test-drb April 2007

test-drb@ccmp.vtda.org

257 participants
560 discussions

UNIX PCs was Re: Dreaming of a lean installation method [was Re: *nix on

by jam＠magic.com

> I have a feeling this thread has existed already, but > searching the archives rendered no hits. What should > be considered the first UNIX PC? Now there is some > form of UNIX available for just about everything (even > vintage ports), but what computer was made run UNIX > from the getgo? And please let's not get into > exhaustive definitions of UNIX, although frankly that > might add delightfully to the conversation. I did much of the port of V7 UNIX for the Fortune Systems 32:16 computer in 1981. It was a 6 MHz 68000 (not 68010!) designed specifically to run the UNIX operating system with business applications on top of it. It could run with 256KB of memory and two floppies (although it was really a lot more useful with a 5MB hard drive). That was the sole operating system intended for it. The 68000 did not have proper instruction restart after taking a trap, so we had to do some tricks to support traps due to stack growth. It had a real (and simple) MMU that supported text, data/bss, stack, and u_page, all built using MSI TTL and maybe a PAL -- no LSI MMU. The box was still rock solid when I last had it powered on, probably about 10 years ago. Mine is maxed out with 1MB of memory and four 68MB disk drives (if I am recalling the max supported disk size correctly). James Markevitch

17 years, 3 months

Dreaming of a lean installation method [was Re: *nix on

by ajp166＠bellatlantic.net

> >Subject: Re: Dreaming of a lean installation method [was Re: *nix on > From: Dave McGuire <mcguire at neurotica.com> > Date: Wed, 11 Apr 2007 17:25:54 -0400 > To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org> > >On Apr 11, 2007, at 1:45 PM, Angel Martin Alganza wrote: >> What about smallX (formerly tinyX)? Has somebody used/looked at >> it/made an opinion of it? What about of Microwindows? W? MGR? > > Wow, MGR, I haven't heard of that in a while. I ran it for a bit >on an AT&T 3B1 back in the 80's. It was tiny and very fast! > > -Dave Me I prefer anything small and MC (midnite commander) as a UI on 'nix. and Norton Commander for dos. Then again I do a very custom W98se using 98lite for the same reason. Lighter is better. I'd love to find a 'nix (other than 2.x or V5/6/7) for the PDP-11 that has a small core and networking. Allison

17 years, 3 months

Help needed: DEC Micorvax II printing

by tony＠elmswick.co.uk

I have just seen your message. Are you still having problems printing from your Microvax 2, if so how have you got your printer set up. Are you trying to print directly to the printer or have you set up a print queue. Regards Tony Brooke

17 years, 3 months

m68k Mirage system

by julesrichardsonuk＠yahoo.co.uk

Does this mean anything to anyone? It rings a few distant bells with me, but I can't for the life of me think what system it is (and google's littered with hits for software called mirage that runs on m68k ports of *nix-a-like OSes, so I'm having trouble filtering out the irrelevance :) We've just been offered one, but missing its disk controller, so it sounds like a no-go* - but I'm curious as to what it actually is. * Oh for infinite storage, where we could park incomplete systems in the hope that the missing bits turned up one day! :-) cheers Jules

17 years, 3 months

Dec Alpha 6000/?

by marvin＠west.net

Hi everyone, I saw a DEC alpha something or other at the UCSB central stores yesterday, but have no interest in it. Many of these machines are stripped of HDs and memory, but I didn't check it out except that I did see memory chips installed. I would guess that it would sell for about $25.00 or less.

17 years, 3 months

MCM66128L20

by michaelryan＠mindspring.com

>> I am looking for information about this part; I have something of a >> mystery on my hands. > >> At issue is a 512K IBM memory card that is part of the PC/XT 370 >> option (from 1984). >> The card I have has 18 stacked chips comprising 512K of RAM; the top >> chip of one of the pairs was broken off. (Tony Duell): >That's the first thing that puzzles me. It was my understanding that >these were 128Kbit chips, so 18 of them would give you 256K bytes (+ >parity) of memory. Can you confirm, please, that 18 of them really are 512K >> The top chips are stamped MCM66128L20; the bottom chips have no part number. My mistake; I should have said there are two rows of 18 chips, 36 in all, comprising 512K. You can see pictures at:- www.xt370.net Thanks for the suggestion -- removing both the old lower chip and the new upper chip and trying one of the new chips, on the assumption that the each of the new single-DIP parts replaces one of the old piggyback pairs, is the next logical step. But the board is so rare that I don't have the courage to rework it experimentally; it has run 96 hours of memory / system board tests without failure, and so for now I guess I will leave well enough alone. I suspect, as you do, that the bottom, unmarked part has a different select line; the chips are certainly soldered pin-to-pin. The lack of a part number on the bottom chip suggests the stacked pair was sold as a single part number (and the part number suggests a 128K DRAM); the fact that the new chips have the same part number and no piggybacked partner suggests that entire 128K eventually moved inside one DIP. The Motorola books I have access to from back in the day don't list this part. I guess, based on the munitions docs I had to sign, that it was mil-spec. Thanks, Mike

