3 ms·
The problem is that the 6502 can only address 64K which includes ROM and IO Space so for any acceptable resolution you need tricks like bank switching and/or a
by LIV2 7y ago
The problem is that the 6502 can only address 64K which includes ROM and IO Space so for any acceptable resolution you need tricks like bank switching and/or a seperate memory bus.
Even on the NES the PPU RAM is on a separate bus
- jmccorm 7y agoWhat I took exception with was: 1. Not enough video memory to contain a full Mode 7 image on the VERA co-processor. 2. All co-processor access (including video memory) has to go through eight registers starting at $9F20. No problem here with bank switching. I think that's great!