I found a box of these boards at a scrap place. I have ten boards, two
backplanes, and a bus extender. I don't exactly know what these are,
however. The connectors are "eurocard" style (I think that's what they
are called), they look similar to Macintosh NUBUS connectors. I don't
really know much about them other than what components are on the
boards.
The boards:
http://24.194.65.231/images/gespac_boards.jpg
CPU board: GESMPU-4B
It uses a Motorola MC68000FN8, some PLA's, two 27128's, and a 1488/1486
driver pair. It has a twenty pin IDC header on the edge of it, and two
pushbuttons, one red and one black. It also has a five pin header, and
two LED's.
http://24.194.65.231/images/gespac_cpu.jpg
Parallel board: GESPIA-2A
It has two MC6821P's on it, and two twenty six pin IDC headers on the
edge.
http://24.194.65.231/images/gespac_pia.jpg
Serial board: GESSIO-1E
It has two 6850's. It also has two sockets for a 1488/1489 driver pair,
but the chips are missing, with a post-it in the package, with "MC1488P
MC1489P" written on it, as if someone borrowed the chips, and left a
note. There are two twenty pin headers on the edge.
http://24.194.65.231/images/gespac_serial.jpg
INC board (whatever that is...): GESINC-1
A bunch of TTL logic, some PLA's, a 34 pin IDC header, a ten pin IDC
header, and another one of those five pin headers like on the CPU board.
http://24.194.65.231/images/gespac_inc.jpg
RAM board: GESRAM-4B
18 TMS4256-12NL DRAMs and a bunch of logic chips.
http://24.194.65.231/images/gespac_ram.jpg
I also have a bus extender card. It's just a board with a connector on
both ends, and a jumper block to select which signals are connected.
http://24.194.65.231/images/gespac_extender.jpg
Anyone know what these boards are for? What kind of a computer might
these have come from? I probably have enough parts to create a working
computer, but I'll need to figure out how to connect a storage device,
and find some bootable media. Two of the three CPU cards have two NVRAM
chips on them, the other one has two ROM chips in it's place, so I'm
worried that the NVRAM might have become slightly more V over time, so
I don't know if I could get them to work. I have three CPU boards, two
parallel boards, two serial boards, two INC boards, and one RAM board.
I also have two backplanes and the bus extender. The backplanes are
labeled with the proper voltages, so powering it shouldn't be a
problem, the problem will be figuring out what the pinouts of the
serial ports are, etc. Any ideas?
Thanks!
Ian Primus
ian_primus_at_yahoo.com
Received on Wed Nov 12 2003 - 20:12:23 GMT
