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fix crash by nes 2.0 boards with no chrram and no chrrom

This commit is contained in:
zeromus 2016-12-11 23:40:05 +00:00
parent f292acee4f
commit ebcc1fdc0c
1 changed files with 13 additions and 3 deletions
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12
trunk/src/ines.cpp
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@ -855,7 +855,7 @@ int iNESLoad(const char *name, FCEUFILE *fp, int OverwriteVidMode) {
FCEU_printf(" Total VRAM size: %d\n", iNESCart.vram_size + iNESCart.battery_vram_size);
if(head.ROM_type & 2)
{
FCEU_printf(" WRAM backked by battery: %d\n", iNESCart.battery_wram_size);
FCEU_printf(" WRAM backed by battery: %d\n", iNESCart.battery_wram_size);
FCEU_printf(" VRAM backed by battery: %d\n", iNESCart.battery_vram_size);
}
}
@ -1015,9 +1015,19 @@ static int iNES_Init(int num) {
FCEU_MemoryRand(VROM, CHRRAMSize);
UNIFchrrama = VROM;
if(CHRRAMSize == 0)
{
//probably a mistake.
//but (for chrram): "Use of $00 with no CHR ROM implies that the game is wired to map nametable memory in CHR space. The value $00 MUST NOT be used if a mapper isn't defined to allow this. "
//well, i'm not going to do that now. we'll save it for when it's needed
//"it's only mapper 218 and no other mappers"
}
else
{
SetupCartCHRMapping(0, VROM, CHRRAMSize, 1);
AddExState(VROM, CHRRAMSize, 0, "CHRR");
}
}
if (head.ROM_type & 8)
AddExState(ExtraNTARAM, 2048, 0, "EXNR");
tmp->init(&iNESCart);