4 ms·
The 6502 doesn't have separate io addresses so you need to fit all devices in a 64k space, not just ROM.
by wkjagt 8mo ago
The 6502 doesn't have separate io addresses so you need to fit all devices in a 64k space, not just ROM.
- p0w3n3d 8mo agoAtari 130XE used bank switching to handle more memory along with the IO-reserved memory (i.e. you had an address $D301 where you would change bits for the memory bank, and it would redirect $4000 – $7FFF to another bank in the extended memory)
- wkjagt 8mo agoYeah the Commodore 64 did something similar. I love that era of hardware.