17 years, 3 months

GNT 4604 7102 3600 + Paper Tape supplies

by martin.griffiths＠gnt.co.uk

Hi Guys, Noticed some you talking about GNT paper tape readers and punches. 4600 4400 3600 7102 etc These are still manufactured in the UK for Worldwide use. Spares and repairs are also available. 1" wide industry standard paper tape rolls (and 5/8") are also available in limited colours. See our website at www.gnt.co.uk for contact details. Regards, Martin Griffiths GNT Limited W: www.gnt.co.uk <BLOCKED::BLOCKED::http://www.gnt.co.uk/> E: martin.griffiths at gnt.co.uk <BLOCKED::BLOCKED::mailto:martin.griffiths at gnt.co.uk> T: 01384 236007 F: 01384 236929 M: 07921 222972 The information contained in this message (including any attachments) is confidential and may be legally privileged. If you are not the intended recipient, please notify the sender by reply email and then delete it from your system immediately - any disclosure, copying or distribution of the message or any action taken or omitted to be taken in reliance upon it is prohibited and may be unlawful and GNT Limited accepts no liability whatsoever for the accuracy of its content. Any opinions expressed in the message are entirely those of the author and do not necessarily reflect the opinions of GNT Limited. Please note that this e-mail and any attachments have not been encrypted. They may therefore be liable to be compromised. Please also note that it is your responsibility to scan this e-mail and any attachments for viruses. Viruses and compromises of security are inherent risks in relation to e-mail. We do not, to the extent of permitted by law, accept any liability (whether in contract, negligence or otherwise) for any virus infection and/or external compromise of security and/or confidentiality in relation to transmissions sent by e-mail. Scanned by MailDefender - managed email security from intY - www.maildefender.net

17 years, 3 months

Mystery re: MCM66128L20

by michaelryan＠mindspring.com

I am looking for information about this part; I have something of a mystery on my hands. At issue is a 512K IBM memory card that is part of the PC/XT 370 option (from 1984). The card I have has 18 stacked chips comprising 512K of RAM; the top chip of one of the pairs was broken off. The top chips are stamped MCM66128L20; the bottom chips have no part number. I could only find the part through a broker (and I paid $25 for it). I can't find a spec sheet but expected to receive a stacked part (most likely, two 64K chips stacked to make a "128K" chip. When the new chips arrived (after I signed munitions documents), they weren't stacked pairs. That left me to wonder whether the new parts are a later rev that incorporates all the circuits into one package or whether (more troublesome) the bottom chip of the pair is now a complete unmarked mystery. The chips were soldered together, not welded. So . . . I soldered one of the new chips onto the top of the bottom chip. I figured that if that action was a bust, I could still remove the bottom chip and replace both with one of my new ones. Much to my surprise, the board now passes memory diagnostics. Does anyone have a book with a spec sheet on this part number and possibly any insight into what is going on with the (unmarked) bottom one? There are some pictures of the project at:- www.xt370.net including the board and the chips. On the second page (click on 'more restoration photos') you can see the missing top chip. The code on the new chips is 8407BQD. The old chips say BQD8431. Thanks, Michael Ryan

17 years, 3 months

GNT 4604 7102 3600 + Paper Tape supplies

by aek＠bitsavers.org

> 1" wide industry standard paper tape rolls (and 5/8") are also available > in limited colours. Do you know of any sources for fan-fold paper tape instead of rolls?

17 years, 3 months

Emergency Moderation Mode off

by jwest＠classiccmp.org

I'm going to turn off the emergency moderation mode, as the list appears to have settled down. I'm impressed with how things have been going - ontopic and cordial - it is most appreciated. Only a few posts were rejected during moderation time, and one person unsubscribed due to my "heavy-handedness". I'm hoping we can keep up the trend without full-on moderation. Thanks a bunch, and sorry for the slowness the past couple weeks! I'd humbly suggest that before posting - think for a second. It may defuse things in the future! Jay West

17 years, 3 months

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test-drb April 2007