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

by w9gb＠icloud.com

??Many of the classic Rocker & Lever Actuator switches from the 1960s & 1970s were discontinued, due to industry consolidation (M&A) in 1990s and the convert or obsolete decisions (RoHS compliance), a decade later. This likely means you will need to ?adopt? to current offerings == OR == plow through remaining discontinued surplus parts. For example, Mendelsons only lists about 5% of their Dayton warehouse inventory. https://meci.com/electronics/parts/switches/rocker.html == These Large Actuators are sometimes referred to as Wide Paddles. C&K refers to this PC board mounting as the V3 Style, VERTICAL MOUNT, V-BRACKET It is still offered for the C&K ?T-series? Subminiature Toggle Switches. https://www.mouser.com/datasheet/2/60/ttoggle-1324393.pdf C&K Selector Guide (current production models) http://www1.futureelectronics.com/doc/C%20-%20K%20COMPONENTS/D102J12S115DQA… NKK (Japan) refers to this mounting style as Bracket & Reinforced Bracket for their ?M-series? Miniature Rocker Switches. You purchase the Actuators separately, for the pivot ? like your example. https://www.mouser.com/datasheet/2/295/MrockersSnapin-29723.pdf gb === From: "Charles" <xxxx at centurytel.net> To: "cctalk digest" <cctalk at classiccmp.org> Subject: Looking for front panel switch At some earlier time, I'd either lost (or cannibalized for a PDP-8) one of the switches. Subminiature SPDT toggle switches are readily available >from C&K and Mountain, but I cannot find one with the four-pin mounting bracket and the "ears" to hold the paddle lever pivots. Attached is a picture showing part of the front panel. https://imgur.com/bIrmZt7 Does anyone have a matching switch they're not using? I have a spare black lever, but it's supposed to be blue for that nibble which would be even better ;) Thanks for any help. ==

7 years

1
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Looking for front panel switch

by charlesmorris800＠centurytel.net

> https://www.tedss.com/MT-SPDT-7101 Thanks :) It's only slightly different (the mounting pins look to be a bit closer together than my switches dated 1975, but I can drill a couple holes in the PC board, and swap my matching lever onto it.) Certainly a lot closer than the totally non-matching chrome bat handle unit I stuck in there for now! -Charles -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

7 years

1
0
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Vintage Computer Warehouse Liquidation

by tsraguso＠gmail.com

This is my first of many posts that I will make about this sale. I am liquidating a large warehouse filled with vintage computers including Apple, DEC, IBM, Commodore, Tandy/Radio Shack, HP, and more. Many items are currently inaccessible due to large piles of junk and video games. So far, I have found: Apple Lisa 2 Tandy 6000 HD IBM 5251 Keyboard MicroVAX 3900 (currently inaccessible) MicroVAX II (currently inaccessible) Cromemco System One Ohio Scientific Challenger 2p Lots of Apple II series IBM 5110 Piles of VT100s Even more VT220, VT320 Northstar Advantage Osborne 1 Various Kaypros PC clones Commodore B-Series Just about every kind of TRS-80 IBM XT with monitor in box NeXT cube Almost every type of Macintosh Amigas IBM PS/2 P70 HP 3000 (inaccessible) 1970s HP computers Boxes filled with Cromemco and Northstar manuals A pallet of 1980s PC clones (inaccessible) Heaps of CRT monitors Mechanical Keyboards At least 20 Apple Extended Keyboard II's I have barely scratched the surface of the warehouse, and will keep you updated when I find more items, or am able to move the large systems. The DEC terminals are not yet for sale, since I have not yet found the keyboards. I am not taking offers on the entire warehouse at this time. Please feel free to text me with questions Thomas Raguso (832) 374-2803

7 years

12
16
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Mystery chip SCM44506L

by wrm＠dW.co.za

Hi all From a friend's estate I have a Motorola 24-pin 0.6" purple ceramic DIP. SCM44506L 7610 B Any idea what this can be? W

7 years

2
1
0 0

Able document at VCF Midwest

by jnc＠mercury.lcs.mit.edu

> From: Christian Corti >> we only have those for the UNIVERTER and QNIVERTER > And what about the stuff on bitsavers? That's where I got my copies of the UNIVERTER and QNIVERTER docs. I guess I missed grabbing a few; and I see a few more have been added since I last looked: http://www.bitsavers.org/pdf/able/ So we also have the Quadrasync, DH/DM, MICROVERTER and UNIMAP. There are still quite a few missing, though... Noel

7 years

1
0
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Looking for front panel switch

by charlesmorris800＠centurytel.net

This fall I decided to restore my first homebrewed computer that I made 40(!) years ago and still have... a 2 MHz 8080A, 1K of static RAM, a 1702A (256 byte) EPROM, cobbled up an S-100 connector for a VB-1B video card, an 8-bit I/O port that used an EBCDIC keyboard (ASCII translation table in the EPROM), and of course a hand-made front panel PC board with blinkenlights & switches. I had a good time learning assembly language (and hand-assembling)... I also toggled in WADUZITDO once or twice. That's a functional interpreted language in 256 bytes plus char in/out routine, for the youngsters ;) I sold the VB-1B years ago, and can't find the keyboard which got lost in a move years ago. So if I want to play with small 8080 programs, I'll need to add a UART (and redo the primitive monitor program for serial I/O instead of memory-mapped display). Recently I bought one of Martin Eberhard's ME-1702A boards with pre-programmed PIC, acquired all the parts from junkbox and Mouser, and just got THAT working. Surprisingly enough, the monitor seems to still have all the right bits after 40 years. Anyway. At some earlier time, I'd either lost (or cannibalized for a PDP-8) one of the switches. Subminiature SPDT toggle switches are readily available >from C&K and Mountain, but I cannot find one with the four-pin mounting bracket and the "ears" to hold the paddle lever pivots. Attached is a picture showing part of the front panel. https://imgur.com/bIrmZt7 Does anyone have a matching switch they're not using? I have a spare black lever, but it's supposed to be blue for that nibble which would be even better ;) Thanks for any help. -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

7 years

3
2
0 0

LISP implementations on small machines

by jnc＠mercury.lcs.mit.edu

> From: Eric Smith > Code can be executed from the MMU PAR registers on processors with > 22-bit addressing (11/23, 11/24, 11/44, 11/70, and J-11 based systems). My QBUS machine is apart at the moment, so I can't verify this before posting, but I don't think this hack works on the J-11 machines; I documented this behaviour here: http://gunkies.org/wiki/KDJ11_CPUs#Code_in_PARs It does work with F-11 processors (/23, etc). Not sure about model A F-11's, which only have 18-bit QBUS addressing. Noel

7 years

2
1
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[OT] Looking for a CHEAP Metcal WS1 workstand

by alexandre.tabajara＠gmail.com

Subject says all =) ---8<---Corte aqui---8<--- http://www.tabajara-labs.blogspot.com http://www.tabalabs.com.br ---8<---Corte aqui---8<---

7 years

1
0
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Off topic- precision tooling

by useddec＠gmail.com

I have a sizable quantity or tooling for sale or trade including : circular blades, mostly Levin, 1 1/4 d, 1/4 arbor from .008 to 03 and probably others. drill bits- Levin. 13mm, .0028" etc.and 15 tubes only some labeled, B & D, Cleveland decimal sets, Precision twist and other companies sizes 60 through over 100 or so.. Morris taps and dies, 0-80 through 0000-160, about 20 sizes. Most are new, but a few might be used. If you have any interest, contact me off list. If there enough interest I'll try to make a detailed list. They are a pain for me to work with, but cheap to ship. I also have larger size taps, die , and bits up to 1 1/2 or so, I think a #3 or #4 Morse taper Thanks, Paul

7 years

1
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LISP implementations on small machines

by mark.kahrs＠gmail.com

The first implementation was done for the 7090 by McCarthy (hence CAR and CDR --- Contents of Address Register and Contents of Decrement Register). If you want to see a tiny implementation then look for the PDP-1 implementation done by L Peter Deutsch. There's a book chapter and then I found this report: http://s3data.computerhistory.org/pdp-1/DEC.pdp_1.1964.102650371.pdf

7 years

9
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SGI Challenge M memory boards

by dennis.grevenstein＠gmail.com

Hi, Jon wrote: > I have 15 pieces of memory SIMMs for the Challenge M series > (funny, seems like there should be an even #). Pics here : > > http://pico-systems.com/images/SGIChallenge.JPG A Challenge M is basically a server variant of an Indigo2. What you have looks like memory for a Challenge L or Onyx. Dennis

7 years

4
5
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Fwd: VAX + Spectre

by paulkoning＠comcast.net

"Spectre" is one of two notorious bugs of modern CPUs involving speculative execution. I rather doubt that VAX is affected by this but I suspect others here have a lot more knowledge. paul > Begin forwarded message: > > From: coypu at sdf.org > Subject: VAX + Spectre > Date: September 17, 2019 at 5:32:42 AM EDT > To: port-vax at netbsd.org > > So, this is a bug report: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86811 > > GCC would like to know if VAX needs Spectre-related work. > Are any of the VAXes ever made capable of speculative execution? the > first tech for doing it was in 1967, so not entirely far-fetched.

