test-drb September 1999

test-drb@ccmp.vtda.org

160 participants
610 discussions

by cmcmanis＠freegate.com

Hello, I am trying to connect a VT340 (A version, still looking for a G2!) up as the console on my VAX3800 in the BA213. What I need to figure out are the setup controls to do this. I have an DEC MMJ-MMJ cable, which if I connect from the console port MMJ connector to the VT340 COMM1 MMJ connector, it does not seem to work. If I use the same cable and connect it to the MMJ to Female DB25 connector and plug that into the RS232 port of the 340 it does work. I've tried setup where it says "comm type" and changed it from RS-232 to DEC-423 but that didn't have the expected effect. Clues anyone? Do I need a special MMJ "null modem" type cable or something? --Chuck

25 years, 2 months

ibm 5151 available

by jritorto＠nut.net

Anyone intersted in an ibm 5151? it's in olathe, ks. get back to me if you want it... jake

25 years, 2 months

Kaypro Computer History

by allisonp＠world.std.com

< Phil Clayton <philclayton(a)mindspring.com> wrote: < < > Kaypro Computer and Non-Linear Systems Kaypro was spun off to keep NLS as test equipment and Kaypro as computers. This was to keep the brand identification that NLS had aquired for many years doing counters, DMM and later O'scopes. I have a MS15 portabel scope that predates Kaypro computers by easily 10 years. Allison

25 years, 2 months

imaging silliness: can *YOU* id everything?

by dogas＠leading.net

That blue/blue pet's serial # is 0013854 if that explains it... - Mike: dogas(a)leading.net -----Original Message----- From: Chandra Bajpai <cbajpai(a)mediaone.net> >It's on of the first PET 2001s...8K Static RAM (1977) >From: CLASSICCMP-owner(a)u.washington.edu >Just curious, the Pet... > http://users.leading.net/~dogas/pet.jpg >

25 years, 2 months

Lisa ROMs?

by Marion.Bates＠Dartmouth.EDU

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25 years, 2 months

GoOS (was Re: imaging silliness: can *YOU* id everything?)

by max82＠surfree.com

>IBM ThinkPad (with Go >OS), Leading Edge Model D. Seeking: Apple Lisa, Kim-1 What's GoOS and what is your impression of it?

25 years, 2 months

Making Osborne 1 boot disks

by jolminkh＠nsw.bigpond.net.au

I have finally got an Osborne 1 with SSDD drives to add to my others that have SSSD drives. Now I have finally been able to boot an O1 with a SSDD boot image courtesy of Don Maslin. I have been unable to make SSSD disks on a PC. Is there any way I can now make one with the SSDD Osborne? Thanks, Hans

25 years, 2 months

Kaypro Computer History

by DD950＠prodigy.net

Here is an article on the disposition of some KayPro property in 1995: http://www.sddt.com/files/library/oldbriefs/00000069.html Former Kaypro Property Sells For $2.7 Million - Tue 24-Jan-1995 I am enjoying reading and saving all the KayPro info for our Web page. I hope you fellows don't mind your posts being posted again on a Web site? I do need some of you proud KayPro owners to scan some of the books and send me the KayPro Logo for the page atleast. Please send all the photos of KayPro you can! Regards, Jim DD950(a)prodigy.net "I'd hate to think we're seriously hampering the productivity of America. But, on the other hand, what the heck!" ( Computer game magnate Les Crane, "Time" )

25 years, 2 months

RCA 1861, NTSC and a DEC VR-201

by allisonp＠world.std.com

<You could try an emitter follower (but you'd have to arrange suitable <supply rails, since you've got a video signal that goes above and below <ground. Or an Elantec EL2001 (ditto about the supply rails). Are you sure <the video signal really goes -ve wrt ground ? (anyone want to <confirm/deny this?) the signals do not go below ground. They are driven from pin 6 on the 1861 <sync> through 3.3k to junction of another resitor 1k from pin 7 <video> and then are tied to a resistor 200ohm to ground the composite video comes >from the junction of the three. The 1861 is powered by +5v so it's not below ground referenced. An emitter follower would work but, there is the little problem of the .6-.7V offset <Vbe> that has to be taken care of. Pulling that juntion positive with a resistor in the range of 680-1600 ohms may satisfy that. Allison

25 years, 2 months

Zilog Z80-MCB

by pete＠dunnington.u-net.com

While rooting around in some Z80 stuff today, I found a couple of Zilog boards, a little less than 8" square, with 62-pin edge connectors. One (the silk-screen says Z80-MCB) is obviously a processor+RAM+ROM+I/O board, and the other (the silk-screen says MDC2) some kind of RAM board. I'm looking for any other useful information. Here's what's on them: Z80-MCB: Z80, Z80-PIO, Z80-STC, AM9551, 4 empty 24-pin (ROM?) sockets, 8 x 446, a couple of small (MMI 6306) PROMs, assorted TTL, 4-way DIP switch, a 16-pin and an 8-pin socket with jumper blocks labelled "VDU", a pair of 16-pin sockets with unlabelled jumper blocks, 19.6608MHz crystal. In the top right corner there's a single-inline 7-way socket (looks like half of a 14-pin DIL socket). Two positions, J6 (8-pin) and J2 (16-pin) are empty. The MDC2 board has a Z80-PIO, 3 banks of 8 x 4116, what appear to be a couple of bipolar PROMs (one label is illegible, the other says "33-0053-16"), and assorted TTL. Both boards have a round red device that could be a voltage regulator on them. Any information gratefully received! -- Pete Peter Turnbull Dept. of Computer Science University of York

25 years, 2 months

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test-drb September 1999