test-drb

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101090 discussions

by mooreericnyc＠gmail.com

Hello, I am looking for any of the following items. I have terminals and assorted qbus and S100 cards for trade, or am happy to discuss payment :). 1) Qbus scsi card 2) Emulex TC01 3) QBUS bus probe 4) SD2SCSI 5) Teletype DRPE or ARPE (already have a BRPE) paper tape punches 6) AED/tektronix/SGI/etc... graphics terminal 7) Unfomatted pertec controller (any bus) 8) S100 jade bus probe, system monitor board, or similar 9) Anything fabri-tek, Gould, or SEL 10) blinkenlights and flippenpaddles computers, any interesting front panels, etc... 11) ESDI disk emulator Thank you! -Eric

5 years

WANTED: IBM 360 operators panel

by hills.barry＠gmail.com

I am looking for an IBM 360 operator panel. Model 55 would be wonderful but I would consider any 360/370. To be used for demo so condition of switches & lights is important.

5 years

DEC PDP-8/e H212 core mat repair

by rsmilward＠frontier.com

Going by the size, I'd say the Keronix board is for a Data General Nova or one of its ilk. Keronix did make core boards with p/n starting 816 for Novas. **Richard Message: 1 Date: Mon, 19 Jul 2021 16:50:10 -0500 From: Jules Richardson<jules.richardson99 at gmail.com> To:cctalk at classiccmp.org Subject: Re: DEC PDP-8/e H212 core mat repair Message-ID:<769e6168-9024-fa20-5b9c-ed1cb91ec641 at gmail.com> Content-Type: text/plain; charset=iso-8859-15; format=flowed On 7/19/21 3:40 AM, Joshua Rice via cctalk wrote: > I believe much of the core manufacturing for DEC minicomputers was > outsourced, but a lot of it had become much more automated by the late 60's > and early 70's. I've got a trio of planes here, two of which are from a Lockheed MAC-16, but the other one is made by Keronix out of Santa Monica for an unknown machine (dated 1973, model number "P4" and p/n 816335 if that means anything to anyone, approx 16"x16" with two 100-pin, double-sided finger edge connectors on 0.1" spacing). Anyhoo, the Keronix one has a sticker on it saying it was repaired by DMA, inc. in Amery, WI in 1980 - which might suggest that there were third parties around working on boards, rather than them having to go back to the manufacturer for repair. (I have no idea what the nature of the repair was, of course; maybe it was to surrounding logic rather than the mat itself). > It's worth noting that most computer manufacturers appreciated the > fragility of core memory planes at the time, with most of them being > protected with either PCB's or perspex/plastic shields on top of the core > planes. Yes, that's how all the ones I've ever seen have been. The Keronix one has an additional shield over the top of the entire PCB, on top of the one protecting the cores. Jules

5 years

VT101 parts available, found on Reddit

by rice43＠btinternet.com

Someone on Reddit has found much of a VT101 and would like to rehome it. Not sure where he's located, but somewhere in US Thread is here: https://www.reddit.com/r/vintagecomputing/comments/ogy6im/so_i_found_a_vt10…

5 years

Tektronix 8002 microprocessor lab software

by jules.richardson99＠gmail.com

Just out of interest, is the software for the Tektronix 8002 microprocessor lab archived out there anywhere? What I believe is one popped up on one of my Facebook groups, and it'd be a trek to get it even if I can arrange a good price with the current owner - but it sounds like the software at the site, if it still exists, is unlikely to surface from a huge pile of detritus, so that automatically puts things right in boat anchor territory. There may or may not be a terminal, too; I get the impression those were optional (I've been told that there are two Tek terminals, I just don't know if they're the right models for this system). cheers Jules

5 years

DEC PDP-8/e H212 core mat repair

by ccth6600＠gmail.com

I am curious if anyone has attempted to repair (replace) a broken wire in a PDP-8/e H212 (MM8EJ) core mat (8 k word). The cores are not visible without a microscope. I cannot imagine how these were even manufactured and wonder if DEC service centers repaired core mat faults or if faulty boards were simply discarded. CDC 6600 cores were huge in comparison and I would not hesitate to replace a broken core wire on those. Best regards Tom Hunter

5 years

DEC PDP-8/e H212 core mat repair

by rice43＠btinternet.com

------ Original Message ------ From: "Tom Hunter via cctalk" <cctalk at classiccmp.org> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Sent: Monday, 19 Jul, 2021 At 06:33 Subject: DEC PDP-8/e H212 core mat repair I am curious if anyone has attempted to repair (replace) a broken wire in a PDP-8/e H212 (MM8EJ) core mat (8 k word). The cores are not visible without a microscope. I cannot imagine how these were even manufactured and wonder if DEC service centers repaired core mat faults or if faulty boards were simply discarded. CDC 6600 cores were huge in comparison and I would not hesitate to replace a broken core wire on those. Best regards Tom Hunter These patents might be enlightening. I'm sure there's others, but these are some i've found on a quick search. https://patents.google.com/patent/US4161037A <https://patents.google.com/patent/US4161037A> https://patents.google.com/patent/US3668664 <https://patents.google.com/patent/US3668664> Josh

5 years

HP 2100A Restoration

by johnr＠grebnesor.com

Hello, I came across a web article in which you discussed restoring an HP2100A. I spent many years working on this computer and have the front panel. I am doing some work on it to produce a display for fun. I am replacing the incandescent globes with LEDs and using a Raspberry Pi to control them. The question I have is, do you know an easy way to remove and insert globes in the front panel switches please? I am based in Melbourne, Australia. Many thanks John _____________________________________________________ Professor John Rosenberg E: johnr at grebnesor.com M: +61 418 253001

5 years

VaxBrick (vax 4000-50, KA600 ) Owners manual/technical manual

by kiwi_jonathan＠yahoo.com

Doe anyone have an "owners manual" or technical manual for the KA600 aka VaxBrick aka Vax 4000-50? I have most of a Vaxbrick, but I'd sooner run Unix on it that VMS. But I know of no open-source OS which supports the KA600. I'd guess most of the internal devices are similar to SCSI or DSSI on high-end Microvaxes/vaxstations; but that's a guess. There's a listing on eBay for a lot which includes vaxbricks. I've made an offer on it, but let the offer expire after finding no open-source drivers. I'm willing to front purchase of the lot, if others are interested in buying a VaxBrick in a BA213 or BA 215. -Jonathan Stone

5 years

RP/M2 by Micro Methods Inc

by cctalk＠ibm51xx.net

>I found a copy of RP/M2 for the IBM PC by Micro >Methods Inc. with manual >and some floppies, 8" and 5.25".? According to the >manual, this was a >CP/M compatible operating system.??David,Did you see the article on page 94:http://www.bitsavers.org/magazines/Micro_Cornucopia/Micro_Cornucopia_%23…

5 years

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