.com/j-hoppe/PDP11GUI/releases Enjoy! Joerg

9 years, 10 months

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Looking for SCP board

by rich.cini＠verizon.net

All -- Might be a long shot, but I'm looking for a Seattle Computer SCP-300 8086 Support Board for a project I'm working on. I have the memory and CPU, and a Cromemco floppy card but I'm looking for this to complete the set. If anyone has one that works that they're willing to sell, please let me know. Thanks. Rich Sent from my iPhone

9 years, 10 months

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R: HP to acquire SGI

by jnc＠mercury.lcs.mit.edu

> From: Fred Cisin > Could you get that translated into English, please? Indeed. Think 'PARRY meets Dissociated Press'. Noel

9 years, 10 months

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DEC Indicator Panels page

by jnc＠mercury.lcs.mit.edu

> From: Mike Ross > Here's the FP15 you were looking for... Oooh, thanks; I had that image, wasn't exactly sure what it was. I hadn't done much with the PDP-15 panels, in part because it wasn't my focus (the -11) panels, in part because it seemed like there were a ton of them, in the -15 pictures I had. I have now put a few cycles into them, and have identified the RF11 and TC11 as well, and added them to the page (crummy images from scanned manuals, though). There are still some other -15 panels showing up in pictures, which I have no idea about. To start with, there's this image: http://homepages.inf.ed.ac.uk/gdmr/Historical/Photos/1980.08-PDP1540.jpg That's clearly an FP15 on the lower left, and I have identified the center one as a TC15, but what are the other two? And here's one with two _more_ different panels: http://www.simulogics.com/nostalgia/DEC/15_01.jpg The one on the right does _not_ seem to be a TC15... And then there are: http://www.chilton-computing.org.uk/gallery/ral/orig/r12600y.jpg http://www.chilton-computing.org.uk/gallery/ral/orig/r12588.jpg but those seem to be the same as in the first one. Noel

9 years, 10 months

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Huge Vintage Mac Sale in Denver

by tedahodges＠mac.com

Hi All, The lease is up at the end of the month, and all of my Macintosh stuff has to go! Hundreds of Macs from the 1980s, 1990s, and Early 2000s to choose from! Also have tons of Keyboards, Mice, Monitors, and Peripherals, Expansion Cards, Hard Drives, and everything else. All CPUs $10/each! All Monitors $10/each! All Keyboards and Mice $5/each! Hard Drives, CD Drives, Floppy Drives, Expansion Cards, ect. $5/each! I must liquidate this collection (which is probably one of the biggest in the country), or it goes to the recycler! Everything is sold AS IS WHERE IS, I will not ship any of this! CASH ONLY Contact me if you're interested in coming down! Sale will be from 10:00 AM - 2:00 PM on Saturday 8/20, and from 12:00 PM until 6:00 PM on Sunday 8/21! You can see pictures of most of it on my Craigslist ad http://denver.craigslist.org/sys/5732303316.html Thanks for the interest! -Ted Sent from my iPhone

9 years, 10 months

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can anyone identify this terminal keyboard and pcb?

by vintagecomputer＠bettercomputing.net

Neat. ?Any thoughts as to model year? ?Are these ASCII? Sent from my Samsung device -------- Original message -------- From: Al Kossow <aek at bitsavers.org> Date: 2016-08-16 5:42 PM (GMT-08:00) To: cctalk at classiccmp.org Subject: Re: can anyone identify this terminal keyboard and pcb? On 8/15/16 9:52 AM, Brad H wrote: > I've tried nailing down what terminal it came from looking at hundreds of pictures but no dice. More research today. I'm pretty sure it was a Telex message preparation terminal. They did have a 202 datacomm service. Still no clue who might have made it. He did have more than one keyboard, so I did buy one. After staring at the code in the eproms there is a setup mode (probably shift/A) which looks like it lets you set a clock. Another clue is the cent symbol above the 6

9 years, 10 months

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Canon VP-1000

by lproven＠gmail.com

This recently came up on the FB vintage computing group. http://www.thepcmuseum.net/details.php?RECORD_KEY%28museum%29=id&id%28museu… Allegedly it's a successor to the Canon Cat and preserved some elements of it, but Google can find little about it. Others are looking too... http://www.vcfed.org/forum/showthread.php?47761-Anybody-have-info-about-the… -- 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, 10 months

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Front Panel Update - PDP-8/i

by rodsmallwood52＠btinternet.com

Hi Guys PDP-8/i panels are now shipping. If you are quick with your order we can ship to-morrow Rod (Panelman) Smallwood

9 years, 10 months

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DEC PDP bits and Programma 101 available

by vier321＠hotmail.com

Dear reader, For a serious enthusiast or museum I have available: * Olivetti Programma 101 calculator * DEC GT40 grapic display terminal * DEC VT05, first DEC terminal * DEC PC04 paper tape reader/punch for PDP-8 * DEC TU60 DECassette dual tape drive with two tapes mounted * DEC VR14 vector monitor; can be used directly with the VT11 below * VT11 display processor backplane + boards + LK40 keyboard + original 375 light pen. Everything to turn any UNIBUS machine into a "GT40" Moonlander capable system. * 21" BA11 box used to mount an 11/40 or 11/45 for example * Lots of smaller DEC parts like filler panels; please ask Located in the Netherlands; local pickup much preferred. Would consider a trade for pre-1975 DEC bits or a simple cash deal. Thanks, Erik

9 years, 10 months

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can anyone identify this terminal keyboard and pcb?

by aek＠bitsavers.org

http://www.ebay.com/itm/172299367709 (kb) http://www.ebay.com/itm/172290512799 (pcb) I think it may be a Courier. I bought the pcb, which has "C8080" on the sn label so I'm guessing it's Courier. Quite unusual with build-in modem. Will be dumping the eproms soon, hopefully some text strings in there. The seller ripped the terminals apart years ago for the 8080s and didn't rember the make/model, only that the case was two-tone. He got a pretty penny for the crappy probably dead Keytronic foil/foam keyboard ($80) Weird thing is it looks like a Lear-Sieger pcb design, with the Molex power connectors and the color/font of the markings on the silk-screen.

9 years, 10 months

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5150/5151 Video Card??

by wheagy＠gmail.com

Does anyone have any info on this video card? I wasn't able to find much. https://imgur.com/a/TjIzL The card came in a 5150, but whatever monitor they were using did not come with the 5150. I'd like to see if it's possible to use this card with a 5151. Thanks, Win

9 years, 10 months

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still looking for that stuff?

by cctalk-bounces＠classiccmp.org

Hey friend, Are you still lookinf for that stuff? I think I've just seen someething you may like, look <http://effect.strtgk.com/aegrtgm> Very truly yours, cctalk-bounces at classiccmp.org

9 years, 10 months

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