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Rewrite mapper 134 emulation for simplicity. Fix WRAM-using games. Remove leftover code from mmc3.c. Initialize the Frame IRQ register only on power-on reset, not soft-reset, which is necessary for two multicarts.

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NewRisingSun
2022-02-19 12:53:26 +01:00
parent f27adb5209
commit 53bca8e9bf
7 changed files with 101 additions and 302 deletions
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43
src/boards/mmc3.c
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@@ -881,49 +881,6 @@ void Mapper119_Init(CartInfo *info) {
AddExState(CHRRAM, CHRRAMSIZE, 0, "CHRR");
}
/* ---------------------------- Mapper 134 ------------------------------ */
/* ---------------------------- UNL-T4A54A ------------------------------ */
/* UNL-T4A54A, functionally the same as mapper 134.
* Writes @ $6801. Menu @ prg $20000, chr $00000 */
static void M134PW(uint32 A, uint8 V) {
uint8 mask = (EXPREGS[0] & 0x04) ? 0x0F : 0x1F;
setprg8(A, (V & mask) | ((EXPREGS[0] & 3) << 4));
}
static void M134CW(uint32 A, uint8 V) {
uint8 mask = (EXPREGS[0] & 0x04) ? 0x7F : 0xFF;
setchr1(A, (V & mask) | ((EXPREGS[0] & 0x30) << 3));
}
static DECLFW(M134Write) {
EXPREGS[0] = V;
FixMMC3CHR(MMC3_cmd);
FixMMC3PRG(MMC3_cmd);
}
static void M134Power(void) {
EXPREGS[0] = 0x01;
GenMMC3Power();
SetWriteHandler(0x6001, 0x6001, M134Write);
SetWriteHandler(0x6801, 0x6801, M134Write);
}
static void M134Reset(void) {
EXPREGS[0] = 0x01;
MMC3RegReset();
}
void Mapper134_Init(CartInfo *info) {
GenMMC3_Init(info, 256, 256, 0, 0);
pwrap = M134PW;
cwrap = M134CW;
info->Power = M134Power;
info->Reset = M134Reset;
AddExState(EXPREGS, 4, 0, "EXPR");
}
/* ---------------------------- Mapper 165 ------------------------------ */
static void M165CW(uint32 A, uint8 V) {