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More mapper 45 fixes

This commit is contained in:
Alexey 'Cluster' Avdyukhin 2023-10-26 23:33:49 +04:00
parent 764e1ebd76
commit 5a5faa7372
1 changed files with 16 additions and 8 deletions
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24
src/boards/mmc3.cpp
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@ -514,14 +514,22 @@ static void M45PW(uint32 A, uint8 V) {
}
static DECLFW(M45Write) {
if (EXPREGS[3] & 0x40) {
WRAM[A - 0x6000] = V;
return;
WRAM[A - 0x6000] = V;
if (!(A & 1))
{
if (EXPREGS[3] & 0x40) {
WRAM[A - 0x6000] = V;
return;
}
EXPREGS[EXPREGS[4]] = V;
EXPREGS[4] = (EXPREGS[4] + 1) & 3;
FixMMC3PRG(MMC3_cmd);
FixMMC3CHR(MMC3_cmd);
}
else {
// lock reset
EXPREGS[3] &= ~0x40;
}
EXPREGS[EXPREGS[4]] = V;
EXPREGS[4] = (EXPREGS[4] + 1) & 3;
FixMMC3PRG(MMC3_cmd);
FixMMC3CHR(MMC3_cmd);
}
static DECLFR(M45Read) {
@ -542,7 +550,7 @@ static void M45Reset(void) {
static void M45Power(void) {
GenMMC3Power();
EXPREGS[0] = EXPREGS[1] = EXPREGS[2] = EXPREGS[3] = EXPREGS[4] = EXPREGS[5] = 0;
SetWriteHandler(0x5000, 0x7FFF, M45Write);
SetWriteHandler(0x6000, 0x7FFF, M45Write);
SetReadHandler(0x5000, 0x5FFF, M45Read);
}