Data Science XOR
Owner: Dave Coughlin
One computer that I don't see in your collection is
the XOR CP/M computer that I found in a basement. I have
the manuals for it and the full schematics (wow) and this one is dated around 1982. I
have it connected to an ADDS
Regent 25 terminal with a null modem rs232 cable
(9600 baud) . There is also a parallel port on the back and another serial port.
This one has 2 8" floppy drives, and I bought the
last box of 8" floppies I could find in town ! (I
think the store owner was glad to see them go...) I
believe these computers were sold as a kit and you could
pick components that you wanted. I have included a bad picture of the guts.
Here is a little more on the specs right from the
The XOR CPU was developed in 1977 and since then has
undergone numerous design changes to take advantage of
advancements in technology, and to conform to the IEEE
696 S-100 standards. A typical personal or business
computer can be configured with only three boards and a
mainframe power supply.
1. XOR CPU:
- Z80A 4 Mhz processor
- 2 serial RS232 I/O ports 8251
- 3 8 bit parallel I/O ports 8255
- On-board 2716 monitor PROM
- M1 Wait state Generation
- Memory management
- Z80 DART/SIO
- Board can now be used as a network slave or
2. XOR DSK:
- WD 1795 Controller Chip set
- Single Density IBM 3740
- XOR Double density 8 in. (1.2 meg !!)
- Concurrent 8in and 5in operation
3. XOR 64K Dynamic RAM:
This was taken from the XOR Data Science, Inc CPU
Operation Manual. How about them specs !
I have also included a picture of my other junkers. Pictured are my
Kaypro II, One of 5 (!) Apple III's with external floppy
AND 5 megabyte hard disk (under monitor), a MAC 128K, a
Commodore Plus 4 (complete with box and manuals) and a
CompaQ Luggable. Next to the Compaq is a 40 meg HD from a
Wang Mainframe (2200) made by Quantum (currently used as
P.S. A shameless plug: I am looking for an Apple
LISA/XL for my almost complete MAC collection - If you
ever come across one running or not, and don't want it,
PLEASE email me !
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