test-drb June 2002

test-drb@ccmp.vtda.org

205 participants
502 discussions

Sharp PC-5000 (early laptop circa 1983) for sale

by foo＠siconic.com

I'm selling a Sharp PC-5000 that is new in the box. The Sharp PC-5000 was one of the first clam-shell portables circa 1983 (the GRiD Compass and the Gavilan were it's contemporaries, as well as another one from Australia, called the DuMont or something). This is an awesome piece for any collection, especially those who collect portables and early laptops. They don't get earlier than this, and certainly not new, in the box. Pictures: The computer http://siconic.com/crap/sharp5000.jpg The box http://siconic.com/crap/sharp_box.jpg The manual http://siconic.com/crap/Sharp_us_g.jpg You also get a bubble memory module (sealed, new) http://siconic.com/crap/Sharp_Bm_box.jpg Best offer over $250 by Friday (June 17th) takes it. If there are no takers here, it goes to online auction. I accept PayPal preferably, check or money order will suffice if sent promptly. You, of course, pay all shipping charges. Please reply to <sellam(a)vintage.org> Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

22 years, 1 month

Update on finds

by llstelck＠cox.net

I am looking for a Gulton TR-711 Single Channel recorder. Do you know where I can find one? Larry

22 years, 1 month

RF output DOES NOT equal Composite!!!

by acme_ent＠bellsouth.net

> > Cable and Timex are the same for channels 2 through 13 (It's called > > "VHS"). Connect the Timex and tune the TV or VCR to channel 2 or 3. > > VHS? Over here, VHS (Video Home System, I believe) is a popular format > for domestic video tapes, and is nothing to do with RF interfaces. > > -tony A typo, no doubt he means VHF. Glen 0/0

22 years, 1 month

RF output DOES NOT equal Composite!!!!

by acme_ent＠bellsouth.net

> From: Fred Cisin (XenoSoft) <cisin(a)xenosoft.com> > On Sun, 16 Jun 2002, Glen Goodwin wrote: > > No, but he could tap the composite signal off of the Timex pcb a feed a > > composite monitor with it. > > I think that somebody who doesn't know the difference between RF and > composite, should learn that FIRST. Granted, but the difference was well explained in posts by others. > Then get or make the appropriate cable or adapter to connect the > unmodified unit and confirm that it works, BEFORE making amateur > modifications. The leads carrying the composite signal are bare, and exposed. A pair of clip leads is all that's required to gain access to that signal. > THEN, he should make the mods and connect it to a composite monitor. Sure, but if he's having trouble finding a modern TV with a tuner that "likes" the TS1000 (most modern TVs don't), then using clip leads to grab the signal would at least verify functionality of the computer. Bearing in mind that the TS1000 has been described as "common as cockroaches" (Sellam Ismael) and "an educational toy" (Richard Erlacher), plus the fact that the ZX81 was originally sold as a kit and zillions of them were assembled by schoolchildren, I think my advice was reasonably appropriate. Feeling grumpy today, Fred? ;>) Glen 0/0

22 years, 1 month

Other interesting Intel chips (was iAPX 432 (was Re: 88000 machines))

by dwightk.elvey＠amd.com

>From: "Eric Smith" <eric(a)brouhaha.com> > >It's pretty tough to get iAPX 432 stuff. The software is even more >difficult to find than the boards or chips. > Hi The 432 stuff is really hard to get. I do have another almost as hard to find Intel item. It is a evaluation setup for the i2920, not to be confused with the AMD 2920. It is an early DSP chip. It was Intel's idea of what should be done in DSP. It was not too successful because it was not a general purpose type processor like the TI and Motorola DSP entries. It was designed to do a single program, repetitively. One of the example programs was to make a simple spectrum analyzer. You'd feed analog data in and it would run an oscilloscope as the display. It would just need a anti-aliasing filter for the input and connect to the scope. Some of the other hard to find Intel parts are things like the 8021 and 8022 parts. Although not as rare, the 3000 series bit slice parts are getting harder to find as well but these were used on many of the older Multibus disk controller cards. Dwight

22 years, 1 month

RF output DOES NOT equal Composite!!!!

by acme_ent＠bellsouth.net

> From: Fred Cisin (XenoSoft) <cisin(a)xenosoft.com> > > btw if you need or know of anybody else here in town that does, I have an > > Amiga 1080 color composite monitor w/sound taking up space.. > > Those are very nice. But it will NOT work for a device that only outputs > RF. No, but he could tap the composite signal off of the Timex pcb a feed a composite monitor with it. Glen 0/0

22 years, 1 month

Network card for LaserJet

by Antonio.Carlini＠riverstonenet.com

> > Okay, Tony. You got me. I guess I should've said "...used for RS-232 >communication." > Or would it be RS-432? :P RS-4xx for almost all xx seems to end up being a serial protocol. RS-422/RS-423/RS-449 (and obviously RS-232) seem to be the most common ones but there seems to be a fair number of relatively obscure ones too. Antonio

22 years, 1 month

One SCSI tape connected to 2 hosts?

by Antonio.Carlini＠riverstonenet.com

>My vaxstation 4000/60's host scsi id is also 6. The early DEC SCSI machines set the host adapter to ID 6, leaving the highest priority ID (7) free. I read something somewhere that suggested that this was insurance just in case something came along that demanded to be the highest priority thing on the bus. Apparently nothing did because the later machines allow the host adapter ID to be set via the console. Typically disks are given lower numbers than tapes, CDROMs seem to sit in the middle. I doubt that it matters in most configurations (it's certainly nowhere near as critical as, say, Qbus priority). Antonio

22 years, 1 month

Sioux City hamfest

by dwightk.elvey＠amd.com

>From: "Gary Hildebrand" <ghldbrd(a)ccp.com> > >Not much to report here, nice turnout, and a few odd items worth noting >. . . . . > >There was a Fluke something, that looked like some sort of terminal that >set up data acquisition on an IEE-488 buss. He had the complete unit >and software and docs. All I remember is that the CRT had a 2:1 aspect >ratio. I'm sure this will turn on some of you obscure stuff collectors. ---snip--- Hi This sounds like the touch screen terminal that Fluke made. This was early touch screen technology and was larger touch locations. Still, it was good enough for simple menu entry. Dwight

22 years, 1 month

Timex Sinclair 1000 Update and Questions

by dwightk.elvey＠amd.com

>From: "Doc Shipley" <doc(a)mdrconsult.com> > ---snip--- > The card-edge cartridge connector is worn nearly through the traces on >the m/b. If the computer is jostled much at all, it loses the RAM and >its little mind. Next mod will be to do some (cheesy, yes I know) wire >patching to the finger traces. ---snip--- Hi As I've mentioned in the past, If you put some silicon grease, like DC#4 on the fingers, you won't have the erratic contact problem on things like the Sinclair. It improve contact by keeping surface oxides from forming. It is non-conductive so it won't cause other problems. Dwight

22 years, 1 month

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test-drb June 2002