test-drb

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101090 discussions

by bpettitx＠comcast.net

Chuck Guzis wrote: One more category springs to mind--5xx would be printers (e.g. 501 and 512). Maybe I;m trying to forget about what it was like having a machine gun on one side (501 drum printer) and a screaming banshee (512 train printer) on the other side. 8xx also includes drum storage. ------------------------------------------------------------------------ To add a little more: 1XX was test equipment; 3XX was paper tape equipment; 7XX was interconnect gear. Later the numbers were changed to an elaborate code that used 2 Alphanumerics a dash, 3 more alpha numerics. This was later modified to include another dash and alphanumeric. For example, a disk drive might be: BJ-3A4-C. There is a model decoder somewhere on bitsavers. And there was a whole family of unique specially designed peripherals called SPAM boxes = Special Purpose Alogrithm Machines. These were usually all electronic. Most were used in the oil industry; for example strip recorders/readers for seismic data. One I worked on a lot when in Houston, would add up all the one bits in a large field of data. For some applications, the petrol companies loved it. Inital telecommunication products started here then evolved into their own families. Chuck, I'll swap you for the time I was at CERN working on 627 (one inch) tape drives and some idiot rewound 24 of them at the same time. It was a gag they pulled on new operators. It could take an hour before you could hear people talk again. Billy Pettit

11 years, 2 months

Looking for VAXStation 3520 parts

by jnc＠mercury.lcs.mit.edu

Sean Caron <scaron at umich.edu> wrote: > I remember long ago there used to be a really neat site about the > VAXstation 3520/3540 machines but it's long gone ... Any chance you have the URL noted? If so, the WayBackMachine might still have it. Noel

11 years, 2 months

HP board id?

by COURYHOUSE＠aol.com

Many Thanks for the HP 1000 interface board manual... We have the old one here at the museum with the 2115, 2116 etc but it has gotten brittle on the back binding and if we do not have to open it....... At one time when we would building voice boards to the 2000/1000 series back then we had scored a batch of blank IO proto boards with the buss tag traces on them.. be interesting to see if I saved any... Thanks ! Ed# _www.smecc.org_ (http://www.smecc.org) In a message dated 5/16/2015 3:42:18 P.M. US Mountain Standard Time, pbirkel at gmail.com writes: That is a *really* nice document, in so many ways. Thanks for sharing, and for the answers to earlier questions :->. On Thu, May 14, 2015 at 11:31 AM, J. David Bryan <jdbryan at acm.org> wrote: > On Thursday, May 14, 2015 at 1:46, Paul Birkel wrote: > > > What do they recommend on the receiver-end? > > LSTTL with a 4.7K pulldown to -2V on the input. > > > > Is the "HP 1000 M/E/F-Series Computers I/O Interfacing Guide" > > (02109-90006 September 1980) available online somewhere? > > I thought I had sent it to Al some years ago, but it's not listed. In any > case, I've posted it here: > > http://home.earthlink.net/~jdbryan/dropbox/02109-90006_Sep-1980.7z > > See chapter 5, pages 5-5 and 5-6. > > -- Dave > >

11 years, 2 months

FW: Altair 8800 Electrical Engineer Estate "lot"

by rich.cini＠verizon.net

All ? I thought I would pass the attached on to the group. Please let me know if the attachment (Word doc) doesn?t come through and I?ll send it separately to those interested. I received the attached email, unsolicited. Looks like two complete Altair systems for sale for $7,000, with offers considered. No location is given in the listing but the area code points to Washington State (Olympia??). Rich -- Rich Cini Collector of Classic Computers Build Master and lead engineer, Altair32 Emulator http://www.classiccmp.org/cini http://www.classiccmp.org/altair32 From: Richard Cini <rcini at msn.com> Date: Saturday, May 16, 2015 at 10:54 AM To: Richard A Cini <rich.cini at verizon.net> Subject: FW: Altair 8800 Electrical Engineer Estate "lot" From: ecyclenw at msn.com To: ecyclenw at msn.com Subject: Altair 8800 Electrical Engineer Estate "lot" Date: Fri, 15 May 2015 01:32:57 +0000 Hi, You are receiving this e-mail due to interest expressed as a collector, on theantiquecomputer.com. Please find attached a word document with the information and details of this Altair 8800 Estate Lot. More photos available. Also, please pass this information to anyone who may be interested. Thank You Dan Dan Tharp EcycleNW dan at ecyclenw.com ecyclenw at msn.com Sent from Windows Mail

