[NES II] Select ROM only on CPU reads

JMarlin / nesii

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[NES II] Select ROM only on CPU reads #35

Closed JMarlin closed 1 week ago

JMarlin commented 1 week ago

This is preparation for making writes to the same address space trigger the mode switches

JMarlin commented 1 week ago

Tested against NOS and MARIO with no apparent regressions. Will really only know if this fully worked (short of hardware snooping) when I get into #36 so there's a full possibility of this getting reopened or an associated bug created.