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Old 14th May 2019, 12:15 am   #32
JohnBHanson
Heptode
 
Join Date: Aug 2009
Location: Worthing, Sussex, UK.
Posts: 661
Default Re: Gemini 80-Bus System

For the unknown ports b4, b5, b6, b7 are the Z80 pio on the GM811 - which is not configured in the Gemini.cfg file.

Port ff is ram paging (Not used GM813 has much better memory management)
Port f8 - I don't know, might be keyboard on a GM811 processor card
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