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Update vrc2and4.c

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- support for big bank CHR (Contra 3) matched by hash
This commit is contained in:
negativeExponent
2020-01-23 08:16:40 +08:00
parent 9abfd80669
commit b910e4ed92
1 changed files with 43 additions and 8 deletions
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51
src/boards/vrc2and4.c
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@@ -27,7 +27,7 @@
static uint8 isPirate, is22;
static uint16 IRQCount;
static uint8 IRQLatch, IRQa;
static uint8 prgreg[2], chrreg[8];
static uint8 prgreg[4], chrreg[8];
static uint16 chrhi[8];
static uint8 regcmd, irqcmd, mirr, big_bank;
static uint16 acount = 0;
@@ -35,6 +35,11 @@ static uint16 acount = 0;
static uint8 *WRAM = NULL;
static uint32 WRAMSIZE;
static uint8 *_CHRptr = NULL;//for 400k+128K Contra J
static uint32 _CHRsize;
static uint8 prgMask = 0x1F;
static SFORMAT StateRegs[] =
{
{ prgreg, 2, "PREG" },
@@ -43,6 +48,7 @@ static SFORMAT StateRegs[] =
{ &regcmd, 1, "CMDR" },
{ &irqcmd, 1, "CMDI" },
{ &mirr, 1, "MIRR" },
{ &prgMask, 1, "MAK" },
{ &big_bank, 1, "BIGB" },
{ &IRQCount, 2, "IRQC" },
{ &IRQLatch, 1, "IRQL" },
@@ -53,13 +59,13 @@ static SFORMAT StateRegs[] =
static void Sync(void) {
if (regcmd & 2) {
setprg8(0xC000, prgreg[0] | big_bank);
setprg8(0x8000, ((~1) & 0x1F) | big_bank);
setprg8(0x8000, ((prgreg[2]) & prgMask) | big_bank);
} else {
setprg8(0x8000, prgreg[0] | big_bank);
setprg8(0xC000, ((~1) & 0x1F) | big_bank);
setprg8(0xC000, ((prgreg[2]) & prgMask) | big_bank);
}
setprg8(0xA000, prgreg[1] | big_bank);
setprg8(0xE000, ((~0) & 0x1F) | big_bank);
setprg8(0xE000, ((prgreg[3]) & prgMask) | big_bank);
if (UNIFchrrama)
setchr8(0);
else {
@@ -95,7 +101,7 @@ static DECLFW(VRC24Write) {
case 0x8002:
case 0x8003:
if (!isPirate) {
prgreg[0] = V & 0x1F;
prgreg[0] = V & prgMask;
Sync();
}
break;
@@ -104,10 +110,12 @@ static DECLFW(VRC24Write) {
case 0xA002:
case 0xA003:
if (!isPirate)
prgreg[1] = V & 0x1F;
{
prgreg[1] = V & prgMask;
}
else {
prgreg[0] = (V & 0x1F) << 1;
prgreg[1] = ((V & 0x1F) << 1) | 1;
prgreg[0] = (V & prgMask) << 1;
prgreg[1] = ((V & prgMask) << 1) | 1;
}
Sync();
break;
@@ -174,6 +182,12 @@ static void M22Power(void) {
static void M23Power(void) {
big_bank = 0x20;
if((prgreg[2] == 0x30) && (prgreg[3]== 0x31))
{
big_bank = 0x00;
}
VRC24PowerCommon(M23Write);
}
@@ -207,6 +221,10 @@ static void VRC24Close(void) {
if (WRAM)
FCEU_gfree(WRAM);
WRAM = NULL;
if (_CHRptr)
FCEU_gfree(_CHRptr);
_CHRptr = NULL;
}
void Mapper22_Init(CartInfo *info) {
@@ -222,6 +240,23 @@ void VRC24_Init(CartInfo *info) {
info->Close = VRC24Close;
MapIRQHook = VRC24IRQHook;
GameStateRestore = StateRestore;
prgMask = 0x1F;
prgreg[2] = ~1;
prgreg[3] = ~0;
if (info->CRC32 == 0xa20ad5d6)//400K PRG+ 128K CHR
{
prgreg[2] = 0x30;
prgreg[3] = 0x31;
prgMask = 0x3F;
big_bank = 0x00;
_CHRsize = 128 * 1024;
_CHRptr = (uint8*)FCEU_gmalloc(128*1024);
memcpy(&_CHRptr[112 * 1024], CHRptr[0], 16 * 1024);
memcpy(&_CHRptr[0], &PRGptr[0][400 * 1024], 112 * 1024);
SetupCartCHRMapping(0, _CHRptr, _CHRsize, 0);
AddExState(_CHRptr, _CHRsize, 0, "_CHR");
}
WRAMSIZE = 8192;
WRAM = (uint8*)FCEU_gmalloc(WRAMSIZE);