On 9/22/2019 6:39 AM, Michał Pleban wrote: > Hello! > > Jim Brain wrote: >> * Not sure how to hide the registers under some other IO, like SID >> mirrors or such, as any write will bleed through to the SID, unless >> IO is mapped out (and, I think memory write enable is not strobed >> when you are in IO space, but I could be wrong. Either way, hiding >> under IO means essentially you'll have to bank IO out to use. I'm >> not sure that's useful. > SID uses only registers $D400-$D41C, so you could reuse $D41D-$D41F > without any worry that the writes do anything to the SID. > > Regards, > Michau. > > 2 issues: * Some of the newer DIS replacements use those addresses * The MMU needs far more than 4 addresses, unless I switch to indirect registers (IO1 is the address, IO2 is the data), but I'd prefer not to do that. Jim -- Jim Brain brain_at_jbrain.com www.jbrain.comReceived on 2020-05-29 22:41:53
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