test-drb October 2020

test-drb@ccmp.vtda.org

136 participants
117 discussions

Next project: 11/24. Does it need memory?

by cz＠alembic.crystel.com

Ok, with the PDT and the RX02's out of the way I'm running down to the wire on fixing stuff before I tackle the 8/L's. Next up is the 11/24, this is one of the 5.25 inch rack mounts with a CPU, KT24, and no memory. First question: Will ODT respond at all with no memory on the Unibus? Second question: Can a 128kw memory board from an 11/34 work in an 11/24? Or do I need one of the 11/44 boards to make it go?

4 years, 2 months

Identifying a Mystery ISA Card

by seanellis9＠gmail.com

Hey all, I got this (currently exploded) mystery RAM, RTC, and I/O board out of a dead Sanyo luggable the other night, and once I replace the burned up tantalums I'd like to put it in my 5150 so I can get a full 640k of RAM. Question is, does anyone know what this board is? It's a completely anonymous board with not even an FCC ID to go off of. I'm assuming the RAM is at least strapped right; all the banks are full which should be 384k, and the Sanyo was a 256k machine = 640k. Here's a couple pictures; one's an actual picture of the card and the other is a simplified TULARC/TH99-esque vector of what's on the board. https://i.imgur.com/WhO4cco.jpg https://i.imgur.com/uBCkv5G.png

4 years, 2 months

FIRE SALE!

by aek＠bitsavers.org

http://www.vcfed.org/forum/showthread.php?77118-Fire-sale-PDP-11-stuff

4 years, 2 months

Informix for SCO XENIX

by seanellis9＠gmail.com

Just wanted to let you all know that I've found a copy of Informix 3.11 for SCO XENIX on the Lisa 2... anyone interested?

4 years, 2 months

cctalk Digest, Vol 73, Issue 13

by athornton＠gmail.com

I agree that whether a student learns has much more to do with the student than what in particular they're studying. I quit my undergraduate physics degree when I had a moment of clarity that even if I managed to squeak through my Partial Differential Equations class with a C (I did) I'd still be on a trajectory where _solving PDEs was what I would be doing with my life_. My undergrad degree is in Ancient Mediterranean Civilizations. My MA is in History (but, hey, the History of Computing). I dropped out of the Ph.D. program I was in for a variety of reasons, to be honest crushing depression probably chief among them, but also because I was a fairly decent practitioner, and I had more fun playing with computers than I did writing stories about people who'd played with computers a couple generations before I had. It being the late 90s, my job prospects were decidedly better on the Not A Professional Historian side of the fence. That was 22-ish years ago. I'd been making beer money all through college and grad school with IT jobs, and I've stayed in IT-related fields ever since. Consulting, systems administration and engineering, these days software development-but-also-devops. My lack of appropriate degrees probably only didn't hurt because I started a not-unsuccessful consulting business with my mentor after I quit grad school, and by the time I was ready to move on from that, I had enough years of broadly varied experience under my belt that it didn't really matter. But that's tangential. The actual point was: the fuzzy stuff is only contemptible if you've got Physicists' Disease. History is hard, and it has a lot more in common with debugging that is obvious at first glance. In both cases you are presented with "Here's what happened," and it's your job to figure out "why?" In both cases, the ability to break the end-state down into a set of much smaller components which contribute to it is key--and although that ability probably _does_ have a lot to do with innate personality or preference, it's also very, very much a learned (and trained!) skill. The thing with debugging is that you usually are afforded the opportunity the repeat the experiment while changing parameters. With history, you're not so lucky, and thus you never _really_ know the root causes (you also usually don't know "what really happened", but by cross-referencing your sources you may be able to emerge with some sort of decent-consensus guess), but you can make more or less plausible and persuasive hypotheses about them. The idea that you are interrogating a recalcitrant witness is common to both history (and I would guess many of the humanities and social sciences) and creating and maintaining working software. I'll grant that it's _harder_ to surf blithely through an engineering degree than it is through a liberal arts degree, mostly because there are less-subjective metrics (particularly in lab courses) as to whether you actually learned something about what you're supposed to be doing. If I were being snarky, perish the thought, I'd say that the engineers who didn't really want to understand what they were doing were pre-meds. Nevertheless, a degree--and particularly an advanced one--is indeed much more about the discipline to put your head down and swallow what's put in front of you than about smarts. I was told a couple of decades ago I'd regret not having stuck it out for my Ph.D. I'm still waiting for that regret to kick in; in the meantime, many others have come and gone. Adam

