test-drb November 2000

test-drb@ccmp.vtda.org

197 participants
507 discussions

Old computer book found (fascinating reading/photos):Design of Real Time Computer Systems (J.Martin 1967)

by claudew＠sprint.ca

Hi Just taught I would let you know I am reading this : Design of Real Time Computer Systems (1967 J.Martin)found in a thrift store for $2 and it fascinating - at least for me... Just facinated by the photos and the concepts in there...I was 3 at that time (1967) never used computers before I was about 15-16 (model III I am still hunting for one...) Will just have to scan some of these photos for my vintage computer collection web site. I don't have machines from that era but some of these pics are just great!!! Since I have so much space left in my basement (already use 2/3 - I love my wife...) I seem to have now made the very reasonnable decision to extended my vintage computer collection to old books, magazines and manuals...I might have develloped some kind of mental illeness now, I recently mentionned "need more space for computer collection" as a reason to my wife to justify getting a larger house... Claude

24 years, 2 months

RX02 drive emulation (was RE: Lisa Profile Drive emulation on a PC)

by ajp166＠bellatlantic.net

From: Clint Wolff (VAX collector) <vaxman(a)uswest.net> >I'm looking for a way to access a RX0? drive from a PC! I'd like to >archive all the 8" floppies that came with my '780 (including some >CPM/68K distributions) for long-term preservation. RX01 is SSSD and most pc controllers are problematic with that mostly due to cost cutting. Mest best would be a machine with wd36c65 based chip (with both clocks available) as it can do all rates. You will have to create you own driver for the SSSD. I do it all the time with my CP/M crate (native 8" SSSD support). The varios other 8" formats that did get used may require a WD1771/and/or/WD1793 based controller (very non PC) to read the possible and sometimes oddball formats used. RX02 is a truly unique format and only RX02 (or the few clones) actually can read that (you must have a PDP-8, PDP-11 or VAX in other words) as most are Omnibus, Unibus or Qbus. >Anybody done anything like this? I'm still looking for the pinout >of the 10? pin ribbon cable that comes out of the dual floppy box. 10???? more like 40 for either rx02 or rx01. Allison

24 years, 2 months

Analog vs Digital devices, was Magnetics

by dcoward＠pressstart.com

Two analog computer theads at once. COOOL! Don said: > And rather smaller and lighter than the Navy's Mark 1A (analog) fire > control computer which did a rather precise job of laying 2000# 16" > - - and smaller - projectiles to the desired location. For those that are saying "What's a Mk.1?" - my Ford Instrument page: http://www.best.com/~dcoward/analog/fordsperry.htm For more information - The Mark 1 Fire Control Computer: http://www.warships1.com/W-Tech/tech-056.htm --Doug =================================================== Doug Coward dcoward(a)pressstart.com (work) Sr Software Engineer mranalog(a)home.com (home) Press Start Inc. http://www.pressstart.com Sunnyvale,CA Visit the new Analog Computer Museum and History Center at http://www.best.com/~dcoward/analog ===================================================

24 years, 2 months

Old tandy 1000 keyboard 8 pin din pinout?

by dhquebbeman＠theestopinalgroup.com

> >I am restoring a TRS80 model 2000 (1983), one of the rare machines to > >use an actual 80186 Intel CPU. > > An 80_1_86? Really. I guess I was never aware that there was one like > that ever made. I always thought they jumped from the 8086 to the 80286 CPU. > > Do you have any stats on this little baby? Same as the 8086/8086 except: slight difference in PUSHF & POPF has ENTER and LEAVE instructions Anyone else remember anything else? -dq

24 years, 2 months

Old tandy 1000 keyboard 8 pin din pinout?

by ajp166＠bellatlantic.net

From: Claude <claudew(a)sprint.ca> >I am restoring a TRS80 model 2000 (1983), one of the rare machines to >use an actual 80186 Intel CPU. Correction and nit, RARE PCs to use 80186. They were widely used for other non PC systems. It was a 8086 with onchip clock gen, memory selects and DMA. Excellent for embeeded uses that were formally 808x, 8224a, 8288. Allison

