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In the earlier post I wrote about testing an SD-Systems SBC-200 single board computer for the S-100 bus using my Northstar Horizon mainframe. The end result of that testing was that the board seemed ...
... a known working S-100 test machine (The Northstar Horizon) and an unbuilt PCB for the S-100 bus motherboard put me in a good position to remove some of the unknowns so I agreed.  Always one for an ...
... is a very good chance that neither will write (or even read) older parts even if the "supported parts list" suggests they will. I ran into this problem with the 2708 EPROM on the Northstar ZPB Z80 ...
In mid 2015 I was lucky enough to acquire a Northstar Horizon computer from a fellow collector who was disposing of his equipment.   After seeing my father work with MDL (MicroProcessor ...

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jaquinn@ihug.co.nz http://twitter.com/jaquinn