ShuriZma
/
BizHawk
mirror of https://github.com/TASEmulators/BizHawk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Mapper242.cs
View File

@ -4,8 +4,6 @@ using System.Diagnostics;
namespace BizHawk.Emulation.Consoles.Nintendo
{
//(doesnt work in neshawk; works in fceux)
/*
PCB Class: Unknown
iNES Mapper 242
@ -22,7 +20,7 @@ mirroring - both
class Mapper242 : NES.NESBoardBase
{
int prg, mirror;
int prg;
public override bool Configure(NES.EDetectionOrigin origin)
{
@ -34,6 +32,7 @@ mirroring - both
default:
return false;
}
SetMirrorType(NES.NESBoardBase.EMirrorType.Vertical);
return true;
}
@ -44,22 +43,20 @@ mirroring - both
public override void WritePRG(int addr, byte value)
{
mirror = (value & 0x03);
prg = (addr >> 3) & 15;
switch (mirror)
{
case 0: SetMirrorType(NES.NESBoardBase.EMirrorType.Vertical); break;
case 1: SetMirrorType(NES.NESBoardBase.EMirrorType.Horizontal); break;
case 2: SetMirrorType(NES.NESBoardBase.EMirrorType.OneScreenA); break;
case 3: SetMirrorType(NES.NESBoardBase.EMirrorType.OneScreenB); break;
}
//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
bool mirror = addr.Bit(1);
if (mirror)
SetMirrorType(NES.NESBoardBase.EMirrorType.Horizontal);
else
SetMirrorType(NES.NESBoardBase.EMirrorType.Vertical);
}
public override void SyncState(Serializer ser)
{
base.SyncState(ser);
ser.Sync("prg", ref prg);
ser.Sync("mirror", ref mirror);
}
}
}