7 years

21
33
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Computer Automation Naked Mini circuit boards

by pontus＠Update.UU.SE

I have a Naked Mini, where are you located? I couldn't see your images.. not sure if my vcfed account is still good. So I don't know what you have. /P On Wed, Oct 02, 2019 at 09:31:09AM +0000, Roland via cctech wrote: > Hello, > I was wondering if anyone has a Computer Automation Naked Mini. > I have these boards and I have no clue what to do with it. So if anyoneis interested please let me know. Pictures are in this vcfed topic: > http://www.vcfed.org/forum/showthread.php?68302-Computer-Automation-Naked-M… interested in swap with omnibus material... > > Regards, Roland

7 years

2
1
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Computer Automation Naked Mini circuit boards

by useddec＠gmail.com

I have two Naked Minis, possible unused, That I would love to find a home for. On Wed, Oct 2, 2019 at 4:31 AM Roland via cctech <cctech at classiccmp.org> wrote: > Hello, > I was wondering if anyone has a Computer Automation Naked Mini. > I have these boards and I have no clue what to do with it. So if anyoneis > interested please let me know. Pictures are in this vcfed topic: > > http://www.vcfed.org/forum/showthread.php?68302-Computer-Automation-Naked-M… > interested in swap with omnibus material... > > Regards, Roland >

7 years

1
0
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Raymond Check discusses MS DOS Floppy Disk Cache

by cliendo＠gmail.com

How did MS-DOS decide that two seconds was the amount of time to keep the floppy disk cache valid? https://devblogs.microsoft.com/oldnewthing/20190924-00/?p=102915

7 years

5
12
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LISP implementations on small machines

by harper＠secureoutcomes-hq.com

Correction!? IBM 704!Jack-----------------------------------------------------Jack HarperSecure Outcomes Inc2942 Evergreen ParkwaySuite 300Evergreen, Colorado 80439303.670.8375 Officewww.secureoutcomesinc.com for Product Info. -------- Original message --------From: Jack Harper <harper at secureoutcomes-hq.com> Date: 10/2/19 13:36 (GMT-07:00) To: Lars Brinkhoff <lars at nocrew.org>, "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>, Bill Degnan via cctech <cctech at classiccmp.org> Cc: Bill Degnan <billdegnan at gmail.com> Subject: Re: LISP implementations on small machines Hello List -That jives with a conversation I had with John McCarthy before he died.He said that he and friends began the LISP 1.5 (really 1.0) implementation on the IBM 709 - and we both agreed that the idea of LISP running in an enormous pile of vacuum tubes was and is amazing:)Jack-----------------------------------------------------Jack HarperSecure Outcomes Inc2942 Evergreen ParkwaySuite 300Evergreen, Colorado 80439303.670.8375 Officewww.secureoutcomesinc.com for Product Info.-------- Original message --------From: Lars Brinkhoff via cctalk <cctalk at classiccmp.org> Date: 10/2/19 07:42 (GMT-07:00) To: Bill Degnan via cctech <cctech at classiccmp.org> Cc: Bill Degnan <billdegnan at gmail.com> Subject: Re: LISP implementations on small machines Bill Degnan wrote:> First full version 7090 and then a version was ported tot he PDP-1> that was less powerful.? This is straight from the LISP manual on> site.Which LISP manual is that?The LISP I Programmer's Manual from 1960 says IBM 704.? It also says "aversion of LISP I is being prepared for the IBM 709".http://bitsavers.org/pdf/mit/rle_lisp/LISP_I_Programmers_Manual_Mar60.pdf

7 years

1
0
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LISP implementations on small machines

by harper＠secureoutcomes-hq.com

Correction!? IBM 704!Jack-----------------------------------------------------Jack HarperSecure Outcomes Inc2942 Evergreen ParkwaySuite 300Evergreen, Colorado 80439303.670.8375 Officewww.secureoutcomesinc.com for Product Info. -------- Original message --------From: Jack Harper <harper at secureoutcomes-hq.com> Date: 10/2/19 13:36 (GMT-07:00) To: Lars Brinkhoff <lars at nocrew.org>, "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>, Bill Degnan via cctech <cctech at classiccmp.org> Cc: Bill Degnan <billdegnan at gmail.com> Subject: Re: LISP implementations on small machines Hello List -That jives with a conversation I had with John McCarthy before he died.He said that he and friends began the LISP 1.5 (really 1.0) implementation on the IBM 709 - and we both agreed that the idea of LISP running in an enormous pile of vacuum tubes was and is amazing:)Jack-----------------------------------------------------Jack HarperSecure Outcomes Inc2942 Evergreen ParkwaySuite 300Evergreen, Colorado 80439303.670.8375 Officewww.secureoutcomesinc.com for Product Info.-------- Original message --------From: Lars Brinkhoff via cctalk <cctalk at classiccmp.org> Date: 10/2/19 07:42 (GMT-07:00) To: Bill Degnan via cctech <cctech at classiccmp.org> Cc: Bill Degnan <billdegnan at gmail.com> Subject: Re: LISP implementations on small machines Bill Degnan wrote:> First full version 7090 and then a version was ported tot he PDP-1> that was less powerful.? This is straight from the LISP manual on> site.Which LISP manual is that?The LISP I Programmer's Manual from 1960 says IBM 704.? It also says "aversion of LISP I is being prepared for the IBM 709".http://bitsavers.org/pdf/mit/rle_lisp/LISP_I_Programmers_Manual_Mar60.pdf

7 years

1
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HP vintage boards being sold as scrap

by sales＠elecplus.com

https://www.ebay.com/itm/174036836066 Cindy Croxton Electronics Plus 1613 Water Street Kerrville, TX 78028 830-370-3239 cell sales at elecplus.com --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

7 years

14
26
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Need DM11 documentation

by jnc＠mercury.lcs.mit.edu

Hi, does anyone out there have any DM11 documentation? The only thing I could find online is the "DM11-BB model control option manual" (DEC-11-HDMBA-A-D) - and it's the impetus for this request, actually. One page 1-5, pg. 15 of the PDF, it has a diagram of which boards go into which slots on the DM11 backplane - and ir has _two_ boards marked M7245! So something's clearly wrong. The DM11 is a fascinating oddball of an interface, BTW. (It's in the 1972 edition of the "peripherals and interfacing handbook".) A lot of its internal state is kept in main memory, and accessed via DMA! This includes the incoming data shift registers!!! So it can really chew up a bus - probably why it was dropped ASAP. I guess when it was done, memory in chips must have been expensive and/or not very dense; and it must have been before the first UART chips. Noel

7 years

2
1
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VCF Midwest 14 Videos

by silent700＠gmail.com

The videos are up! The last of the VCF Midwest 14 Talks videos, shot in glorious 4K and lovingly edited by the intrepid Trixter, have been rendered and posted to our YouTube channel: http://youtube.com/vcfmidwest Check out the Talks you missed this year and in years past, as well as select attendees' videos that we've linked from our page. If you'd like, click the Subscribe button on our profile to let us know you want to see more. Thanks to all those who presented at VCFMW this year and to all that shot video when we were too busy to document our own show. For some of us, it's the only way we see it. 'Til next year... -j

7 years

1
0
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Course materials for MIT 6.031 (c. 1974) scanned

by derschjo＠gmail.com

Thought someone here might find this interesting; I have a binder of materials describing the entire course (descriptions of the PDP-11/45 DELPHI system, readings, coursework, quizzes, exams (with answers)) for MIT 6.031 "Structure and Interpretation of Computer Languages", 1974. http://yahozna.dyndns.org/scratch/scans/mit/MIT%206.031%20Structure%20And%2… It starts with PDP-11 assembly language, moves on to Algol and LISP and is over a thousand pages of material. Get studying! - Josh

7 years

6
9
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Looking for S100 SCP-500C, Disk Master, Seattle Computer Products

by ethan＠757.org

Looking for a SCP-500C Disk Controller to go with my CPU Support and 8086 boards.

7 years

1
0
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phone systems, old and less-old

by jwest＠classiccmp.org

I know some peeps here are phone pholks?..See www.ezwind.net/phonestuff <http://www.ezwind.net/phonestuff> One is an old ?bell system western electric?. It seems to have a few 66 blocks just under the cover, a power supply, and some kind of modules that plug in. The other is a Nortel Networks ICS. It feels way too light, not sure if anything is in it. There is another piece of Nortel gear on the wall, seems to be some kind of wireless? thingy called Nortel Networks Call Pilot 100. I know zilch about phone systems, and don?t want to know anything about phone systems ? They were on the wall of a warehouse telco closet that my client just rented and we need the space on the dmarc wall for a rack. If someone wants them, and is willing to pay ship/pack (ups) from 63146 let me know within 2 days or they go to the skip. J

7 years

15
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Course materials for MIT 6.031 (c. 1974) scanned

by jnc＠mercury.lcs.mit.edu

> From: Josh Dersch > Any idea what ultimately happened to that 11/45? MIT offered it to me as a gift, but I was a total idiot (and also didn't have future vision), and as I was so busy with the IETF/IESG at the time (which might have been the right call, given how the Internet - note the correct capitalization - has changed the world) I didn't have time to arrange the shipping, and it was given to FTP Software. I recently tried to track it down, to find all the software on it (before I discovered a couple of sets of dump tapes I had made BITD in my basement), and they gave it to one of their employees and it was apparently scrapped. > Are the Algol and LISP available anywhere? Not up yet, but if anyone wants either, I can try and find time to get them up. For the Algol interpreter, all I have is the binary (runs under the MIT-hacked PWB1 - not sure if it would run until vanilla V6) and the manual; the source was unfortunately not saved when the drives were moved from DSSR/RTS (the DELPHI group) to my group, CSR. (Although there may at one point have been a copy retained on a now long-lost pack, along with a lot of other 6.031 stuff, like problem sets sources; I do have a file which is a listing of the disk contents.) For the LISP interpreter, we do have the source (in MACRO) too. Alas, to build it, one needs the 'bind' binder (which groks .REL files, which are based on DEC's relocatable binary format), which was i) written in BCPL, and ii) the current binary can't rebuild itself (I forget the details, whether it's the BCPL compiler, the MACRO assembler, or 'bind' which can't be re-built; it was a couple of years back I was playing with all that). Luckily, we do have some older binaries which can probably be used to work around the issue. Of course, if one just wants to use the existing interpreter binary, one can avoid all that. Noel

7 years

1
0
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HP vintage boards being sold as scrap - WON

by guykd＠optusnet.com.au

Yesterday: >These will go up on my site at http://everist.org/pics/pcbs Then promptly the web hosting server goes down, since this morning of 20190930 Tue in Australia. I don't yet know why, or have any estimate of when it will come back up. Guy

7 years

1
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Course materials for MIT 6.031 (c. 1974) scanned

by jnc＠mercury.lcs.mit.edu

> From: Josh Dersch > descriptions of the PDP-11/45 DELPHI system > ... > moves on to Algol and LISP I later became the 'owner' of that PDP-11/45 (our group at LCS traded an -11/40, which EECS wanted for their DECSystem-20, for it). That Algol and LISP were later moved to Unix V6 when the group that had done DELPHI converted to Unix. I have both - alas, the source for the Algol has been lost. :-( Noel