24 years, 2 months

Lisa Profile Drive emulation on a PC

by ajp166＠bellatlantic.net

From: Phil Budne <phil(a)ultimate.com> >I've always wanted to do the same sort of thing for RX02's; fool my >RXV211 into thinking a PC at the other end of the ribbon cable is a >pair of RX02's. It seems feasible using just a parallel port; >despite the width of the ribbon cable, it doesn't carry many signals. Why must it be a parallel port? a M8250 serial would work too though a new "RX" driver to talk to it would be needed. Also the RX01 controller is serial not parallel so that could be used in a different way. In the end any IO can be used if you create a driver to fake a known device. Allison

24 years, 2 months

Tandy 1000 EX

by ncherry＠home.net

All this talk of the Tandy 1000/2000 reminds me; does anyone have a boot disk for this beast? Also what are the internals drives, DS 40 Track or 96? I intend on putting the DOS in ROM (flash) so I can use it as a terminal at the very least. I may also build a LAN interface with an NE2000 clone. Of course this means upgrading to a new DOS but I think I can get freedos working on it. -- Linux Home Automation Neil Cherry ncherry(a)home.net http://members.home.net/ncherry (Text only) http://meltingpot.fortunecity.com/lightsey/52 (Graphics) http://linuxha.sourceforge.net/ (SourceForge)

24 years, 2 months

Pal and NTSC

by lgwalker＠look.ca

I have an old famicon game system that is PAL-compliant. Other than a PAL/NTSC converter or PAL TV is there any way of hooking this up. ? I do have a kaleidoscopic collection of monitors as well as several VCR tape decks and a JDH Videomate external VGA/TV adapter which allows me to use my NEC multisync as an all- purpose viewer. It has an H-Phase pot whose response on the monitor is a shift to the side of the display and otherwise not causing any picture distortion. I recall on my Atari there were programs that shifted from 60mhz to 50mhz and allowed you to play PAL formatted games, but in this case there is no computer intervention with the JDH. It is a straight-thru switch. I don't consider this OT since the PAL/NTSC is a problem for all collectors who are internationally-connected in this media. ciao larry Reply to: lgwalker(a)look.ca

24 years, 2 months

"Basics of Analog Computers" book

by r.stek＠snet.net

During the recent flame war, I was reminded that I have a hardcover book, "Basics of Analog Computers" by T. D. Truit and A.E. Rogers, 1960, Rider Publishers, in exeptional condition with dust cover. Although it would go for hundreds of dollars on eBay (I wish!) I thought I would offer it here in hopes of ingratiating myself to some fellow list member for a favor as yet to be determined. (BTW, there is a punched card in it used as a bookmark that would fetch $10-$20 alone on eBay <g>). So, here's the deal - I will send the book for shipping costs to the best 37-words-or-less reason for why you want / deserve / would-kill-for this classic, antique, vintage, pre-Altair, pre-S-100, pre-Intel, pre-historic tome on analog computers, beautifully illustrated (seriously) with pen-and-ink drawings on about every other page. Submit your entries to the list by midnight November 10, 2000. Decision of the judge is final. All entries become the property of everyone else. Contestants must be 18 months or older. Offer not valid in Minot, N.D. or to relatives or employees therein. Allow 8 weeks for delivery. Notary sojac. Bob Stek Saver of Lost Sols

24 years, 2 months

Tandy 1000 EX

by dhquebbeman＠theestopinalgroup.com

> All this talk of the Tandy 1000/2000 reminds me; does anyone > have a boot disk for this beast? I have two sets of MS-DOS & MS-BASIC for the T2000. Currently, I don't have time to set up the machine to do any duplication, but maybe around Christmas (setting up means finding space to put it, etc). Claude needs a set of copies; if anyone other than Neil needs them, drop me a line and I'll see what I can do as winter sets in. -dq

24 years, 2 months

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test-drb November 2000