4 years, 2 months

FYI sunhelp.org down

by john＠ziaspace.com

> I posted to <rescue at sunhelp.org> and saw my message got stuck in the mail > queue. Upon a further inspection I saw that the domain has expired along > with `mrbill.net' where the nameservers used to reside and both have been > taken by someone else, taking the name service down for `sunhelp.org'. I > can still reach Bill Bradford's personal page when I connect to the server > by its IPv4 address at: <http://184.94.207.190/>. I noticed this, too. Since sunhelp.org uses mrbill.net DNS servers, and because the server at 184.94.207.190 is still up, we can still see the content if we make our own DNS, so I configured my server at 192.80.49.4 (athena.zia.io) to answer for mrbill.net, for sunhelp.org, for fiftieshouse.com, and for lispmachine.net, so if you want to see any of these, temporarily set your DNS server to 192.80.49.4. I did this in part to mirror sunhelp.org, but I suspect there are already mirrors out there. Sorry to hear about Bill :( John Klos

4 years, 2 months

Searching for (DOS?) Backup Software

by poc＠pocnet.net

Hello, anyone heard of Genoa GenWare Backup Software and probably has a copy floating around? Someone was asking me to restore tapes, and the original diskettes aren't readable anymore. https://worldradiohistory.com/hd2/IDX-Business/Books/Business/IDX/1987-04-O… :wq! PoC PGP-Key: DDD3 4ABF 6413 38DE - https://www.pocnet.net/poc-key.asc

4 years, 2 months

Looking For Computer Automation LSI-3/05 Documentation

by tangentdelta＠protonmail.com

Hello. I have two card cages out of a pair of Linotron 202 phototypesetting machines, and have been hunting for documentation for the Naked Mini systems used in them for over a year now. The Computer Automation CPU boards in the systems have been a complete mystery to me until recently. To make a long story short, I happened to stumble across the patent for the machine (https://patents.google.com/patent/US4254468A/en), which has the same bus configuration as my card cages, and also provides some good evidence that "Naked Milli" 3/05 CPU boards were used. I've found documentation for the LSI 3/05's instruction set and an informative brochure, but nothing technical. Bitsavers has been a great help in my efforts to uncover more information about this processor, but there's still a lot of technical information that has eluded me (such as the autoload ROM, and how its data is arranged). The LSI-series computer handbook mentions a dedicated manual for the LSI 3/05, but I haven't found anything else about it online. If anyone has any information about the LSI 3/05, or where I might look for the manual, it'd be greatly appreciated. Thanks.

4 years, 2 months

Maynard MaynStream

by van.snyder＠sbcglobal.net

I have a Maynard MaynStream tape backup unit from the 1980's. It uses audio-format cassettes with 1/4" tape, but it's a different tape composition, and the cassette has a notch in it to tell the device it's not just plain audio tape. The capacity was 80 MB per cassette. I also have four ISA controller cards, four cables, and several cassettes. We used it for backup with IBM PC/AT boxes many years ago. Does anybody want it? It seems a shame to throw it in the e-waste bin. Van Snyder van.snyder at sbcglobal.net

4 years, 2 months

<Hardware plug> HP1000 A990, A900, & A600 systems, parts, pieces, cable, panels, connectors... etc for sale

by jesse＠cypress-tech.com

I'm getting in a lot of the HP1000 systems and parts in next week. If anyone needs any 1k A990, A900, & A600 systems, CPU, memory & interface cards, cables, panels, connectors or anything else associated with those lines, let me know as I probably have them. Just note that I'm a re-seller and not a hobbyist and am selling these items as part of an end-user consignment deal.. two types of complete HP1000 A990 and A600 are below. Let me know if you need anything, want pictures, or have any questions. A990 Server 14-slot Micro 1000 Server (Configured with) 1 x 12990x A990 CPU 1 x 12221B 8MB Memory 1 x C2490A 2GB SE SCSI Internal disk drive 1 x xxxxx? DDS DAT Internal Tape Drive 1 x 12016A SCSI Controller board 1 x 12009A HP-IB Interface board 1 x 12005A Serial Interface board 1 x 12006A Parallel interface board 1 x 12040A Asynchronous Multiplexer Interface (MUX) board 1 x 02430x Voltage Jumper Board 1 x 12230A Front-plane memory connector (CPU to memory connector) $3,500.00 A600 Server 14-slot Micro 1000 Server (Configured with) 1 x 12105x A600 CPU 1 x 12101B Memory Controller 1 x 12103D 1MB Memory 1 x 12103C 512kb Memory 1 x 12022x disk controller board 1 x xxxxx? floppy drive 1 x C2490A 2GB SE SCSI Internal disk drive 1 x 12016A SCSI Controller board 1 x 12009A HP-IB Interface board 1 x 12005A Serial Interface board 1 x 12040A Asynchronous Multiplexer Interface (MUX) board 2 x 12038x Jumper board 1 x 02430x Voltage Jumper Board $2,500.00 Feel free to email direct at jesse(at)cypress-tech.com Thanks Jesse Cypress Technology Inc

4 years, 2 months

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test-drb October 2020