7 years

2
1
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IBM 5110 transformer?

by mattislind＠gmail.com

A friend of mine is trying to repair a IBM 5110. He is convinced that the transformer is bad. Anyone knows the spec of the transformer? Someone that has a spare? Looking into the tech documentation tell me that the machine requires +/- 5V and +/- 12 V and also +8.5V A very rough guesstimate based on the number of wires from the PSU to the backplane would give 20A 5V, 4A +12V, 4A +8.5V, 1A -5V and 1A -12V. Anyone with a better guess? /Mattis

7 years

3
4
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HP3000/917LX available in Vacaville

by sieler＠allegro.com

Lee writes: > This is a *very* nice entry-level HP3000/MPE system based on PA-RISC > architecture. But one note - the 917 had the soldered TOD battery on the > motherboard, vs. the FRU TOD battery in the later 918. Not a reason to skip > if you are interested in this machine. True, there's been some discussion of that over on HP3000-L. IIRC, it's still possible to boot even if the battery is dead ... boot to the ISL> prompt, run clkutil, set the date, then exit to ISL>, then run 'START'. Stan

7 years

4
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fix? Repair? or leave alone? http://rcade.camden.rutgers.edu/2020symposium.html

by couryhouse＠aol.com

http://rcade.camden.rutgers.edu/2020symposium.html

7 years

8
8
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Data General AViiON AV300D docs?

by cmhanson＠eschatologist.net

Does anyone have AViiON AV300D or related docs? I got a pair that have bum power supplies and I?m hoping to find something that will makes servicing them easier. After I get them running, I?ll obviously be looking for software. And a pinout for their unique SCSI port, though I hear they can netboot; any details about that would be useful too. ? Chris Sent from my iPhone

7 years

2
6
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FTGH: Pioneer DRM-602X 6-CD changer

by frederic.hugelin＠icloud.com

Hello, I have read your message about pioneer drm-604. I bought one on eBay but the sender didn?t t take out the caddy for shipping and I can t take it out from the player. I would like to know if you could share the service manual or if you have a tuto to diy. Thank you in advance for your help. Regards Fr?d?ric

7 years

3
2
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VCF Midwest 14 Wrap-Up

by silent700＠gmail.com

Hello all - VCFMW14 has come and gone and we're left with lots of photo galleries, a few videos and hopefully fond memories for all. It was a new venue this year and an unprecedented (and unexpected - seriously we filled the place) turnout. Wheels are in motion toward doing it again next year but for now we're just going to rest a little first. Here's a link to all of the known-thus-far pics and vids: http://vcfmw.org/past.html The videos of the actual VCFMW Talks are being scrupulously compiled and encoded and another announcement will go out soon when they're ready. For now, check out the cool setup time-lapse and visitor review videos at the link above. It's looking like we're going to do a reprint run of this year's official shirt because so many were unable to purchase one at the show (see the bit above about unexpected turnout). Maybe you'd like one, too. There's a size survey form in our latest mailing list message here: https://us18.admin.mailchimp.com/campaigns/show?id=389367 And finally a big THANK YOU to all who donated, displayed, volunteered and attended in order to make VCF Midwest the most enjoyable and exhausting weekend of the year for us. -j

7 years

1
0
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Fwd: [TUHS] Recovered!!! The Georgia Tech Software Tools Subystem for Prime Computers

by aek＠bitsavers.org

Have been on the road, and I just noticed this announcement on the TUHS list. I'd been trying to find this for a long time -------- Forwarded Message -------- Subject: [TUHS] Recovered!!! The Georgia Tech Software Tools Subystem for Prime Computers Date: Tue, 24 Sep 2019 22:45:29 +0300 From: Arnold Robbins <arnold at skeeve.com> To: tuhs at tuhs.org Hello All. Believed lost in the mists of time for over 30 years, the Georgia Tech Software Tools Subsystem for Prime Computers, along with the Georgia Tech C Compiler for Prime Computers, have been recovered! The source code and documentation (and binary files) are available in a Github repo: https://github.com/arnoldrobbins/gt-swt. The README.md there provides some brief history and credits with respect to the recovery, and w.r.t. the subsystem and C compilers themselves. Credit to Scott Lee for making and keeping the tapes and driving the recovery process, and to Dennis Boone and yours truly for contributing financially. I set up the repo. For anyone who used and/or contributed to this software, we hope you'll enjoy this trip down memory lane. Feel free to forward this note to interested parties. Enjoy, Arnold Robbins (On behalf of the swt recovery team. :-)

7 years

2
1
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HP3000/917LX available in Vacaville

by sieler＠allegro.com

Hi, A friend tells me that there is a Hewlett-Packard HP3000/917LX available in Vacaville (no word as to price, but I suspect it's free ... the owner wants it to go to a good home). Reportedly running, with additional "mini-tower" (PC size or less) of external disks, a DTC (Distributed Terminal Controller, lets you have up to 32 RS232 terminals attached (depending upon model of DTC)), and an external tape drive (probably DDS, but I don't know for sure). If interested, email me at sieler at allegro.com and I'll put you in touch with the friend of the Vacaville guy. thanks, Stan

7 years

2
1
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Update: Received my 50lb Datapoint 2200 computer from Austria via regular post.

by tosteve＠yahoo.com

Found a Datapoint 2200 in Austria that I wanted - I asked seller Viktor to pack it well, by wrapping it several times in big-bubble bubbewrap, until it was just a giant cube of bubble wrap. See pics here: http://oldcomputers.net/box/ ? The cover was actually sent separately in another box so it didn't crushed by the 50 pound system. First, I have to rewire it from 220vac to 110vac. Second - what to do about that screen?

7 years

7
7
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FTGH VME Microsystems VMEbus DMA interface card manual

by steven＠malikoff.com

VME Systems VMEbus DMA Interface card manual. 1991 reprint from 1986. About 100+ pages, schematic, asm test routines http://web.aanet.com.au/~malikoff/blah/ I didn't see it on bitsavers. I don't have any VMEbus gear so no point it taking up space here. Yours for postage from Brisbane, Oz. Steve.

7 years

1
0
0 0

Houston "clearance"

by sales＠elecplus.com

https://www.ebay.com/sch/m.html?_ssn=jonnyadler <https://www.ebay.com/sch/m.html?_ssn=jonnyadler&LH_PrefLoc=&_from=R40&_trks id=p2499338.m570.l1313.TR12.TRC2.A0.H0.Xkeyboard.TRS0&_nkw=keyboard&_sacat=0 > &LH_PrefLoc=&_from=R40&_trksid=p2499338.m570.l1313.TR12.TRC2.A0.H0.Xkeyboard .TRS0&_nkw=keyboard&_sacat=0 These are the kinds of prices you can expect from the guy in Houston. It was posted earlier as a warehouse clearance. Cindy Croxton Electronics Plus --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

7 years

1
0
0 0

WTB Metcal workstand

by marvin＠west.net

A friend of mine, Harold Fue, has been selling new and used soldering equipment for many years, and may well have what you are looking for. My knowledge of Metcal is limited, but I bought a number of new tips, a used SP-200 unit with handpiece and the handpiece holder from him a couple years ago. A search on google for "harold fue santa barbara" came up with his contact information. He has been selling at Dayton Hamvention for who knows how many years, but an auto accident a year or so ago totaled his vehicle and slowed him up (he is in his mid 80's) >from doing that. Marvin > >> On Sep 25, 2019, at 6:58 PM, Alexandre Souza via cctalk <cctalk at classiccmp.org> wrote: >> >> Dear sirs >> >> I'm looking for a metcal MX500 (so you know what handpiece I have) workstand. Also, cheap tips and a new handle, mine is broken and fixed up man times >> >> I don't know if this request is apropriate on this list, but who knows? =) >> >> Thanks >> Alexandre >> >> PS: I know there are some on epay? > > > Is there a good source for cheap Metcal tips? I got mine through this list about 20 years ago, and IIRC, I still need tips. > > Zane

7 years

1
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HP vintage boards being sold as scrap

by sales＠elecplus.com

He is in RI, and I am in TX. Your shipper is in Calif. You might consider contacting one of the computer museums in Rhode Island to see if they will assist you. http://www.ricomputermuseum.org/ https://www.rcsri.org/ Cindy -----Original Message----- From: Guy Dunphy [mailto:guykd at optusnet.com.au] Sent: Wednesday, September 25, 2019 10:39 PM To: Electronics Plus Subject: RE: HP vintage boards being sold as scrap At 04:46 PM 25/09/2019 -0500, you wrote: >If enough people want them, and someone gets a winning bid, then they can >come to me and I will repackage and ship them for the actual cost of >postage. > >Cindy Thanks for the kind offer. Where are you, relative to the seller? I can see a problem though. Isn't it impossible to have ebay-won items shipped to other than one's ebay-verified address? I'm not sure... I know to get things sent to my reshipper, I have to have them set as my 'real address' before bidding. That's why I asked if anyone is close enough to pick up the boards. Not to mention sidestepping the seller's problematical packing intentions. Guy >-----Original Message----- >From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Guy Dunphy >via cctalk >Sent: Wednesday, September 25, 2019 4:01 PM >To: Brent Hilpert; General Discussion: On-Topic and Off-Topic Posts >Subject: Re: HP vintage boards being sold as scrap > >At 12:00 PM 25/09/2019 -0700, you wrote: >>On 2019-Sep-25, at 3:07 AM, Guy Dunphy via cctalk wrote: >> >>> Does anyone else recognise some of the other boards? >> >> >>There is a stack of IO interface boards, including HSTs, for the HP >2100/1000 series there. >> >>Lower-right stack in this pic, 7 boards, boards have one red and one grey >handle: >> https://i.ebayimg.com/images/g/n08AAOSwjY5dg5Kd/s-l1600.jpg >> >>"HS Terminal" is discernible on one of them, and the one on top looks to be >an HS Terminal as well. >>Can't be certain about the others but they have the same size IO connector, >they may all be HSTs. >> >>HSTs are the basic RS232 & current loop, async serial-line interface >boards, 12531D, used for the console and such in the 2100/1000 series, >>going back to the early machines of the series. >> >>(HS is 'High-Speed', but that's relative to the late-60s, billed for up to >2400bps, but it is possible to operate them at higher speeds). >> >>I'd buy one for, say 60$, if someone picks up the bunch and wants to flog >one. > > > >Sigh. And here I am putting together a rack with a HP 1000 system. >Though, some of those edge connectors look corroded. > >I really would like those DtoA boards. So many! I have both a 3497A and the >3498A extender >plus a need for lots of cards for them. Plus I have the service manual with >schematics >so can repair them. > >Anyway... the seller is listed as being in Warren, Rhode Island, United >States. >I'm in Australia, and have a reshipper in the US. BUT, the reshipper is on >the west coast. > >Is there anyone on this list who lives in that area who could pick them up, >then pack and post >small sets of boards? I can afford to bid (fingers crossed), but _can't_ >afford the postage >of "90 lbs" across the continent. Let alone to Australia. > >The one existing bid, is that anyone here? > >Guy > > >--- >This email has been checked for viruses by Avast antivirus software. >https://www.avast.com/antivirus > >

