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nes-fix mapper 242

This commit is contained in:
zeromus 2012-04-05 18:55:34 +00:00
parent fd6a1a88da
commit a1cdd5dbfd
1 changed files with 33 additions and 36 deletions
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21
BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Mapper242.cs
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@ -4,8 +4,6 @@ using System.Diagnostics;
namespace BizHawk.Emulation.Consoles.Nintendo namespace BizHawk.Emulation.Consoles.Nintendo
{ {
//(doesnt work in neshawk; works in fceux)
/* /*
PCB Class: Unknown PCB Class: Unknown
iNES Mapper 242 iNES Mapper 242
@ -22,7 +20,7 @@ mirroring - both
class Mapper242 : NES.NESBoardBase class Mapper242 : NES.NESBoardBase
{ {
int prg, mirror; int prg;
public override bool Configure(NES.EDetectionOrigin origin) public override bool Configure(NES.EDetectionOrigin origin)
{ {
@ -34,6 +32,7 @@ mirroring - both
default: default:
return false; return false;
} }
SetMirrorType(NES.NESBoardBase.EMirrorType.Vertical);
return true; return true;
} }
@ -44,22 +43,20 @@ mirroring - both
public override void WritePRG(int addr, byte value) public override void WritePRG(int addr, byte value)
{ {
mirror = (value & 0x03);
prg = (addr >> 3) & 15; prg = (addr >> 3) & 15;
switch (mirror) //fceux had different logic here for the mirroring, but that didnt match with experiments on dragon quest 8 nor disch's docs
{ //i changed it at the same time
case 0: SetMirrorType(NES.NESBoardBase.EMirrorType.Vertical); break; bool mirror = addr.Bit(1);
case 1: SetMirrorType(NES.NESBoardBase.EMirrorType.Horizontal); break; if (mirror)
case 2: SetMirrorType(NES.NESBoardBase.EMirrorType.OneScreenA); break; SetMirrorType(NES.NESBoardBase.EMirrorType.Horizontal);
case 3: SetMirrorType(NES.NESBoardBase.EMirrorType.OneScreenB); break; else
} SetMirrorType(NES.NESBoardBase.EMirrorType.Vertical);
} }
public override void SyncState(Serializer ser) public override void SyncState(Serializer ser)
{ {
base.SyncState(ser); base.SyncState(ser);
ser.Sync("prg", ref prg); ser.Sync("prg", ref prg);
ser.Sync("mirror", ref mirror);
} }
} }
} }