test-drb March 2004

test-drb@ccmp.vtda.org

273 participants
673 discussions

by David.Kane＠aph.gov.au

CPUs could have emulated guts, either software or one off hardware designs, with replica enclosures and front panels. That feels like it would result in a reasonable result for the effort required, but mechanical I/O will be the tough bit. I have recently mulled over the idea of constructing a PDP-11/04 replica; I imaged a bent metal case, a replica programmer's front panel, and an internal PC mother board running SIMH would be feasible, but I have shuddered at the thought of trying to interface it to 8" floppy drives (if I could find any), or building a card reader and line printer. BTW: What is the origin of this message? I cannot find it in my mail archive. David -----Original Message----- From: cctalk-bounces(a)classiccmp.org [mailto:cctalk-bounces@classiccmp.org] On Behalf Of ben franchuk Sent: Thursday, 25 March 2004 12:45 PM To: On-Topic and Off-Topic Posts Subject: Computer Replica's <SNIP> So lets have your vote for what replica's of old computers that need to reconstructed at a functional level -- blinking lights, mechanical I/O but it need not be the same hardware level. <SNIP>

21 years, 5 months

Computer Replicas's

by aek＠spies.com

So lets have your vote for what replica's of old computers that need to reconstructed at a functional level -- blinking lights, mechanical I/O but it need not be the same hardware level. -- I'm biased towards machines that no longer exist, but have surviving software: SDS 940 BCC 500 A Xerox Alto using modern components would be interesting as well. It would easily fit into a medium sized FPGA now.

21 years, 5 months

Paging David Brownlee (Re: 16MB sparc10 DIMMs)

by mouse＠Rodents.Montreal.QC.CA

David Brownlee <abs(a)absd.org>, do you have any other address I might try writing to? Mail to you at that address fails after five days "451 Could not complete sender verify callout", apparently because the verify code was too impatient and tried to send something before getting the greeting banner. /~\ The ASCII der Mouse \ / Ribbon Campaign X Against HTML mouse(a)rodents.montreal.qc.ca / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B

21 years, 5 months

Electronic components sources

by melamy＠earthlink.net

actually, the usual switches these days on PC computers are only logic switches back to the power supply. The power supply does "tap into" the ac line to get a little power it needs. My P4 that I built last year uses an ANTEC case and there is no AC going out to a front panel switch - it is only a push button. A good rule of thumb is that if a switch clicks then it probably has AC on it. If it doesn't then it MIGHT be only low voltage. As an electrical engineer, I would not take the chance and assume it is low voltage without checking. Any computer that is pre-ATX will have AC voltage on the power switch. Some early ATX and maybe even now (I don't know for sure) may still have a real switch out front. The older mini-tower systems that have a power switch out front usually had a AC connector on the back of the power supply and a four conductor cable that ran out to the power switch. The power could tap into the AC line without affecting the switch out front. The older NEC, etc systems sometimes had a seperate power suply with an AC connector and cables, etc that were not integrated into the power supply like the PC, AT, ATX supplies that came along. best regards, Steve Thatcher >--- Original Message --- >From: meltie <lists(a)microvax.org> >To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk(a)classiccmp.org> >Date: 3/24/04 7:23:31 PM > On Wednesday 24 March 2004 23:45, William Donzelli wrote: >> > Assuming the switch functions correctly (and is wired correctly), >> > the behaviour of a device with such a switch in the off position >> > is pretty certain: it's identical to a device that has the >> > mains lead pulled out. >> >> Not completely. The cord, all the way to the switch, is still energized. >> And remember, many of today's devices are not always completely off - >> they might tap into the line just a little bit (clock, for instance). > >How is this different from a circuit that doesn't chop both conductors? > >alex/melt >