7 years

1
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WTB Metcal workstand

by alexandre.tabajara＠gmail.com

Dear sirs I'm looking for a metcal MX500 (so you know what handpiece I have) workstand. Also, cheap tips and a new handle, mine is broken and fixed up man times I don't know if this request is apropriate on this list, but who knows? =) Thanks Alexandre PS: I know there are some on epay... -- ---8<---Corte Aqui---8<--- https://www.tabalabs.com.br https://tabajara-labs.blogspot.com

7 years

3
2
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HP vintage boards being sold as scrap

by guykd＠optusnet.com.au

At 04:46 PM 25/09/2019 -0500, you wrote: >If enough people want them, and someone gets a winning bid, then they can >come to me and I will repackage and ship them for the actual cost of >postage. > >Cindy Thanks for the kind offer. Where are you, relative to the seller? I can see a problem though. Isn't it impossible to have ebay-won items shipped to other than one's ebay-verified address? I'm not sure... I know to get things sent to my reshipper, I have to have them set as my 'real address' before bidding. That's why I asked if anyone is close enough to pick up the boards. Not to mention sidestepping the seller's problematical packing intentions. Guy >-----Original Message----- >From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Guy Dunphy >via cctalk >Sent: Wednesday, September 25, 2019 4:01 PM >To: Brent Hilpert; General Discussion: On-Topic and Off-Topic Posts >Subject: Re: HP vintage boards being sold as scrap > >At 12:00 PM 25/09/2019 -0700, you wrote: >>On 2019-Sep-25, at 3:07 AM, Guy Dunphy via cctalk wrote: >> >>> Does anyone else recognise some of the other boards? >> >> >>There is a stack of IO interface boards, including HSTs, for the HP >2100/1000 series there. >> >>Lower-right stack in this pic, 7 boards, boards have one red and one grey >handle: >> https://i.ebayimg.com/images/g/n08AAOSwjY5dg5Kd/s-l1600.jpg >> >>"HS Terminal" is discernible on one of them, and the one on top looks to be >an HS Terminal as well. >>Can't be certain about the others but they have the same size IO connector, >they may all be HSTs. >> >>HSTs are the basic RS232 & current loop, async serial-line interface >boards, 12531D, used for the console and such in the 2100/1000 series, >>going back to the early machines of the series. >> >>(HS is 'High-Speed', but that's relative to the late-60s, billed for up to >2400bps, but it is possible to operate them at higher speeds). >> >>I'd buy one for, say 60$, if someone picks up the bunch and wants to flog >one. > > > >Sigh. And here I am putting together a rack with a HP 1000 system. >Though, some of those edge connectors look corroded. > >I really would like those DtoA boards. So many! I have both a 3497A and the >3498A extender >plus a need for lots of cards for them. Plus I have the service manual with >schematics >so can repair them. > >Anyway... the seller is listed as being in Warren, Rhode Island, United >States. >I'm in Australia, and have a reshipper in the US. BUT, the reshipper is on >the west coast. > >Is there anyone on this list who lives in that area who could pick them up, >then pack and post >small sets of boards? I can afford to bid (fingers crossed), but _can't_ >afford the postage >of "90 lbs" across the continent. Let alone to Australia. > >The one existing bid, is that anyone here? > >Guy > > >--- >This email has been checked for viruses by Avast antivirus software. >https://www.avast.com/antivirus > >

7 years

1
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0 0

NOS old media and other stuff available

by sales＠elecplus.com

Send him an email, and he can send you a list. He is NOT interested in selling 1 or 2 boxes of floppies. He needs volume deals. I have a list of items available from a Value Added Reseller that closed several years ago and had these items in storage. All items are OEM, NOS and include LOTS of data media spanning generations (Round Reel data tapes, 4mm Cassette tapes, ????? Tape Cartridges, 35???, 5.25??? and 8??? Diskettes), Trillium and EnGenius phone equipment, various electronics components and packaging materials. Have images of many of the items available. Email netbuy at bellsouth.net and or buynetworks at gmail.com Netbuy LLC Robb Adams 386-585-5236 Cindy Croxton Electronics Plus --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

7 years

1
0
0 0

DEC RP04 service manual available

by jnc＠mercury.lcs.mit.edu

> From: Evan Koblentz > I know of two RP04 drives in the wild. One belongs to a private > collector. VCF has the other. Right, but does VCF need it scanned? Oh, one other place that might have one: the MIT MC KL10 had a couple of RP04's; when it was taken away to Scandanavia, they might have gone with it. I think that machine is now at LCM? Noel

7 years

4
3
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Cleaning an old keyboard

by jnc＠mercury.lcs.mit.edu

> From: Al Kossow >> This is documented in NASA's official history of Project Mercury, for >> which it was invented. > could you post a pointer to the document where this appears? If the reference is to: Lloyd S. Swenson, James M. Grimwood, Charles C. Alexander; "This New Ocean: A History of Project Mercury"; SP-4201; NASA; Washington; 1966 "WD-40" does not appear in the index. There's another less likely book ("Project Mercury: A Chronology", or something like that), but I can't be bothered to drag it out and look, because I'm pretty sure that's incorrect. My understanding is that WD-40 was invented to protect the stainless steel skin of the Atlas ICBM (which was often left un-painted), built by Convair. I do recall seeing this in one of my Atlas books, which is alas currently not shelved, and I don't have time to find it. FWIW, Wikipedia agrees. The rest of that post (about how it's a waxy material in a solvent) is I think correct; it certainly agrees with its original intended usage (above). Noel

7 years

3
2
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DJ11 Maintenance Manual available

by jnc＠mercury.lcs.mit.edu

> From: Pierre Gebhardt > there seems to be a copy of the maintenance manual in the unibus-folder > on bitsavers: EK-DJ11-MM-003_DJ11_Maint_Man_Aug76.pdf Argh! I looked in that folder, but didn't see it! (And Manx says its not online, either.) > Would be worth checking the document revision. Mine's earlier: DEC-11-HDJAA-B-D. > What is missing, however, is an engineering manual with the schematics. Well, the M7820's will be the same as in the DH11. The M7285 and M7279 are DJ11-specific, though. I was going to say that 'does anyone even have any DJ11's any more, to need the drawings' (they're like lobotomized DZ11's - the serial line config is done with jumpers!), but on looking it turns out the RICM probably has some in their -11/45's. Noel

7 years

2
1
0 0

Cleaning an old keyboard

by trash80＠internode.on.net

I resurrected an old keyboard and mouse I like. Not wishing to gross anyone out but it looks like over time there was a build-up of oil etc from my hands etc and over time being stored away its turned to a really almost hard paste like stuff on both the mouse and keyboard. I've tried number of agents to clean it off but limited success. Any tips please. Kevin Parker

7 years

9
8
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simh, professional 350, 380

by emu＠e-bbes.com

Hi all, I saw an old version from 2006 as "xhomer" which emulates the professional 350. Was there anywhere a version, which emulates the 380? Cheers

7 years

3
4
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Wanted: Scan of RF modulator article in Sept. 1978 Radio Electronics

by wh.sudbrink＠verizon.net

Hi, I'd like to read the second part of the article found here: https://www.schematicsforfree.com/archive/file/Video/Circuits/Video%20Modula tor.pdf I don't have a real print of the magazine and my Google-Fu fails me if it's already scanned somewhere. Thanks, Bill S. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

7 years

4
4
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Vintage computer store hints in Minneapolis?

by jplist2008＠kiwigeek.com

Morning all; I was up in Minneapolis over the weekend and will probably be back next weekend - I was wondering where the local geeks might go for some nifty goodness (for sale or just to gander at)? When I was up there I hit FreeGeek and picked up a SCSI SyQuest EZ135 external drive and a couple of carts. I also rolled through The Ax-Man... for 3 hours because I'd never even heard of the place before and was absolutely astonished at what I'd found. (If you've never been, you _must_ go) But I thought I'd poll and see what else might be found up there? I'm mostly a non-PC collector (Sun/SGI/Digital/+ random things) - but easily amused. Speaking of, there's a set of power supply modules for a PDP at The Ax-Man on University. There were several h744s and 745s and and an h754, although one of them someone has started to pry apart and the Molex (?) connector is broken from the PCB, although the pins were still attached to the board. They were asking $9.95 for each and I wasn't willing to buy and hope they worked. Cheers; - JP

7 years

2
1
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Pro 350 for sale on Craigslist

by Wayne.Sudol＠hotmail.com

Just saw this ? https://orangecounty.craigslist.org/sys/d/laguna-niguel-vintage-dec-compute… Ad Says? Vintage DEC Computer 350 Pro System - $450 (Laguna Niguel) Vintage Digital Equipment Corporation (DEC) computer system 350 Professional ( based on PD-11 chipset) 10 MB HDD , Monitor VR-201, Printer : Letterprinter 100 , Enclosure, Extensive set of Documentation. These Items are intended for collectors who have good knowledge and experience with old computers

