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8237A: Fixed outer PRG banking for NROM mode

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negativeExponent
2022-02-27 15:45:18 +08:00
parent cfc3b17e34
commit 54fed71574
1 changed files with 2 additions and 2 deletions
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4
src/boards/8237.c
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@@ -86,7 +86,7 @@ static void UNL8237PW(uint32 A, uint8 V) {
if (EXPREGS[0] & 0x40) {
uint8 sbank = (EXPREGS[1] & 0x10);
if (EXPREGS[0] & 0x80) { /* NROM */
uint8 bank = ((EXPREGS[1] & 3) << 4) | (EXPREGS[0] & 0x7) | (sbank >> 1);
uint8 bank = (outer_bank >> 1) | (EXPREGS[0] & 0x7) | (sbank >> 1);
if (EXPREGS[0] & 0x20) /* NROM-256 */
setprg32(0x8000, bank >> 1);
else { /* NROM-128 */
@@ -97,7 +97,7 @@ static void UNL8237PW(uint32 A, uint8 V) {
setprg8(A, outer_bank | (V & 0x0F) | sbank);
} else {
if (EXPREGS[0] & 0x80) { /* NROM */
uint8 bank = ((EXPREGS[1] & 3) << 4) | (EXPREGS[0] & 0xF);
uint8 bank = (outer_bank >> 1) | (EXPREGS[0] & 0xF);
if (EXPREGS[0] & 0x20) /* NROM-256 */
setprg32(0x8000, bank >> 1);
else { /* NROM-128 */