test-drb March 2002

test-drb@ccmp.vtda.org

292 participants
932 discussions

by pete＠dunnington.u-net.com

On Mar 22, 17:18, R. D. Davis wrote: > Quothe Pete Turnbull, from writings of Fri, Mar 22, 2002 at 06:11:34PM +0000: > > Didn't anyone else show interest in TSX? > > If I recall correctly, I did. Weren't there at least five of us? I thought there were at least three or four, but I wasn't sure about more -- and it's not worth Jerome's while to do anything unless there's enough interest. -- Pete Peter Turnbull Network Manager University of York

22 years, 4 months

ZX81 and 6116

by pete＠dunnington.u-net.com

On Mar 22, 22:43, Richard Erlacher wrote: > I guess I'm having a "senior moment" but I don't remember the 4118 at all, > though I definitely remember that there was such a thing. Mostek made a > couple of pseudo-static RAM parts that were on a ~2716-compatible pinout. Was > that one of them? I've got some 1K- and 2K- byte parts from those days but I > don't remember the numbers right offhand. > > Perhaps someone could refresh my recollection. 4118 is the same pinout as a 2716 except that pin 21 is the /WR line instead of Vpp, and pin 19 is NC instead of A10. It's a genuine static part, 1K x 8. A 6116 is similar, but 2K x 8, with A10 on pin 19. There are also low-power CMOS versions of the 6116. Zilog made a "quasi-static RAM" 4K x 8, called Z8132, but it's 28-pin. They also, confusingly, made 16-pin dynamic RAMs 8K x 1 and 16K x 1 called Z6115 and Z6116, similar to the more common 4116 DRAM. -- Pete Peter Turnbull Network Manager University of York

22 years, 4 months

DCA IRMA-III convertible 3270 interface

by doc＠mdrconsult.com

Wasn't there some mention of these things a few weeks ago? Was somebody looking for one? I seem to have a couple. It's a flip-over MCA/ISA adapter. Speaking of PS/2s and 3270s, did Sridhar permanently toast himself? He's been notably absent lately. Doc

22 years, 4 months

ZX81 I/O ports

by acme_ent＠bellsouth.net

> From: Tony Duell <ard(a)p850ug1.demon.co.uk> > You mena it's beyond the ingenuity of these people who connect up > scanners/cameras/LCD panels/... to the ZX81 to add a serial port? No, no, I meant a ZX81 doesn't have one built in. Of course we use the Z80A-SIO (and -PIO). Modems were also commercially produced in the mid-eighties which allowed a simple mod so they could also be used as serial ports. > I've not tried it, but I can see no good reason why you couldn't link up > just about any common serial chip/UART to the expansion connector, and > then buffer the outputs of that to/from RS232 levels. It's been done any number of ways. ZX-TEAM also has a ZX81-hosted BBS ;>) Glen 0/0

22 years, 4 months

ZX81 and 6116

by pete＠dunnington.u-net.com

On Mar 22, 23:51, Glen Goodwin wrote: > > From: Pete Turnbull <pete(a)dunnington.u-net.com> > I read that using the 2114s saved Uncle Sir Clive 25p per unit. When the 4118 was scarce, that was probably true. > I've also > noticed that on the earlier boards all the ICs were socketed, but the later > ones were spotty, socket-wise. Typical Sinclair chintziness. Not necessarily. A soldered connection is generally more reliable than a socketed one. For that reason, many manufacturers solder most parts, unless they contain firmware that might need changed, or are custom parts subject to revision (PALs, ULAs, etc). -- Pete Peter Turnbull Network Manager University of York

22 years, 4 months

DCA IRMA-III convertible 3270 interface

by mcguire＠neurotica.com

On March 23, Doc wrote: > Car seats? Get a grip. Yes, literally, too. At spring break, on the > beach or near it, a motorcycle is the *only* acceptable conveyance. It's a Porsche 911 convertible. Think you can make an exception to that rule? ;) > <flamebait> > European or Russian only. > </flamebait> Uh-huh. Troublemaker. ;) -Dave -- Dave McGuire "Watch those lateral G's man, St. Petersburg, FL I've got sandwiches in my lap!" -Sridhar

22 years, 4 months

A good glue guide

by vcf＠siconic.com

Here's an interesting site. You tell it what two materials you want to glue together and it makes recommendations. http://www.thistothat.com/ -- 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, 4 months

DCA IRMA-III convertible 3270 interface

by mcguire＠neurotica.com

On March 23, Doc wrote: > > He's still crashing on my couch...I think the whoe gulf coast thing is > > getting to his brain. Clean air and...umm...well, spring break, > > beach, bikinis that are about this --> <-- big, you kno... ;) > > > > There have been some sights around here that I'd swear were about to > > make his little mainframe-hackin' head explode. ;) > > To which, I assume, Mr. McGuire is totally immune? Are you kidding? I've just escaped living near College Park, Maryland for the past nine years. I haven't seen this many heterosexual women in the same place at the same time in, oh, about nine years. I now find it prudent to apply a liberal quantity of ScotchGard(tm) to my car seats before going out. -Dave -- Dave McGuire "Watch those lateral G's man, St. Petersburg, FL I've got sandwiches in my lap!" -Sridhar

22 years, 4 months

DCA IRMA-III convertible 3270 interface

by mcguire＠neurotica.com

On March 23, Doc Shipley wrote: > Speaking of PS/2s and 3270s, did Sridhar permanently toast himself? > He's been notably absent lately. He's still crashing on my couch...I think the whoe gulf coast thing is getting to his brain. Clean air and...umm...well, spring break, beach, bikinis that are about this --> <-- big, you kno... ;) There have been some sights around here that I'd swear were about to make his little mainframe-hackin' head explode. ;) -Dave -- Dave McGuire "Watch those lateral G's man, St. Petersburg, FL I've got sandwiches in my lap!" -Sridhar

22 years, 4 months

SIMTEL (was Re: Source code for 805x line-by-line assembler?)

by acme_ent＠bellsouth.net

> From: Douglas Quebbeman <dhquebbeman(a)theestopinalgroup.com> > Personal preference here is for the traditional macro assembler > generating .HEX files... SIMTEL has quite an extensive collection > of software for the 8031/8032/8051/8052 and derivatives... Doug, does the SIMTEL20 repository still exist? Where? I don't mean simtel.com where all the DOS and Windows stuff is . . . Glen 0/0

22 years, 4 months

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test-drb March 2002