7 years

1
0
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sales@elecplus.com

by jnc＠mercury.lcs.mit.edu

Re: Cleaning an old keyboard Hey, that spiel would be a good start to a great article on the CHWiki, 'Cleaning keyboards'! (Not sure if any of the other replies contained anything worth picking up.) Noel

7 years

4
3
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Timex 16k Ram Expansion on GoodWill auction site

by bob099＠centurytel.net

https://www.shopgoodwill.com/Item/76238179 Ending today, just saw it

7 years

1
0
0 0

DJ11 Maintenance Manual available

by jnc＠mercury.lcs.mit.edu

So, I have a copy of the maintenance manual for the DJ11; is this something anyone needs?n If so, I'll move it up the scan queue. Noel

7 years

2
1
0 0

Tek logic analyzer probes available

by elson＠pico-systems.com

I have 6 Tek logic analyzer probes available. I have one P6464 pattern generator probe with a message about some bad channels (could have been the cable or pat gen board, too). There are 3 X P6452 analysis probes, and 2 X P6451. Anybody need any of these? Thanks, Jon

7 years

1
0
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Help identifying mystery Unibus board

by derschjo＠gmail.com

Hi all -- Found this in a stack of boards, and I don't know what it is, other than that it's Unibus -- there's a logo but no text identifying the board or the manufacturer. Anyone recognize the logo in this picture? http://yahozna.dyndns.org/scratch/random/board0.jpeg Here's the full board, for reference: http://yahozna.dyndns.org/scratch/random/board1.jpeg Thanks, Josh

7 years

5
5
0 0

flux to imd

by cclist＠sydex.com

On 9/21/19 10:26 AM, Al Kossow wrote: > > > On 9/21/19 10:12 AM, Mark J. Blair wrote: > >> Is it effective to bake cookies in their jackets? > I don't know, since i've never baked floppies. Chuck would know. Yes, I do. Usual 58C temps that I use for tapes. Doesn't seem to affect the jacket. --Chuck

7 years

3
2
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M7821 variants

by jnc＠mercury.lcs.mit.edu

So I just discovered that there are three wildly different variants of the M7821 Interrupt Control card. More here, with images: http://gunkies.org/wiki/M782_Interrupt_Control I'll have to dredge around and see if I can find circuit diagrams for them all; they are wildly different, the -C has many fewer components than the -B and -D, and the latter has a couple of delay lines. Noel PS: Sorry about that dis-directed message to Cindy; not quite sure what I did wrong there.

7 years

1
0
0 0

Manx entry update

by jnc＠mercury.lcs.mit.edu

> From: Jim Stephens > I don't know how to contact the maintainer for manx There was discussion recently about that, and I did manage (with help from someone here who provided his email - thanks muchly!) to reach him. We were discussing how I could help update things, but a hurricane came by, and I dropped it; need to continue. > Anyway I found that the entry for one of the entries is stale but the > internet archive had captured the tar file with the information. > ... > One of the questions is whether archive.org entries are desirable or > acceptible by the rules, and 2, whether the internet archive will be > okay with that. I see frequently that Wikipedia entries retrieve and > publish those links. I can't see how either would be a problem (as you point out with Wikipedia). As long as the bits are there, and won't go away (which I assume is true of the IA) that should be OK. Noel

7 years

1
0
0 0

Dot Matrix Printers - UK - Free to good (or even bad) home

by dave.g4ugm＠gmail.com

Folks, I have a couple of spare printers 1. Panasonic KX-P3626 wide carriage 24-pin dot matrix printer with sheet and tractor feed. Free to anyone who wants it. If needed I can throw in a box of music ruled fanfold paper. Comes with some spare ribbons. 2. Amstrad DPM2000 narrow carriage 9 pin printer. Sheet and tractor feed, but I can't spare a box of narrow paper. Located in south Manchester, North West England. I haven't tested but will do if there is any interest. Dave Wade G4UGM & EA7KAE

7 years

1
0
0 0

Manx entry update

by jwsmail＠jwsss.com

I looked for an image or record of the PDP8/L reference card, and one of the entries which showed up was for manx. I don't know how to contact the maintainer for manx but figure if someone can comment here it would be better than me ratholing and still not figuring it out. Anyway I found that the entry for one of the entries is stale but the internet archive had captured the tar file with the information. PDP-8 Pocket Reference Card http://manx-docs.org/details.php/1,5468 https://web.archive.org/web/20151121165042/http://www.vaxarchive.org/pdp11/… I did find this, and will try. Is something not working? Is a URL out of date or offline? Feel free to create a bug report <http://manx.codeplex.com/WorkItem/Create> on our CodePlex project <http://manx.codeplex.com> http://manx.codeplex.com/WorkItem/Create One of the questions is whether archive.org entries are desirable or acceptible by the rules, and 2, whether the internet archive will be okay with that.? I see frequently that Wikipedia entries retrieve and publish those links. Thanks. Jim

7 years

1
0
0 0

Vintage Computer Warehouse Liquidation

by guykd＠optusnet.com.au

At 04:59 PM 22/09/2019 -0500, Thomas Raguso wrote: >Update: I have also found IBM 500-series punch card equipment. If you find any full boxes of blank IBM punch cards, please mention. I might be able to afford postage on a few. > 1970s HP computers I'm probably going to cry when I see photos. (Because I'm in Australia.) Guy

7 years

1
0
0 0

MicroVAX 3100 ROMs

by shadoooo＠gmail.com

Hello, first of all, I would advice to READ the original eproms and compare with known good. This will possibly spare a lot of efforts... Andrea

7 years

1
0
0 0

Tektrionix VAXBI board and DC100 training tapes?

by mattislind＠gmail.com

An ex DEC engineer offloaded some stuff that he had found in his attic. https://i.imgur.com/413NSSL.jpg?1 It came together with a tektronix 1241 Logic Analyzer. Someone that can tell more about it? Then there were some DC100 tapes in a huge heap of TU58 diagnostic tapes for VAX-11/730 and VAX-11/750 that looked different. https://i.imgur.com/6n8yCxd.jpg?1 They were marked "BI-SYNC TRAINING TAPE" and "ASYNC TRAINING TAPE TAP-895-103-1.0 3.04" Anyone recognize what that could be? BTW. What are the status of various 11/730 and 11/750 diagnostics on TU58. Are those already dumped? It takes some time to work with TU58 so if someone already done all this I might skip dealing with them. I know of only one place that has TU58 dumps. http://iamvirtual.ca/VAX11/VAX-11-software.html Anywhere else? /Mattis

7 years

6
9
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DEC RP04 service manual available

by jnc＠mercury.lcs.mit.edu

So I have just acquired a copy of the service manual for the RP04 drive (ISS model 733). Does anyone have an immediate need to look at this? If so, I can put it on the top of the 'to scan' stack. Noel

7 years

4
4
0 0

Early Univac Commercial

by marvin＠west.net

I was watching an early airing of "What's My Line", and they aired a commercial by Remington Rand: https://www.youtube.com/watch?v=I-DNG_bbHDE The commercial starts about 19:30 and shows the Univac being used in a weather prediction. Not much useful information, but the video is quite interesting to watch. Marvin

7 years

5
5
0 0

MicroVAX 3100 ROMs

by athornton＠gmail.com

My MicroVAX 3100 gets stuck in boot with the leftmost 4 LEDs on, which indicates it's executed some instructions from ROM. That in turn may indicate that the ROMs are corrupt. From http://gentiane.org/~miod/machineroom/machines/digital/vax/3100-30/bare_mob… it looks as if the ROMs are a pair of M27C1024s. Mouser doesn't have those, but they do carry AT27C1024 in two different speeds. Those look like they should work. It looks like my ROM burner will support that, with an additional, not horrifically expensive, adapter. The machine is probably a ka42b CPU (I can check when I get home). That in turn suggests that the file simh/VAX/ka42b.bin (which is 256K, which is nice, since that is two megabits) is probably the image I need. So my major remaining question is: how are those chips laid out? Since they're 16 bits wide, I assume that what I really have is a 64kword memory image...but is one the bottom 32kwords and one the top? Or is one the left 16 bits of 64kwords, and the other the right 16 bits? In short, how do I slice the image from simh to put it into the replacement ROMs? Adam

7 years

1
0
0 0

analog computer - texas

by dave.g4ugm＠gmail.com

Seen on the vintage forums - I hope I am not spoiling some ones bid https://swicoauctions.com/online/26/item/43886 Dave Wade G4UGM & EA7KAE

7 years

6
5
0 0

PBXes at home

by michael.99.thompson＠gmail.com

> > Date: Thu, 19 Sep 2019 22:27:23 -0400 (EDT) > From: Ethan O'Toole <ethan at 757.org> > Subject: PBXes at home > > A number of years ago I picked up a Lucent Merlin Legend system. > > -- > : Ethan O'Toole > I have a little Merlin 410 PBX at home, with the Conference and Music on Hold plug-in modules. -- Michael Thompson

7 years

1
0
0 0

ISO: Keyboard for Intecolor 2400 terminal

by derschjo＠gmail.com

Picked up an Intecolor 2400 terminal awhile back; it's a nice VT100-compatible terminal with color enhancements. Unfortunately it's missing the detachable keyboard. Probably a longshot, but anyone have one of these lying around? Thanks, Josh

7 years

1
0
0 0

phone systems, old and less-old

by jnc＠mercury.lcs.mit.edu

> From: Kevin Monceaux > I'm not sure what it is about phone systems. ... I don't know why I'm > doing this. Oh, and the rest of us have a real use/need for old, slow, small (by modern standards) systems that use a ton of power? :-) Noel

7 years

1
0
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UNIBUS FTGH: EMM / CMU MICRORAM memories &

by tshoppa＠wmata.com

The Microram was a multipurpose solid state memory chassis sold by EMM (Electronic Memories and Magnetics) with what we called later in the 1970's a "personality board" that plugged it into each different CPU's backplane. They sold a similar system (maybe even plug compatible at some level) with core planes under "Micromemory" brand name. I see we already have a "emm" directory in bitsavers with docs about some of their core products.

