29 Dec
2001
29 Dec
'01
10:50 p.m.
OK... first of all, let me say that an XOR box weighs a ton. Second,
here's what I have - more cards than a single computer needs. I wish
I hadn't given away _all_ of my 68K S-100 stuff to a friend years ago
(but at least it's in good hands)
In the backplane when I got it:
o COMPU/TIME UFDC-1 floppy disk controller, c. 1983
Labelled jumpers for drives A-D, each with "5/8", "S0" and
"S1"
1 34-pin connector
1 50-pin connector
WDC FD1795PL-02 FDC chip
no docs
o COEX 64K static RAM board, c. 1984
32 Hitachi M58725P 2Kx8 SRAM chips
no docs (but jumpers are labelled)
o COMPU/TIME SBC-880 CPU board (c) 1980
no CPU chip
Loose boards...
o QT Computer Systems RAM+65 SRAM board, c. 1981
32 2114 SRAMs (16K total)
missing IC49 (near the S-100 fingers, probably a 74LS240 or 74LS244)
labelled DIP switches
no docs
o Vector Graphic 8K SRAM board, c. 1980
64 2102 SRAMs
no docs
o Seals Electronics SRAM board, (c) 1976
64 2102 SRAMs (8K)
no docs
o SSM VB1C video card, c. 1980
docs
o SSM VB2 video card, c. 1979
chips still under plastic
docs
o Cromemco TU-ART Digital Interface, c. 1982
2 parallel
2 serial
NIB
docs
o Vector Graphic Bit Streamer serial card
8251 SIO chip
no docs
o MITS 88 UIO "Universal I/O Card"(?) c. 1977
M6850
AY-5-10134
26-pin Berg-styled connector
10-pin .154"(?)-spacing single-row connector (P-2)
no docs
o Unknown-brand mystery card (video?), c. 1979
8212
2 x 2708 EPROM (each marked 'FW II Gen', one with down arrow, one up)
4 x 2114-3 SRAMs
6-pin .1"-spacing single-row connector
U42 missing (24-pin .6" DIP)
no docs
o SSM CB1A CPU board, c. 1980
INS8080A
2 x 8212
2 x 2708 (marked "0-3V" and "4.7V")
2 x 2114
docs
o SSM 8080 Monitor V1 docs
command summary
listings
So, all in all, a good night's work. I'd love to learn more about
what I have, especially the stuff with no docs. Some of the docs
I do have, have schematics, but some of it is assembly and rudimentary
test/programming instructions.
I would appreciate any and all tips to online versions of docs for
this stuff. I would also appreciate any tips for getting an OS for
the box with its COMPU/TIME cards. I suppose one way would be to
receive a 5.25" image, reconstitute it and boot the system off of
mini-floppy, then format a disk or two on the 8" floppies and go
from there.
-ethan
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