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Old 12th Jul 2019, 10:44 am   #159
john_newcombe
Hexode
 
Join Date: Apr 2019
Location: Skipton, North Yorkshire, UK.
Posts: 252
Default Re: Gemini 80-Bus System

Ok, so a swap of CPU for yet another, reveals the same symptoms. Then it dawned on me... what if there is a minor issue with the data bus such that the IN instruction is corrupted to something else.... hmmm vacation over.
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