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Mapper 432: Revise to support 160000000-in-1 multicart

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NewRisingSun
2022-02-15 21:26:10 +01:00
parent f39506365a
commit 69d3723c37
1 changed files with 20 additions and 10 deletions
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30
src/boards/432.c
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@@ -24,33 +24,43 @@
#include "mmc3.h" #include "mmc3.h"
static void M432CW(uint32 A, uint8 V) { static void M432CW(uint32 A, uint8 V) {
if (EXPREGS[0] & 4) int chrAND = EXPREGS[1] &0x04? 0x7F: 0xFF;
setchr1(A, (V & 0x7F) | ((EXPREGS[0] << 7) & 0x80) | ((EXPREGS[0] << 5) & 0x100)); int chrOR = EXPREGS[1] <<7 &0x080 | EXPREGS[1] <<5 &0x100;
else setchr1(A, V &chrAND | chrOR &~chrAND);
setchr1(A, V | ((EXPREGS[0] << 5) & 0x100));
} }
static void M432PW(uint32 A, uint8 V) { static void M432PW(uint32 A, uint8 V) {
if (EXPREGS[0] & 4) int prgAND = EXPREGS[1] &0x02? 0x0F: 0x1F;
setprg8(A, (V & 0x0F) | ((EXPREGS[0] << 4) & 0x10) | ((EXPREGS[0] << 1) & 0x20)); int prgOR = EXPREGS[1] <<4 &0x10 | EXPREGS[1] <<1 &0x20;
else if (A <0xC000 || ~EXPREGS[1] &0x40) setprg8(A, V &prgAND | prgOR &~prgAND);
setprg8(A, (V & 0x1F) | ((EXPREGS[0] << 1) & 0x20)); if (A <0xC000 && EXPREGS[1] &0x40) setprg8(A |0x4000, V &prgAND | prgOR &~prgAND);
}
static DECLFR(M432Read) {
if (EXPREGS[0] &1)
return EXPREGS[2];
return CartBR(A);
} }
static DECLFW(M432Write) { static DECLFW(M432Write) {
EXPREGS[0] = V; EXPREGS[A &1] = V;
FixMMC3PRG(MMC3_cmd); FixMMC3PRG(MMC3_cmd);
FixMMC3CHR(MMC3_cmd); FixMMC3CHR(MMC3_cmd);
} }
static void M432Reset(void) { static void M432Reset(void) {
EXPREGS[0] = 0; EXPREGS[0] = 0;
EXPREGS[1] = 0;
EXPREGS[2] = (EXPREGS[2] +1) &3;
MMC3RegReset(); MMC3RegReset();
} }
static void M432Power(void) { static void M432Power(void) {
EXPREGS[0] = 0; EXPREGS[0] = 0;
EXPREGS[1] = 0;
EXPREGS[2] = 0;
GenMMC3Power(); GenMMC3Power();
SetReadHandler(0x8000, 0xFFFF, M432Read);
SetWriteHandler(0x6000, 0x7FFF, M432Write); SetWriteHandler(0x6000, 0x7FFF, M432Write);
} }
@@ -60,5 +70,5 @@ void Mapper432_Init(CartInfo *info) {
pwrap = M432PW; pwrap = M432PW;
info->Power = M432Power; info->Power = M432Power;
info->Reset = M432Reset; info->Reset = M432Reset;
AddExState(EXPREGS, 1, 0, "EXPR"); AddExState(EXPREGS, 3, 0, "EXPR");
} }