21 years, 5 months

IBM PC/XT Clone and 1.44MB FDD

by hassan＠SyberDesk.com

Hi, I've got a generic PC/XT 8088 clone (contains NEC processor) with no HDD and two 5.25" FDD. Needless to say that the media as well as the O/S (M$ DOS) is not available in my local market. I was wondering if it's possible to: (1) Install a 3.5" 1.44MB FDD in it. (2) Acquire FREEDOS and boot the machine (3) Use some sort of DOS terminal program to connect to a Linux machine Appreciate any help and guidance. Thanks. Hassan

21 years, 5 months

1/2 tapes (someone asked)

by jwest＠classiccmp.org

A while back someone asked about getting blank 1/2 tapes. Here's a great contact.... Magnetic Products & Services, Inc. Kristine Hunter khunter(a)mpsinc.org www.mpsinc.org I was quite happy with my purchase from them of blank 1/2 tape media. Jay

21 years, 5 months

More on my flickering DEC monitor

by witchy＠binarydinosaurs.co.uk

Hi folks, I think I posted this on here first but I'm not sure :) Anyway, (slight OT drift here) my '97 vintage 21" PCXAV monitor (the one with the paper-white case & trinitron screen) has decided to start flickering and dimming itself. Lee's already given me a couple of pointers but I thought I'd ask here too in case he's not about. I've got the PSU here and there's a couple of things on there that make me worried: http://www.wowrarelook.co.uk/resistors.jpg http://www.wowrarelook.co.uk/burnt.jpg http://www.wowrarelook.co.uk/solder.jpg http://www.wowrarelook.co.uk/solderside.jpg The middle 2 are the front and back of the same components on the board. Should I be worried that so much solder is escaping/has escaped from the joints? Also the soldering in 'solder.jpg' looks decidedly iffy. I haven't checked the resistors yet to see if they've failed.....is it normal for them to get so hot they burn the board? Probably more pix to come when I get the logic board out :oD cheers -- Adrian/Witchy Owner & Webmaster, Binary Dinosaurs www.binarydinosaurs.co.uk - possibly the UK's biggest online computer museum www.snakebiteandblack.co.uk - ex-monthly gothic shenanigans :o(

21 years, 5 months

Fw: pdp 11

by jwest＠classiccmp.org

If anyone can help him, please contact the original poster. Jay ----- Original Message ----- From: "Rice Billy" <Brice(a)ambac.net> To: <jwest(a)classiccmp.org> Sent: Wednesday, March 24, 2004 11:06 AM Subject: pdp 11 > My company uses an Adcole cam inspection system that uses a PDP 11 operating system. > We need our master disks which are 8", copied. We have a new box of disks. Do you know of anyone who has the capability and would do this for us. > > Billy Rice > Maintenance & Facilities Manager > Ambac International > (803)-462-9601 > > --- [This E-mail scanned for viruses by Declude Virus]

21 years, 5 months

Bloody newbies

by cb＠mythtech.net

>probably at the expense of the multiples of >classics I've got! Before you junk the Classics, open them and pull the RAM card if it is present. They are getting harder to find and you should be able to sell them. -chris <http://www.mythtech.net>

21 years, 5 months

KA620

by msokolov＠ivan.Harhan.ORG

ben franchuk <bfranchuk(a)jetnet.ab.ca> wrote: > I favor a simple techological base for MARS > since I could not be independant with having to rely on some EARTH > patent or custom chip Patent?!?! We won't honor no fucking patents! I'm the reincarnated Karl Marx! My new VAX will be completely open source hardware: I'll open-source the Verilog code. There will be no problem with fabbing it right there on Mars. > BTW Travel to MARS is keeping me from claming my 3.125 square miles > of land. I'm sorry to inform you, but your title to that land is invalid. The same goes for everyone selling and buying land on Moon and Mars. That land belongs to the Galactic Federation. The Federation will give that land for free to any refugees from Earth fleeing from capitalism and seeking to live a completely egalitarian society without money or property, but if you start claiming property, we won't respect your claims any more than we respected the feudal landlords of czarist Russia we overthrew in 1917. MS

21 years, 5 months

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test-drb March 2004