On 4/23/23 04:32, Maciej Witkowiak wrote: > This got me thinking: how does a real SCPU handle access to $01 port? > > I guess that SuperCPU's CPLD can track the writes to $01 and update its > internal memory config: providing ROM data from its own copy when > needed. The I/O access might be managed by dropping in/out of the > Ultimax mode. There's some information in this article from Commodore World: https://www.lyonlabs.org/commodore/hardware/suprtime.pdf It's mostly about SuperRAM, but has some general information as well. -- Glenn Holmer (Linux registered user #16682) "After the vintage season came the aftermath -- and Cenbe."Received on 2023-04-24 17:00:02
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