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Mapper165: implement peekppu. fixes some visual glitching when using nametable viewer. Fire Emblem (Ch)

This commit is contained in:
goyuken 2012-11-02 23:51:38 +00:00
parent 48bb76820e
commit f8f4fa6967
1 changed files with 18 additions and 0 deletions
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18
BizHawk.Emulation/Consoles/Nintendo/NES/Boards/MMC3_family/Mapper165.cs
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@ -39,6 +39,24 @@ namespace BizHawk.Emulation.Consoles.Nintendo
ser.Sync("latch1", ref latch1); ser.Sync("latch1", ref latch1);
} }
// same as ReadPPU, but doesn't process latches
public override byte PeekPPU(int addr)
{
byte ret;
if (addr < 0x2000)
{
int bank = mmc3.regs[addr < 0x1000 ? latch0 ? 1 : 0 : latch1 ? 4 : 2];
if (bank == 0)
ret = VRAM[addr & 0xfff];
else
ret = VROM[(addr & 0xfff) + (((bank >> 2) & real_chr_mask) << 12)];
}
else
ret = base.ReadPPU(addr);
return ret;
}
public override byte ReadPPU(int addr) public override byte ReadPPU(int addr)
{ {
byte ret; byte ret;