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Mapper 268.0/1: Add 64 MiB variant (YH2018A PCB).

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NewRisingSun
2025-12-13 02:28:38 +01:00
parent d0c3023e14
commit 78b9d810e1
1 changed files with 7 additions and 6 deletions
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13
src/boards/268.c
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@@ -34,12 +34,13 @@ static void Mapper268_PRGWrap(uint32 A, uint8 V) {
;
switch(submapper &~1) {
default: /* Original implementation */
prgMaskGNROM =EXPREGS[3] &0x10? (EXPREGS[1] &0x02? 0x03: 0x01): 0x00;
prgOffset =EXPREGS[3] &0x00E
|EXPREGS[0] <<4 &0x070
|EXPREGS[1] <<3 &0x080
|EXPREGS[1] <<6 &0x300
|EXPREGS[0] <<6 &0xC00;
prgMaskGNROM = EXPREGS[3] &0x10? (EXPREGS[1] &0x02? 0x03: 0x01): 0x00;
prgOffset = EXPREGS[3] &0x000E
| EXPREGS[0] <<4 &0x0070
| EXPREGS[1] <<3 &0x0080
| EXPREGS[1] <<6 &0x0300
| EXPREGS[0] <<6 &0x0C00
|~EXPREGS[1] <<12 &0x1000;
break;
case 2: /* Later revision with different arrangement of register 1 */
prgMaskGNROM =EXPREGS[3] &0x10? (EXPREGS[1] &0x10? 0x01: 0x03): 0x00;