3 ms·
I don't think memory at $00 and $01 are the only challenges. The 6510 has a tristateable bus. A regular 6502 doesn't. The C64 used this to disable the 6510 w
by renewedrebecca 5y ago
I don't think memory at $00 and $01 are the only challenges. The 6510 has a tristateable bus. A regular 6502 doesn't. The C64 used this to disable the 6510 when the Z80 in the cp/m card was active. (I think it also might be used to allow the VIC II to take over the bus as well, but I'm not positive about that.)