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101090 discussions

by drlegendre＠gmail.com

Folks, A neglected Apple IIe showed up in my life, and now I find myself needing a few parts. Specifically: - AY-5-3600 keyboard encoder IC - Several key studs, maybe a couple of keys Anyone have a donor machine? Bill

7 years, 10 months

Reminder: VCF Pacific Northwest 2019 - We need you!

by mbbrutman＠brutman.com

The short story: we need exhibitors, speakers and volunteers to have an event. We are off to a good start but we all know time flies when you are having fun, and March isn't that far away. When: Saturday and Sunday, March 23rd-24th 2019 Where: Seattle, WA at Living Computers:museum+labs Event page: http://vcfed.org/vcf-pnw Pictures from 2018: https://photos.app.goo.gl/QPfZ4WXPdIdUo5gn2 Exhibitor registration: http://vcfed.org/wp/vcf-pnw-exhibitor-registration/ Have a question? Nervous about being a first time exhibitor? Want to help but don't know how? Send me an email ... I'd be happy to talk to you. -Mike mbbrutman at brutman.com or michael at vcfed.org

7 years, 10 months

Old Univac Tape and Printer Maintenance Manuals

by t.gardner＠computer.org

Hi: I'm looking for maintenance manuals for old Univac tape and printers. I've already mined Bitsavers and done some fairly extensive Google searches but would like manuals on: Tapes: Uniservo IIA, IIIA or IIIC, VIC, VIIIC, 12, 16 or 20 Printers: 0751, 0755 (used on 1108), 0758 (used on 1108 and 494), 0768 (used on 92/9300) or 0770 series (used on 1100) Pointers to on line versions would be appreciated. If you have hardcopies I'll be happy to buy them and give back a scan, or pay for the scan. Tom

7 years, 10 months

Altos 386/1000 boot/diags images?

by gordon+cctalk＠drogon.net

Long shot, but you never know... I recently obtained an Altos 386/1000 system (80386 + 4GB RAM in a tower case with tape drive and floppy) After a quick clean and check it powered up, gave a whinge about a flat battery (which I'm told is to be expected), and then booted SysV r3 Unix OK. After an hour or so poking about, I shut it down then powered it up again a short time later... Now, it starts up, does the power on checks (including the battery whinge), loads Unix, prints some information about memory and a 16 user license then stops. No more messages, no keyboard input, nothing. So I'm a bit stuck. I've found some manuals online but they're not really helping - I'll take it to bits later and see if I can read the internal SCSI drive on another system but I'm not convinced there is an issue with the drive though. So wondering if anyone knows of any installation (or diagnostic) images for these machines? It has a SCSI tape drive and I have some tapes for it, so with some SCSI shenanigans I'm fairly sure I can write a boot tape on a Linux system, or maybe even the floppy - but I need the images... Any clues? Thanks, Gordon

7 years, 10 months

DG/UX install media

by alan＠alanlee.org

Does anyone have install media for DG/UX targeted for M88100 CPUs (specifically Aviion)? Any version Thanks, -Alan

7 years, 10 months

VT320 Fonts

by kylevowen＠gmail.com

Does anyone know of any more downloadable VT320 fonts and glyphs? This is about all I could find at the moment. https://vt100.net/dec/vt320/fonts Trying to find some Cyrillic fonts so that Tetris looks right. I suppose I can try to write my own, but that would take a good bit of effort to get it looking right. Also, is there a way to dump the existing font on a VT320 in the DRCS format? Thanks, Kyle

7 years, 10 months

Digico computer

by cc＠informatik.uni-stuttgart.de

On Wed, 10 Oct 2018, it was written > Did you contact the guy with the drawings? Yes but I haven't heard back from him, yet. At least the mail hasn't bounced. Does anyone know the person who runs vintage-icl-computers.com ? There is no name, address or anything there, and I wonder if the site is still alive. Christian

7 years, 10 months

WTB: BPK-72 or Bubble Memory Dummy Module + Seed Module

by saburwulf＠gmail.com

Currently working on restoring some bubble memories and I'm looking for some modules originally included in Intel's BPK-72 development kit, specifically the Dummy Load module and the Seed module. http://archive.computerhistory.org/resources/still-image/Intel/intel.dummy_… These are used for testing a bubble memory system as well as repairing bubble modules which have had some sort of failure which requires manually re-seeding them. I have all the parts I need to work with the modules, I'm just missing these parts. The manual shows the schematics, component values, and layouts of both of these modules, so I can fabricate them myself if need be, but wanted to see if anyone had them handy first. Thank you again! Josh

7 years, 10 months

Anyone know where uPD2167 SRAMs appeared?

by ethan.dicks＠gmail.com

Hi, All, I asked a version of this question earlier this year. I have not been able to find any vintage machines that used these 16Kx1 55ns SRAMs. Anyone recognize them? Lots of them for sale on eBay. Probably few buyers. One would want to know which systems used them, thus my question. They probably would have been excellent in a DEC MOS memory board but I have no evidence they were used thusly. Contemporary DRAMs were cheap and 64Kx1 so that's what was in consumer gear. Anyone? Fast SRAM? Anywhere? There's little point in wiring 8 of them up into a byte vs using a 62256 except for speed. 55ns is faster than any 8MHz machine really needs (100ns-150ns was typical for those depending on bus architecture). I could see these being cache RAM for a minicomputer vs primary RAM. -ethan

7 years, 10 months

Digico computer

by rodsmallwood52＠btinternet.com

The core memory could still have data in it.... Rod Sent from Mail for Windows 10 From: Rod G8DGR via cctalk Sent: 10 October 2018 09:28 To: Christian Corti; General Discussion: On-Topic and Off-Topic Posts Subject: RE: Digico computer That looks similar to the Logo of the company I worked for ICS (Instrumental Colour Systems) The machine is identical down to the colour and the tape reader. Did you contact the guy with the drawings? Rod Sent from Mail for Windows 10 From: Christian Corti via cctalk Sent: 08 October 2018 15:25 To: General Discussion: On-Topic and Off-Topic Posts Subject: RE: Digico computer On Sat, 6 Oct 2018, Christian Corti wrote: > I can make some pictures these days. So, here they are: http://computermuseum.informatik.uni-stuttgart.de/pics/digico Some notes from my part: There were two systems, there is only the front panel and board set left >from the second one. One front panel says "LOS", the other "micro 16v". Also pictures from the Pertec drive wreck that I hope can be restored to a fixed platter only drive. (PCBs not shown, but I have them) I have three memory boards in total, and the two CPU boards are different revisions. The one shown is MK2, the other is MK1 with a lot of green wires. All boards seem to be soldered by hand! Christian

7 years, 10 months

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