SRAM $4000-$BFFF LDA $0A | ORA #$80 | STA $0A
NAND --- 只能读取，不能切换。
NOR $4000-$BFFF LDA $0A | AND #$7F | STA $0A | LDA #$01,02.... | STA $00
BIOS $E000-$FFFB 固定，不需要切换。
RAM04 $C000-$DFFF LDA $0A | AND #$F0 | ORA #$01 | STA $0A
ActiveBIOS $C000-$DFFF LDA $0A | AND #$F0 | ORA #$02,03.... | STA $0A
RAMB $2000-$27FF LDA #$04 | STA $0D
发表于 2007-4-21 16:49:13
楼主
发表于 2007-4-28 12:03:07