7 years

6
9
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Another batch of fresh stuff from Sellam's collection

by sellam.ismail＠gmail.com

It's time for another batch of exciting stuff from my collection to find its way into yours! Today's batch: Compaq Contura 4/25 Compaq LTE/286 Laptop Compaq Portable III Operations Guide + System Software Packard Bell PB414A Multi-Media PC Radio Shack 1982 TRS-80 Microcomputer Catalog No. RSC-7 Radio Shack 1983 TRS-80 Microcomputer Catalog No. RSC-8 Radio Shack 1985 TRS-80 Microcomputer Catalog No. RSC-12 A Practical Guide to the Tandy 1000SX Heath Computer Systems H-386 Desktop PC Gravis MouseStick GMPU Logitech Wingman Attack Joystick Modular CIrcuit Technology PC EPROM Programmer Atari CX22 Trak-Ball Kingston DataCard KTM-DC16/127 Hard Disk/Memory Expansion Data General How To Use The Nova Computers Manual DEC Digital Products and Applications (1971) VAX Architecture Reference Manual Macintosh PowerBook 1400c Macintosh PowerBook 180 Apple 800K External Drive Apple PC 5.25 Drive AppleCD 300 AppleCD 300e Plus American Megatrends Voyager 486 Motherboard Zenith Data Systems N8003 External CD-ROM Drive Apple LisaDraw Manual Apple Lisa Office System Release 3.0 Manual Apple 486/66 DOS Compatibility Card Asante MC3NB NuBus Ethernet Interface Kingroyal 2-serial, 1-parallel, 1-game Interface STB 2-serial 1-parallel interface Sealevel Systems 3088 dual-port serial card Cardinal Technologies VGA 300 IEV Corp. VIP-2000 Interactive Graphics Controller Datacopy Corp. Datacopy Model III Domex UDS-IS10 SCSI interface Talking Tech Bigmouth Your PC Multi-Lab PCL-711 Analog and Digital I/O Card Danford SEU 3800 multi-port serial card Triad Systems PC-IDC-8 8-port ISA Serial Interface U.S. Digital PC7166 Incremental Encoder Interface Western Digital WD1003V-MM2 HD/FD Controller (Prototype?) Supra SupraExpress 33.6i Voice Modem 3Com EtherLink III 3C509B-TPO Allied Telesis AT-2000T-PNP TP ISA network interface Advanced Logic Research 16-bit VGA/Parallel Iwill SIDE VLB SCSI/IDE/FDC/I-O Controller Adaptec AHA-2940UW Ultra Wide SCSI Controller Berkshire Products PCI PC Watchdog BusLogic BT-958 SCSI-3 Adaptor Network Appliance 110-01579 PCI NVRAM Board Ocean Optics ADC2000-PCI+ A/D Converter Philips TV Tuner PCI Board S&S Research MOTU PCI-324 Audio PCI Interface Smart Modular Technologies 90079 Modem/Sound Combo Board ATI Rage IIc AGP Graphics Card Asus V8170/128M AGP Graphics Card Matrox G45+ AGP Graphics Card IBM 2330364 Token Ring Network Adaptor 16/4 SCO Informix v3.11 for the Apple Lisa 2 SCO Lyrix v3.10 for the Apple Lisa 2 SCO MF/SCO Level II COBOL v2.0 High Performance SCO Multiplan v2.10B for the Apple Lisa 2 SCO Xenix Development System v3.0 for the Apple Lisa 2 SCO Xenix Operating System v3.0 for the Apple Lisa 2 SCO Xenix Text Processing System v3.0 for the Apple Lisa 2 Hands-On BASIC for the IBM PCjr HP 82901M Flexible Disc Drive HP 9885M Flexible Disk Drive HP 10247A Clock Probe HP 10248B Eight Bit Probe HP 10248C Eight Bit Probe (Pod 1) HP 10248C Eight Bit Probe (Pod 2) HP 10248C Eight Bit Probe (Pod 3) HP 10248C Eight Bit Probe (Pod 4) HP 10248C Eight Bit Probe (1610B) Convergent Technologies NGEN XM-003 Memory Module Wico Command Control Joystick Links to the newly listed items can be found in the usual place: https://docs.google.com/spreadsheets/d/1I53wxarLHlNmlPVf_HJ5oMKuab4zrApI_hi… As always, please contact me directly by e-mail <sellam.ismail at gmail.com> to inquire about an item. Thanks! Sellam

7 years

1
0
0 0

FTGH: EMM / CMU MICRORAM UNIBUS memories & docs

by fritzm＠fritzm.org

Okay, I'm trying to beat back the hoard in my basement before the rainy season starts here in CA: I have a couple of NMOS static RAM UNIBUS address spaces that I picked up from CMU sometime back in the mid-'80s once when they were cleaning house. I've been hauling these around for 30+ years, thinking I would use them with the '11/45 that I picked up at the same time, but as previously discussed here I have a much more practical MS11-L working in that system now. So, I'd be more than happy to pass these one to somebody else who could put them to good use? There are two; they are 5U 19" rack chassis with integrated power supplies and fans. These are card cages with slots for 5 11"x15" cards plugging, into a PCB backplane (big, heavy!) Each chassis contains four fully-populated MICRORAM 3400N memory cards (at 32K words x 18 bits each, each chassis is a full UNIBUS address space); each of the memory cards caries 144 x socketed 4402ACC, with 1977 date codes. Each chassis also has a fifth card, a custom UNIBUS interface card that was developed at CMU, which takes the place of the self-test card in the original units. The units are marked S/N 100001 and 100002, P/N 929331-009A. They are in good shape, but dusty, and with some corrosion evident on the chassis. Have not seen power in several decades, so the power supplies probably need a going over... I also have full documentation (including schematics), and a folder of schematics and some hand-drawn notes for the CMU interface cards. I have dups of the EMM documentation, so could send it to Al if he is interested? Anybody out there interested? I am in Oakland, CA. It would be best to pick these up in person, because they'd probably be $$$ to ship. cheers, --FritzM.

7 years

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RetroChallenge RC2019/10 is now open

by Michael＠jongleur.co.uk

Greetings all, I?ve now taken over custodianship of the RetroChallenge and would like to extend an invitation to any who are interested in joining in this October. Entry details at: http://www.retrochallenge.org Retro COMPUTE ;) -- *Blog: RetroRetrospective ? Fun today with yesterday's gear??.. <http://www.jongleur.co.uk/blogs/>* *Podcast*: *Retro Computing Roundtable <http://rcrpodcast.com/>* (Co-Host)

7 years, 1 month

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Partial success (SIMH TSS/8), new problem has me stumped

by charlesmorris800＠centurytel.net

I finally managed to get TSS/8 running under SIMH V4... console on the laptop, a time-sharing line (TTIX port 23) on an ADM-3A (much quieter while debugging) :) The interface is the Volpe current-loop to USB board, a small freeware program "COM By TCP" to allow a TCP port (USB is COM4, TCP is 127.0.0.1 port 23). So far so good. But I am having connection problems with the data coming >from SIMH to the terminal. At 110 baud I only get a few characters before the serial-TCP program hangs with this write-timeout message: 22:24:11: Socket connected to 127.0.0.1:23 22:24:11: SOCK: Unable to write on COM. The port is CLOSED.. <-- this is because I didn't "Get COM" first. 22:24:13: COM4 correctly opened! 22:24:24: System.TimeoutException: The write timed out. at System.IO.Ports.SerialStream.Write(Byte[] array, Int32 offset, Int32 count, Int32 timeout) at System.IO.Ports.SerialPort.Write(Byte[] buffer, Int32 offset, Int32 count) at COMbyTCP.Form.sockClient_dataRecived(Byte[] buffer, Int32 bytesRecived) I tried at 1200 baud and the same problem occurs, I can just get more characters before the terminal screen freezes. Nothing's locked up except the downstream SIMH data (i.e. I can hit Return on the terminal and the TSS/8 dot prompt reappears). It is repeatable regardless of what I am trying to do on the terminal. Only very small outputs come through in their entirety without this error message. I don't think it's the current-loop board, which has an onboard micro fast enough to translate Baudot on the fly. And the receive light stops flickering at the same time the write timeout message pops up. Does anyone know how I can extend the timeout parameter... is this a Windows networking problem, or something flaky in the freeware serial-TCP program? thanks Charles --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

7 years, 1 month

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Connecting SIMH to teletype via USB

by charlesmorris800＠centurytel.net

I could use a hint... I have a USB to current-loop (Volpe) interface board, and Windows 7 on my laptop does recognize it as COM4 at 110 baud. So far so good. No problem hooking it up to my ASR-33 Teletype. Now I'd really like to figure out how to set SIMH to use the 33 as the console, so the TTY will be attached to the virtual PDP-8. I do have OS/8 and TSS/8 running on SIMH with the laptop as console. Just don't know how to make it "talk" to the USB serial port instead. Anything that starts with "set console..." gives a "no settable parameters" error. Thanks for any hints. -Charles --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

7 years, 1 month

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Test message

by tmfdmike＠gmail.com

I was banned for ages, I've been told I'm not any more; test post; disregard. Mike

7 years, 1 month

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Connecting SIMH to teletype via USB

by charlesmorris800＠centurytel.net

I got ahead of myself a little bit... forgot I still couldn't connect a serial port to SIMH. Turns out my version of SIMH 3.08 was from 2008 or so... I just downloaded the latest version 4 from GitHub and sure enough it does accept SET CONSOLE SERIAL. Now I just have to figure out the port name since it doesn't like COM4: But I'm almost there :) -----Original Message----- From: Charles Sent: Friday, September 13, 2019 6:46 PM To: J. David Bryan ; cctalk digest Subject: Re: Connecting SIMH to teletype via USB Update: got my SIMH (set console telnet:23) talking to PuTTY in another window, via Telnet 127.0.0.1:23. So it is possible ;) Now it's time to hook up the actual TTY to the USB-current loop card and see what's what! -----Original Message----- From: J. David Bryan Sent: Friday, September 13, 2019 6:23 PM To: General Discussion: On-Topic and Off-Topic Posts Cc: Charles Subject: Re: Connecting SIMH to teletype via USB On Friday, September 13, 2019 at 15:42, Charles via cctalk wrote: > I could use a hint... I have a USB to current-loop (Volpe) interface > board, and Windows 7 on my laptop does recognize it as COM4 at 110 > baud. So far so good. No problem hooking it up to my ASR-33 Teletype. > > Now I'd really like to figure out how to set SIMH to use the 33 as the > console, so the TTY will be attached to the virtual PDP-8. Section 3.14, "Console Options" of the "SIMH Users' Guide V4.0" suggests that: set console serial=com4;110-8n2 ...should work (though you might need "7e2" or "7o2" instead, depending on how your Teletype is set up). > Anything that starts with "set console..." gives a "no settable > parameters" error. Does the above also give this error? -- Dave --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

