test-drb December 2001

test-drb@ccmp.vtda.org

243 participants
1096 discussions

6502/Z80 speed comparison (was MITS 2SIO serial chip?)

by ajp166＠bellatlantic.net

From: Richard Erlacher <edick(a)idcomm.com> >There are lots of things that you could compare, but the first things you've got >to leave out are the ones that aren't a Z80, which immediately deletes the Z180, >and Z280. The Z80 is not around any more than the 6502 is around. There are Why? they are still z80 core and code compatable. While they add things like serial IO, timers and MMU they are Z80, maybe more so than 65C02. Allison

24 years, 1 month

MITS 2SIO serial chip?

by ajp166＠bellatlantic.net

From: Bill Pechter <pechter(a)ureach.com> >IIRC the Intel 8251 did full Sync as well as >Async which was a plus. It's annoying Yes, worked ok too. >drawback -- (DEC used it in the Robin and >Rainbow) was the lack of modem flow control >support. Design limited but it was there in the Robin. The robin was full modem controls on the comm port. >I'd have killed for an 8251 with >CTS/RTS/DSR/DTR and DCD all on chip. The only one the 8251 doesn't handle or have a pin for was DCD. The others are all there. >Perhaps it should've been done on two chips >if Intel couldn't get it on one. Pincount, they would have needed a 29 pin. ;) Allison

24 years, 1 month

Microchannel FDDI

by vance＠ikickass.org

Hi. I am looking for Microchannel (MCA) DAS FDDI cards for my RS/6K's. Thanks. Peace... Sridhar

24 years, 1 month

ROM preservation (Data I/O system 19)

by CLeyson＠aol.com

Geoff Reed wrote > I don't suppose you have the schematics for a model 29? Sorry Geoff can't help there. However if enough people are interested I am prepared to draw up the System 19 schematics in Orcad and provide a dump of the software. As the programmer is 20 years old, it falls into the classic category and should be documented somehow. More important still - programming algorithms for vintage silicon should be documented. Chris Leyson

24 years, 1 month

Microchannel FDDI

by SUPRDAVE＠aol.com

In a message dated 12/21/01 5:19:04 PM Eastern Standard Time, vance(a)ikickass.org writes: << Hi. I am looking for Microchannel (MCA) DAS FDDI cards for my RS/6K's. Thanks. >> Ive got two SKNet ones that i'd be willing to trade provided you can find me some Serverguard cards...

24 years, 1 month

ROM preservation (DataIO system 19)

by CLeyson＠aol.com

Correction: Supports devices up to 27256 and Intel Intellec 8/MDS

24 years, 1 month

ROM preservation

by csmith＠amdocs.com

I've been thinking recently that I should possibly get a ROM reader/writer so that I can preserve the ROMs out of all my old parts, and I was wondering whether anyone had some experiences (good or bad) with any different programmers? Which programmers are good, which aren't so good, and why? Where is the best place to get one, and which is the best to get on a tight budget? What about making your own? (Note that I think this may be an interesting project, but I'd really rather put my time into other things right now, so this is near the bottom on my list of options...) One called "Leaper 3" interests me because of its ability to copy one ROM to another without any kind of computer hookup, which I imagine might be useful, but I know nothing else about it. Regards, Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

24 years, 1 month

HP 1000/E

by pete＠dunnington.u-net.com

On Dec 21, 11:35, Steve Robertson wrote: > Took deliveery of my "New" HP 1000/E last week and yes Virgina, there really > is a Santa Clause. For those who would bash eBay, here's proof that there > are good deals to be had. Nice machine! I can see why you'd be pleased :-) -- Pete Peter Turnbull Network Manager University of York

24 years, 1 month

ROM preservation

by CLeyson＠aol.com

DataIO and Stag programmers seem to be the industry standard. I picked up a DataIO system 19 on ebay recently. It will do vintage eproms up to 27128 as well as bipolar proms, no support for PAL's and PLA's. Comes with RS232, and supports most data formats except Intel Hex. Chris Leyson

24 years, 1 month

siemens nixdorf laser printer drivers--model pageprinter md12.

by ROCKYROADENNIS＠aol.com

printer-driver needed for above printer regardsrockyroadennis(a)aol.com

24 years, 1 month

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test-drb December 2001