Laurens Holst wrote:
Afaik MSX 1 BIOS only requires 16kB of RAM, and an engine to take care of
several things. Oh, and a VDP, ofcourse. The BIOS will not work without it,
even if it were only for the interrupt it generates.
I believe 8kB RAM is the minimum MSX1 requirement.
I haven't inspected the BIOS source code closely enough to say for sure, but I wouldn't be surprised if the PPI was not necessary. Ofcourse, no keyboard without it, so the question is really how minimal do you need to go?

Greetz,
Patriek

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