lidnariq wrote:
repurposing CHR banking bits (like mapper 245)
It's a good idea to visit more than 512k prg!
A19 connect to the CHR A??
Code:
Init high 512k bit
lda #$0
sta $8000
lda #$2
sta $8001
then
lda #$6 or 7
sta $8000
lda #$XX
sta $8001
bank the high 512k
but can't direct bank the high bank like:
Code:
lda #$6 or 7
sta $8000
lda #$40
sta $8001
lidnariq wrote:
replacing PRG-RAM with a register that swaps 512KB blocks (similar to mapper 47)
Is similar to mapper245?
lidnariq wrote:
You could use the '139-based plan listed there, and replace 1/E←A13 and 2A0←A12.
Good idea ,I'll try this way.
lidnariq wrote:
The description on the wiki for
TQROM describes the simplest way of doing it (128KB for ROM, 128KB window for RAM)
I think i need more information and the details to do this.