11 years, 2 months

Intellec MDS available in Twin Cities MN

by mainpatents＠gmail.com

Am I too late? Still available for sale? Richard I really need some cash and some space, so it's time for my Intel Intellec MDS gear to find a new home. I inherited this kit some years ago, and know almost nothing about it - in fact, I'm even confused as to the correct model number; 'experts disagree', it's either an MDS-225 or MDS-800. It's a large white cube, about 20" on a side, with a CRT, one 8" floppy and a number of plug-in boards. There is also a blue Intel dual 8" drive, one seriously heavy-duty keyboard, a few cables and a bevy of 8" floppy discs. I also have an ICE pod for it, somewhere.. It has never been powered-up once since I've had it, though it was apparently 'working fine' when retired sometime in the early-mid 1990s. Cosmetics are very good, it's no ugly duckling by any stretch. Photos will appear as I'm able to move it to a location with sufficient light. *Richard Brewster Main, Esq.* *Of Counsel*Main Cafe invention & patent development Newark, CA 94560 +1 408 409 6246 http://www.maincafe.us/ CONFIDENTIALITY NOTICE: E-mail may contain *attorney-client confidential information* that is legally privileged. Do not read this e-mail if you are not the intended recipient. This e-mail transmission, and any documents, files or previous e-mail messages attached to it may contain confidential information that is legally privileged. If you are not the intended recipient, or a person responsible for delivering it to the intended recipient, you are hereby notified that any disclosure, copying, distribution or use of any of the information contained in or attached to this transmission is STRICTLY PROHIBITED. If you have received this transmission in error, delete it, please immediately notify us by reply e-mail to mainpatents at gmail.com or contacting us by telephone at 408-409-6246

11 years, 2 months

ROM dumps of Intel MDS-2 IOC

by mainpatents＠gmail.com

F.Ulivi, I have an MDS-225 on a breadboard for easy access. I bought it in pieces and now getting it going. I believe I may be able to dump all the EPROMS in my Pro-Log M980 and het hexfiles over USB-232 to my WINDOWS laptop to email to you. I just got the Intel 2708 personality module for the Pro-Log and not sure its working. On the built in CRT, Intel used the Ball Brothers TV120 with an early VGA interface. It is TTL with /VERT, HORIZ, and VIDEO. You can wire up a modern DB25 VGA monitor to the IOC and hook each of R G B through 270 ohm resistors to IOC VIDEO. maybe need to invert the vertical sync. Richard I'm looking for the images of ROMs installed on the IOC (I/O controller) board of Intel MDS-2 development systems. In particular I'm looking for the content of the character generator ROM (A19-2708) and of firmware ROMs (A50 to A53-4x2716). So far I had no success in googling them. My goal would be to contribute a good emulation of MDS systems to MESS, especially for what regards the look of the video terminal. Well, this is the plan, when "real-life" is not inteferring too much... *Richard Brewster Main, Esq.* *Of Counsel*Main Cafe invention & patent development Newark, CA 94560 +1 408 409 6246 http://www.maincafe.us/ CONFIDENTIALITY NOTICE: E-mail may contain *attorney-client confidential information* that is legally privileged. Do not read this e-mail if you are not the intended recipient. This e-mail transmission, and any documents, files or previous e-mail messages attached to it may contain confidential information that is legally privileged. If you are not the intended recipient, or a person responsible for delivering it to the intended recipient, you are hereby notified that any disclosure, copying, distribution or use of any of the information contained in or attached to this transmission is STRICTLY PROHIBITED. If you have received this transmission in error, delete it, please immediately notify us by reply e-mail to mainpatents at gmail.com or contacting us by telephone at 408-409-6246

