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mmc5 fix

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mmc5 fix taken from fceux source code to handle correctly the register
$5130 in fceumm. Now we can play games like Legend of Link nes hack that
need this fix.
This commit is contained in:
Jose Ernesto Ramirez Ramirez
2015-06-27 18:04:58 -05:00
parent 8128c81539
commit d4fa032402
4 changed files with 7 additions and 2 deletions
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6
src/boards/mmc5.c
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@@ -369,7 +369,7 @@ static DECLFW(Mapper5_write) {
case 0x5126:
case 0x5127:
mmc5ABMode = 0;
CHRBanksA[A & 7] = V;
CHRBanksA[A & 7] = V | ((MMC50x5130 & 0x3) << 8);
MMC5CHRA();
break;
case 0x5128:
@@ -377,9 +377,10 @@ static DECLFW(Mapper5_write) {
case 0x512a:
case 0x512b:
mmc5ABMode = 1;
CHRBanksB[A & 3] = V;
CHRBanksB[A & 3] = V | ((MMC50x5130 & 0x3) << 8);
MMC5CHRB();
break;
case 0x5130: MMC50x5130 = V; break;
case 0x5200: MMC5HackSPMode = V; break;
case 0x5201: MMC5HackSPScroll = (V >> 3) & 0x1F; break;
case 0x5202: MMC5HackSPPage = V & 0x3F; break;
@@ -756,6 +757,7 @@ static void GenMMC5_Init(CartInfo *info, int wsize, int battery) {
AddExState(&MMC5HackSPMode, 1, 0, "SPLM");
AddExState(&MMC5HackSPScroll, 1, 0, "SPLS");
AddExState(&MMC5HackSPPage, 1, 0, "SPLP");
AddExState(&MMC50x5130, 1, 0, "5130");
AddExState(MMC5_StateRegs, ~0, 0, 0);
MMC5WRAMsize = wsize / 8;