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Merge pull request #517 from negativeExponent/m235

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m235: Update support for 150-in-1 and 260-in-1 with Contra carts
This commit is contained in:
LibretroAdmin
2022-06-09 12:28:43 +01:00
committed by GitHub
parent b3c35b6515 cc4696ee62
commit 69613f284f
1 changed files with 13 additions and 29 deletions
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42
src/boards/235.c
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@@ -25,22 +25,24 @@ static uint8 *CHRRAM;
static uint32 CHRRAMSIZE;
static uint16 cmdreg;
static uint8 unrom, reg, type, openbus;
static uint8 unrom, reg, openbus;
static uint32 PRGROMSize;
static SFORMAT StateRegs[] =
{
{ &cmdreg, 2 | FCEUSTATE_RLSB, "CREG" },
{ &unrom, 1, "UNRM" },
{ &reg, 1, "UNRG" },
{ &type, 1, "TYPE" },
{ &openbus, 1, "OPNB" },
{ 0 }
};
static void Sync(void) {
if (type && unrom) {
setprg16(0x8000, 0x80 | (reg & 7));
setprg16(0xC000, 0x80 | 7);
if (unrom) {
uint8 PRGPageSize = PRGROMSize / 16384;
setprg16(0x8000, (PRGPageSize & 0xC0) | (reg & 7));
setprg16(0xC000, (PRGPageSize & 0xC0) | 7);
setchr8(0);
setmirror(MI_V);
} else {
@@ -49,7 +51,7 @@ static void Sync(void) {
setmirror(MI_0);
else
setmirror(((cmdreg >> 13) & 1) ^ 1);
if (bank >= PRGsize[0] / 32768)
if (bank >= PRGROMSize / 32768)
openbus = 1;
else if (cmdreg & 0x800) {
setprg16(0x8000, (bank << 1) | ((cmdreg >> 12) & 1));
@@ -74,15 +76,11 @@ static DECLFW(M235Write) {
Sync();
}
static void M235Close(void) {
if (CHRRAM)
FCEU_free(CHRRAM);
CHRRAM = NULL;
}
static void M235Reset(void) {
cmdreg = 0;
unrom = (unrom + type) & 1;
reg = 0;
if (PRGROMSize & 0x20000)
unrom = (unrom + 1) & 1;
Sync();
}
@@ -90,6 +88,7 @@ static void M235Power(void) {
SetWriteHandler(0x8000, 0xFFFF, M235Write);
SetReadHandler(0x8000, 0xFFFF, M235Read);
cmdreg = 0;
reg = 0;
Sync();
}
@@ -100,22 +99,7 @@ static void M235Restore(int version) {
void Mapper235_Init(CartInfo *info) {
info->Reset = M235Reset;
info->Power = M235Power;
info->Close = M235Close;
GameStateRestore = M235Restore;
AddExState(&StateRegs, ~0, 0, 0);
/* some nes 2.0 header do can have no chr-ram.
* one such cart is 210-in-1 and Contra 4-in-1 (212-in-1,212 Hong Kong,Reset Based)(Unl).nes (0x745A6791)
*/
if (CHRsize[0] == 0) {
CHRRAMSIZE = 8192;
CHRRAM = (uint8*)FCEU_gmalloc(CHRRAMSIZE);
SetupCartCHRMapping(0, CHRRAM, CHRRAMSIZE, 1);
AddExState(CHRRAM, CHRRAMSIZE, 0, "CRAM");
}
type = 0;
/* carts with unrom game, reset-based */
if ((info->CRC32) == 0x745A6791) /* 210-in-1 and Contra 4-in-1 (212-in-1,212 Hong Kong,Reset Based)(Unl).nes */
type = 1;
PRGROMSize = info->PRGRomSize;
}