This is a general question about PPU Registers and other special Registers (like gamepad $4016) that the 6502 processor uses.
Do the devices watch those memory locations? Or is the 6502 somehow told that those memory addresses aren't real and it should therefore send a signal somewhere along the bus?
I'm just trying to get a better understanding of how those registers work and what is actually going on under the covers when you hit one of those addresses.
Thanks,
Rick
Do the devices watch those memory locations? Or is the 6502 somehow told that those memory addresses aren't real and it should therefore send a signal somewhere along the bus?
I'm just trying to get a better understanding of how those registers work and what is actually going on under the covers when you hit one of those addresses.
Thanks,
Rick