7 years, 1 month

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Test message

by charlesmorris800＠centurytel.net

Sorry, we did not receive your message. Have you tried turning it off and back on again? :) --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

7 years, 1 month

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IBM System/32 available in Helsinki

by binarydinosaurs＠gmail.com

Folks, I've been made aware by Michael Ross (who for some reason can't join this list) that there is a System/32 available for not much money in Helsinki. If you're 100% interested the contact is stidialla at gmail.com Cheers! -- adrian/witchy Owner of Binary Dinosaurs, the UK's biggest private home computer collection? t: @binarydinosaurs f: facebook.com/binarydinosaurs w: www.binarydinosaurs.co.uk

7 years, 1 month

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MSV11

by useddec＠gmail.com

Hi Doug, If you are going to VCFMW, I can bring you a DEC M8044 for $25. Need anything else? Thanks, Paul

7 years, 1 month

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Heath/Zenith Z100 technical...

by jules.richardson99＠gmail.com

I just picked up a board set from a Zenith Z-100 (not sure if it was a 110 or 120 model) which had been junked. I threw this out on the sebhc mailing list too, but perhaps someone here knows: a) If the machine's keyboard is completely passive (i.e. just a bunch of switches), or if there's any intelligence to it, b) If the system will start up with no boards plugged in (other than the bitmap display PCB) - i.e. no S100 FDC or winchester, c) If "yes" to the previous, whether the mainboard/bitmap board will function on just +5V and +/-12V (i.e. without the S100 +8V and +/-16V rails) Trying to power up what I have might be fun, but I'm really not sure about the lack-of-keyboard issue - if it's just switches and decoded via the mainboard then rigging something might be possible, but if there's some kind of higher level serial protocol involved then maybe it's too much hassle. I don't have a S100 bus machine kicking around to power things with at present (but of course rigging something would not be too difficult). I'm not sure what kind of details the documentation went into, either - I've got a Z-89 and the docs there are extremely technical, with full schematics, but I'm not seeing any equivalent online for the Z100 series (there seems to be very little out there about them at all - came too late in the S100 era, perhaps?) cheers Jules

7 years, 1 month

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Ferroresonant transformer supply repair

by kylevowen＠gmail.com

Has anyone replaced the capacitor in a ferroresonant power supply with much success? My current understanding is that the capacitor and transformer are mated as a pair, so replacing just one of them would require careful consideration. The PDP-8/I I'm working on has a 704A in it, with a GE 8uF 660V capacitor. It measures a couple of nF on my capacitor meter, and I was told by the previous owner that it's dead. Any advice? Thanks, Kyle

7 years, 1 month

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Ferroresonant transformer supply repair

by malcolm＠avitech.com.au

>Thanks! Someone else pointed me to Mouser as well. Was hoping to find something in stock, but I guess I can wait and go with Mouser; after all, the PDP-8/I has >been waiting well over 30 years for a new capacitor! > >Kyle It looks like Farnell/element14 have a couple in stock -> https://au.element14.com/search?st=8uf%20660v Element14 Order Number 2668607 Malcolm

7 years, 1 month

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Looking for schematics of QBUS 32KW memory module.

by vintagecomputersmn＠gmail.com

Hello, A few weeks ago I ordered a Sigma 400255 for my H11A LSI-11 computer with the hopes of getting a 8" floppy hooked up for VCFMW. For the most part, all the tests I ran from the ODT seemed to be AOK. The one this I couldn't do it boot RT-11 from my TU58 emulator, as it would crash every time. Every since I was able to boot RT-11 on my machine it has been unstable and prone to crashes, but i chalked that up to the TU58 emulator, and not the machine itself. Since I needed to boot from to TU58 in order to INIT and make a bootable RT-11 disk for my system, I looked for other causes for the crashes. I ran the VKAA XXDP test, which passed fine. I then ZKMA test, which lo and behold listed back there were numerous bad addresses all over memory. The only memory modules I have are 3 nearly identical 3rd party 32KW memory modules. The one that I have in the system right now came with it, and is the one with memory errors. The other two are ones I bought on eBay that are in rather poor condition and currently do not work at all. I was hoping to transfer some of the 4116 chips from my nonfunctional units over to my semi-functional unit, but I cannot find schematics for any of the boards because they don't have any marking identifying marking on them. If anyone knows where I can find schematics for these boards, that would be wonderful. I am including a picture of one of these boards below. https://i.ibb.co/sQwZw0j/32kwram.jpg Thank You, Gavin Tersteeg

7 years, 1 month

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ISO old AST mainframe comms driver software

by aek＠bitsavers.org

AST-coax, AST-432, AST-SNA, etc. IBM comms products circa late 80s I'm in the process of pdf-ing the manuals this afternoon. The only product disk I have is AST-3780

7 years, 1 month

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Announcing VCF Pacific Northwest 2020

by mbbrutman＠brutman.com

The Vintage Computer Federation is pleased to announce Vintage Computer Festival Pacific Northwest 2020! We will be at Living Computers:Museum+Labs in Seattle Washington on Saturday March 21st and Sunday March 22nd, 2020. To make this happen we are looking for exhibitors, speakers and volunteers. Last year we had 28 exhibits and 6 presentations. We had a great time, we broke the museum attendance record (again), and we are looking to have a good time again in March. If you are thinking of traveling from outside of the region there is plenty to do in Seattle while you are here. Local attractions include the Connections Museum, the Pacific Science Center, MoPOP, the Boeing factory tour, Mr. Rainier, etc. Victoria, British Columbia is also a short distance away. See a more complete list at https://goo.gl/3emMWH . Details about VCF PNW 2020 can be found at http://vcfed.org/vcf-pnw . The exhibitor registration instructions can be found at http://vcfed.org/vcf-pnw/exhibitor-registration . I'm happy to answer questions by email too. Regards, Mike mbbrutman at brutman.com or michael at vcfed.org

7 years, 1 month

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Looking for schematics of QBUS 32KW memory module.

by jnc＠mercury.lcs.mit.edu

> From: Mister PDP > listed back there were numerous bad addresses all over memory. > ... > I cannot find schematics for any of the boards You can repair MOS memory boards where the board is basically working, but just has some failing memory chips, without schematics. First you need to create a map which translates memory chip # to bits. You have 32 chips in the array, so there are probably 2 32KB banks, each 16 bits wide. Pull a chip, and then try and figure out which bit it is; then repeat with other chips to try and figure out which bits are stored in which chips. (Unless the designers were insane, each chip will hold the same bit in all the words in that bank.) On yours, the memory chips are in sockets, which makes this less painful. (On boards where the chips are soldered in, a program which loops, storing a word with a single 1 bit, can be used to the same effect; the chip data sheet will tell you which pin is the data pin.) Usually a missing chip results in bits stored in that chip reading as '0', but it's possible they will read back as 1. Anyway, to test the first possibility, start by finding a location in the each bank that can be written to all 0's and all 1's (read back after writing to verify). Next, pull a chip, and then try writing all 1's to that word in the low bank, and read it back. If it now has a 0 bit, congratulations i) you've verified that missing chips read as 0, ii) that chip is part of the low bank, and iii) the 0 bit tells you which bit that chip is - fill in that entry in your chip<->bit chart. If not, try the high bank word, and see if it now has a 0 bit. If not, try writing 0's to the high and low words, and check for a '1' bit; if so, i) missing chips read as 1, etc. If neither is true, check back here! Otherwise, try pulling another chip, and work out which bit that one is, and add it to the chart. Repeat for all 32 chips - although if you're lucky, after a couple you might find a pattern, and be able to predict which chips hold which bits. (But not always; many are random; see e.g.: http://gunkies.org/wiki/Q-RAM_11 http://gunkies.org/wiki/NS23M for some.) If so, do a few spot tests of your predictions to make sure your pattern is correct. With the completed chart in hand, given a failing word (address and bad data), you can work out which chip is at fault, and replace it. Repeat for all memory errors. Noel

7 years, 1 month

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Mohawk Data Sciences 6401 Schematic?

by coryheisterkamp＠gmail.com

Hey Guys, I recently picked up an MDS 6401 Key-To-Tape unit in NCR guise to park next to my keypunches. It's been in storage for a couple decades and is in pretty decent shape. Even has a tape on it from when the university that had it pulled the plug and sent it off for surplus. Found an internal date code of 1971. The unit does actually show signs of life, but I suspect a power supply issue. Does anyone have a lead on a schematic? This here is basically what I'm working with: http://www.thecorememory.com/NCR_C-735_-_MDS_6401_Memories.pdf Thanks, Cory

7 years, 1 month

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Info on testing vintage power supplies

by aperry＠snowmoose.com

Can anyone here provide a pointer to info on testing vintage power supplies? Search results on the web may eventually lead to the kind of info that I am looking for, but I have to get through too many pages of modern PC power supplies first. Specifically, I will be testing the power supplies in my Sun 3/260, which has 24V, 12V and 5V. I am wondering things like what is suitable loads and do I need to put a load on all three or can I test them one at a time and what I haven't thought of with regards to testing them. alan

7 years, 1 month

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Searching cctalk/cctech

by aperry＠snowmoose.com

Is there a way to search all of cctalk and cctech? I found the archives, but that is split all of the postings in a given month. alan

