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NesHawk - mapper 6 - fix vram and mirroring logic

This commit is contained in:
adelikat 2015-08-22 23:19:55 -04:00
parent 0efd72c409
commit 0e94191b97
1 changed files with 14 additions and 7 deletions
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21
BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/FFE/Mapper006.cs
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@ -5,6 +5,8 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
public class Mapper006 : NES.NESBoardBase
{
private int _reg;
private int _mirr;
private int IRQa, mirr;
private int IRQCount, IRQLatch;
@ -39,15 +41,17 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
// Mirroring
if (addr == 0x2FE || addr == 0x2FF)
{
int mirr = ((addr << 1) & 2) | ((addr >> 4) & 1);
SetMirror(mirr);
_mirr = ((addr << 1) & 2) | ((addr >> 4) & 1);
Sync();
}
// IRQ
else if (addr >= 0x500 && addr <= 0x503)
{
switch (addr)
{
case 0x501:
int zzz = 0;
break;
case 0x502:
break;
@ -61,6 +65,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
public override void WritePRG(int addr, byte value)
{
_reg = value;
Sync();
}
public override byte ReadPRG(int addr)
@ -89,13 +94,15 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
{
VRAM[((_reg & 3) * 0x2000) + (addr & 0x1FFF)] = value;
}
base.WritePPU(addr, value);
else
{
base.WritePPU(addr, value);
}
}
private void SetMirror(int mirr)
private void Sync()
{
switch (mirr)
switch (_mirr)
{
case 0:
SetMirrorType(EMirrorType.OneScreenA);
@ -107,7 +114,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
SetMirrorType(EMirrorType.Vertical);
break;
case 3:
SetMirrorType(EMirrorType.Horizontal);
SetMirrorType(EMirrorType.Vertical);
break;
}
}