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XOR S-100-4 Computer 1982-3

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  XOR S-100-4 Computer 1982-3 by Bill Degnan - 07/09/2007 11:18


I recently purchased a XOR S-100-4 computer from Jim Battle.
http://www.thebattles.net/xor/xor.html

This weekend I took some new pictures:

http://www.vintagecomputer.net/xor/

With very little work I was able to get this machine up and running. Jim did a great job in restoring it to working order.

Product Ad from 1983

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  US Micro ad for XOR S-100 products by Bill Degnan - 04/19/2012 20:11
I believe US Micro distributed the XOR line, perhaps XOR folded and US Micro bought them out...

Another US Micro ad for XOR hardware from Byte April 1983.

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  Delta Products by Don Burns - 10/27/2016 21:36
Delta Products built and sold these S-100 systems. Then their name changed to XOR (at same physical location) and may have been because purchased by US Micro. I believe for a period of time bare bone boards were sold as XOR while Delta Product boards were populated. Not real sure anymore. XOR also made early PC clones before disappearing. I have a multi-page US Micro sale booklet and a 1982 price sheet.

FOLLOWUP:
More info on the Delta Prod/XOR Z-80 board & 64K dynamic RAM boards - they both used S-100 pin 60 (SIXTN) for MREQ* vs. the more common pin 65. Plus the CPU board can only address 20 address lines and not the full 24 address lines of the S-100 spec's. Easy to change the first one once you are aware of it.


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