7 years, 1 month

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Shugart-Interface 8" Floppy Diskette Drive Configurability

by nf6x＠nf6x.net

I've been contemplating a floppy diskette drive emulator with features to make it fit better into systems using 50-pin Shugart style floppy drive interfaces vs. the other emulators already on the market. Studying manuals for various 8" floppy diskette drives, I see that they generally provided a great deal of configurability. There are the myriad of jumper-selectable options which change drive behavior for compatibility with various computers. Then there are features like FM data separators which are present on some, but not all, drives. And then there are many documented "cut this trace, then bodge wire this signal to pin X of the edge connector" options for special purposes such as individual drive motor controls, simultaneous monitoring of all four drive ready signals, etc. Since fully supporting all of the options I've seen documented would have real hardware cost and add complexity to the design, I'm wondering just how much of that configurability is really necessary. Which non-default options are really needed for system still in use and/or in the hands of collectors? Which were only ever provided for some obscure industrial system manufacturer, with no surviving systems in existence? Which were included just in case somebody might need them, but were never used in practice? I'd appreciate it if anybody can provide insight into this, such as examples of systems which required non-omnipresent and/or non-default configuration options. -- Mark J. Blair, NF6X <nf6x at nf6x.net> http://www.nf6x.net/

7 years, 1 month

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Data General/Rolm milspec systems

by technoid6502＠gmail.com

Message: 4 Date: Thu, 5 Sep 2019 10:03:54 -0400 From: "Craig M." <cmook1968 at gmail.com> To: cctalk at classiccmp.org Subject: ROLM - Dat general 1602 - AN/UYK-19 computers. Message-ID: < CAD1aQJ5FnQDS7i+iLeh-+zBSBrzaqV9-f61Q76XgEbz=fSN+nw at mail.gmail.com> Content-Type: text/plain; charset="UTF-8" Good Morning, Have you ever come across a document called the "Rolm I/O Designers Guide?" I am working with some developers trying to figure out the data words and how they work on a Navy AN/UYK-19 computer. I have some sticktime on the Eclipse machines. In going to boot camp getting my MV4000/DC I ran into some interesting characters. One was with DG on military sales, was visiting Groton? or another base where a test was being conducted. The computer was suspended on wires in a hangar and, while running, was subjected to simultaneous blows from heavy pendulums on either side. The noise was teriffic and my friend asked the same question, why on earth, to which the cryptic reply was two words: Depth Charges. Probably your USAF machine, corn field kept though it was, was designed for service in another kind of silo, the missile kind. Those would be projected to survive near-direct hits from megaton thermonuclear weapons. Not to mention that no air force property is immune from attack by all sorts of ordinance, nuclear or otherwise. Best, Jeff Another note, saw an old query on the "Rolm Computers: 1602, 1602A, 1602B, 1666, MSExx (was Data General Nova Star Trek)" thread about breaking down the military system designations. This website may help if you never got an earlier answer: https://dsm.forecastinternational.com/wordpress/2015/05/27/whats-in-a-name-… Thank you! Craig Mook

7 years, 1 month

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keyboard list

by sales＠elecplus.com

This is the next list of keyboards I can bring in. Anybody want some of this? 2 IBM 6052141 IBM 1391401 missing some keycaps Apple M3501 nice ,no pluggable connect cable WYSE PCE,p/n 900840-01 Din-5 connector Data Desk Int,new/unused Din-5 Datatech SBK-100 Cadmus 00185-00 (dark grey) no plug-in connect cable 2 Chicony KB-5311 very nice Din5 Commodore KPR-E9447 unused Din 5 Honeywell 101WN unused Din-5 Keytronic KB101 Plus Din-5 Mitsumi KPQ-EA9YC looks good Din-5 Mitsumi NPQ-E99ZC-13 Din-5 HP C14058 If so, please send price offer for what you want. Shipping will be extra. Yes, I will ship internationally. Cindy Croxton Electronics Plus 1613 Water Street Kerrville, TX 78028 830-370-3239 cell sales at elecplus.com --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

7 years, 1 month

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Seeking enlightenment regarding Bus Adapter Purges on Unibus VAXen (and their ilk)

by derschjo＠gmail.com

Hi all -- Been working on an MSCP implementation for Joerg Hoppe's Unibone project, and it's working well on PDP-11 systems; less well as of late on the VAX. I've been looking to tidy up a few dark corners in the MSCP spec and one thing that's left is bus adapter purges -- I have a pretty good grasp of Unibus mechanics these days but I'm not quite understanding the reasoning behind this. Here's what the Storage System Unibus Port Description (AA-L621A-TK) document says: "To support such higher-level protocol functions as transfer restarts, compares, etc., the host memory interface must allow repeated access to a given host memory location for both reads and writes. On purely Unibus systems such as 11/44, this requirement is trivially met with no participation by the host CPU. On systems with bus adapters such as the 11/780, the repeated access requirement means that the relevant adapter channel may have to be purged, requiring the active cooperation of the host CPU. The port signals its desire for an adapter channel purge by interrupting the host. The host writes zeroes to the SA register to indicate purge completion." This is also discussed, from the bus adapter point of view, in the technical documentation for the bus adapter itself. (See http://www.vaxhaven.com/images/2/29/EK-DW780-TD-001.pdf) It hasn't been particularly enlightening to me, but I will admit to not having read every page of this and the DW780 doc -- maybe I missed something :). I understand the mechanism here; in essence it's: 1) MSCP controller decides a purge is necessary after a DMA transfer and requests one by setting a value in a reserved slot in the communications area 2) Host system (MSCP driver) sees the special value, and issues a purge command to the bus adapter. 3) Host system then clears the value in the communications area 4) MSCP controller continues on its merry way. What I do not understand is (a) why such purges are necessary, and (b) how the MSCP controller knows when one should occur. The Port Description doc hints that it has to do with repeated access to a given area of memory. The DW780 documentation hints that it needs to happen after *any* block transfer. (See pg. 2-58 of the document linked above.) Anyone have any experience with this? Thanks! Josh

7 years, 1 month

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ROLM - Dat general 1602 - AN/UYK-19 computers.

by cmook1968＠gmail.com

Good Morning, Have you ever come across a document called the "Rolm I/O Designers Guide?" I am working with some developers trying to figure out the data words and how they work on a Navy AN/UYK-19 computer. Another note, saw an old query on the "Rolm Computers: 1602, 1602A, 1602B, 1666, MSExx (was Data General Nova Star Trek)" thread about breaking down the military system designations. This website may help if you never got an earlier answer: https://dsm.forecastinternational.com/wordpress/2015/05/27/whats-in-a-name-… Thank you! Craig Mook

7 years, 1 month

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A fun patent to wrap your head around

by aek＠bitsavers.org

5287534 "Correcting Crossover Distortion Produced When Analog Signal Thresholds Are Used To Remove Noise From Signal" It describes the DEC CXM04 board for the DS550 communications server, which inserts itself between an IBM establishment controller and a control unit (coax) terminal so the CUT can pretend it's a serial terminal to VAXen without dropping the polled connection to the IBM mainframe. weird..

7 years, 1 month

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Wanted: ATV Research Pixie-Verter

by wh.sudbrink＠verizon.net

Hi, For historical reasons (I'm starting to plan my VCF East 2020 exhibit) I'd like to get real ATV Research PXV-2A Pixie-Verter. I know that there were a lot of other RF modulators out there (I have a SUP "R" MOD II (that I might trade)) but I want this one in particular. Various S-100 boards and other vintage computer hardware available for trade or cash if necessary. Thanks, Bill Sudbrink --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

7 years, 1 month

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pdp11/34s FTGH in Dublin Ireland

by ronan.scaife＠dcu.ie

Dear All (mainly UK and Ireland), We have a "lo-boy" DEC cabinet containing 2x pdp11/34a in half height boxes, and 2x RL02 drives. It is available for free to be collected in north Dublin, 5 miles from Dublin port. It is also about to be scrapped, so urgent action is required. Please contact ronan.scaife at dcu.ie. Best Wishes, -- -- ?This Email, and any files transmitted with it, are confidential, and are intended solely for use by the addressee. Any unauthorised dissemination, distribution or copying of this message and of any attachments is strictly prohibited. If you have received this email in error, please notify the sender and delete the message. Any views or opinions presented in this email are solely those of the author and cannot be relied upon as being those of Dublin City University. Email communications such as this cannot be guaranteed to be virus-free, timely, secure or error-free, and we do not accept liability for any such matters or their consequences. Please consider the environment before printing this Email.? ==== Dr. Ronan Scaife =============== ronan.scaife at dcu.ie ========== School of Elec Eng, Dublin City University, Dublin 9, IRELAND. http://www.eeng.dcu.ie/~scaifer/ phone (office): +353-1-700-5434 fax: +353-1-700-5508 ==================================================================== -- * *S?anadh R?omhphoist/Email Disclaimer* *T? an r?omhphost seo agus aon chomhad a sheoltar leis faoi r?n agus is lena ?s?id ag an seola? agus sin amh?in ?. Is f?idir tuilleadh a l?amh anseo.? <https://sites.google.com/view/seanadh-riomhphoist>* *This e-mail and any files transmitted with it are confidential and are intended solely for use by the addressee. Read more here. <https://sites.google.com/view/dcu-email-disclaimer>* * -- <https://www.facebook.com/DCU/> <https://twitter.com/DublinCityUni> <https://www.linkedin.com/company/dublin-city-university> <https://www.instagram.com/dublincityuniversity/?hl=en> <https://www.youtube.com/user/DublinCityUniversity>

7 years, 1 month

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SMD disks

by aperry＠snowmoose.com

My Sun 3/260 came with a pair of 8-inch SMD disks in a separate cabinet. 1. Anyone have a pointer to docs that describe cabling and configuring SMD disks? My Google-fu has failed here. 2. The system came with no cables (external cables between cabinets). Are these standard cables or will they be Sun-specific? 3. The system "ran when parked" about a dozen years ago, but it was left in an open barn after that. How likely is it that the disks will work and be readable? One is a Fujitsu M2333; don't recall what they other one is. alan

7 years, 1 month

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