11 years, 2 months

8257 use in Intel MDS IOC

by mainpatents＠gmail.com

Hi Eric, I reverse engineered the Intel IOC in my MDS-225 back in 1980 and designed/programmed the Zendex equivalent. Your project sounds interesting. I just got a MDS-225 in pieces that I'm getting fired up with DD dual 8" floppies and ISIS-II. Got any parts or need any parts? Richard Main Newark, CA USA +1 510-229-9711

11 years, 2 months

Olivetti M24 LAN Interface

by robert.jarratt＠ntlworld.com

I picked up an Olivetti M24 the other day. When I opened it up I found a "Fox Research LAN Interface" dated 1984. I have not been able to find any information on this card. It has a make DE-9 connector with only 3 pins (technically does that make it a DE-3?). Can anyone give me any details of this interface? The machine does not have the expansion board, and it is missing one of the floppy disk drives. It also does not have a hard disk controller. If anyone has any of these bits going spare I would love to hear from you. Thanks Rob

11 years, 2 months

Wanted: ASM-48 for Intellec MDS-2

by mainpatents＠gmail.com

Hi *Dave Mabry,* *I have an Intel MDS-225 that I'm getting up and running. I have quite a bit of experience with these from back in 1980's when I developed a lot of Intel SBC boards and wrote ASM-80 assembler on the MDS. I have a complete double density dual drive Intel disk for it and will be up and running ISIS-II on this soon.* *What parts, software are you looking for? What do you have to sell?* *Richard Main 510-229-9711*

11 years, 2 months

UNIBUS backplane finger contact repair

by jnc＠mercury.lcs.mit.edu

>> it looks like the backplane blocks .. are cast around them > From: Brent Hilpert > all have secured the pin in the housing via some deformation of the metal > pin, post-insertion; as opposed to moulding the housing around the pin. > From: Ethan Dicks > these are cast blocks of plastic with embedded pins. > From: Jon Elson > On some of the connectors, the pins are pressed in from the card side. There appears to be some question as to whether thyy are cast in place, or inserted. Actually, I started to wonder about my assertion shortly after I posted it, and took another look at the backplane. The thing is that the hollows that the finger contact pins are in are fairly complicated (since they allow the contact pins to move back and forth, but hold them from going too far), and I'm really wondering if it would be possible to cast that shape, and then remove the mold, and also have the pin in there. So I'm wondering if in fact they weren't inserted post-casting. > From: Brent Hilpert > The problem in your situation of course, is getting the remainder of > the pin out from between the edge connector housing and the backplane > PCB without having to unsolder the entire connector. Well, I'm kind of assuming they are inserted from the edge-connector side, and not the wira-wrap pin side (what with the contact pins being bent, etc on the edge-connector side), If they _were_ inserted from the wire-wrap pin side, I'm totally @&@^$#%@&^, there's no way to get that PCB off now. So in theory, at least, I'd have to de-solder them from the PCB and then try and push the remaining part back through (after identifying and defeating whatever the capture mechanism is - which I might not be able to reach with the PCB in the way). And then I'd have to find replacement pins and put them in. Both of those sound non-trivial. (All assuming, of course, that they are inserted post-casting, and not cast into place... still not sure about that.) This has assumed a little extra urgency as on closer examination, some of the pins in the UNIBUS in-out area are clearly very weak - I imagine there's only a tiny bit of metal holding the contact pin in place, and it could break off any time. And I won't be so lucky as to have them all be ground pins.. So if one breaks off, the backplane is toast (unless it's the the last thing on the UNIBUS, it could be kludged - i.e. attach the termination/ pull-up directly to the wire-wrap pin). Which I guess is not the end of the world - DD11's aren't _that_ rare... Noel

11 years, 2 months

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