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neshawk - fix loading q-boy unif

This commit is contained in:
zeromus 2014-12-14 00:16:05 +00:00
parent 5d59e00c20
commit 70091c7780
2 changed files with 13 additions and 1 deletions
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9
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/Sachen8259.cs
View File

@ -50,7 +50,11 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
return false; return false;
} }
Cart.wram_size = 0; // cart responds to regs in 6000:7fff Cart.wram_size = 0; // cart responds to regs in 6000:7fff
Cart.vram_size = 0;
//zero 13-dec-2014 - Q-boy is example of game with vram, apparently.
//lets only clear vram if theres a chr rom
if(Cart.chr_size != 0)
Cart.vram_size = 0;
shiftmask = (1 << shiftout) - 1; shiftmask = (1 << shiftout) - 1;
prg_bank_mask_32k = Cart.prg_size / 32 - 1; prg_bank_mask_32k = Cart.prg_size / 32 - 1;
@ -131,6 +135,9 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
{ {
if (addr < 0x2000) if (addr < 0x2000)
{ {
if(VROM == null)
return base.ReadPPU(addr);
int idx = addr >> 11; int idx = addr >> 11;
// in addition to fixing V-mirroring, simple fixes us to 1 bank // in addition to fixing V-mirroring, simple fixes us to 1 bank
// this means for type C, simple has 1 8KiB chr bank // this means for type C, simple has 1 8KiB chr bank

5
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/NES.cs
View File

@ -630,6 +630,11 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
{ {
LoadWriteLine("Using information from UNIF header"); LoadWriteLine("Using information from UNIF header");
choice = unif.CartInfo; choice = unif.CartInfo;
//ok, i have this Q-Boy rom with no VROM and no VRAM.
//looks like FCEUX policy is to allocate 8KB of chr ram no matter what UNLESS certain flags are set.
//we'll let individual boards override that and set 8KB here
choice.vram_size = 8;
//(do we need to suppress this in case theres a CHR rom? probably not. nes board base will use ram if no rom is available)
origin = EDetectionOrigin.UNIF; origin = EDetectionOrigin.UNIF;
} }
if (iNesHeaderInfo != null) if (iNesHeaderInfo != null)