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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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69
BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Mapper242.cs
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@ -4,9 +4,7 @@ using System.Diagnostics;
namespace BizHawk.Emulation.Consoles.Nintendo
{
//(doesnt work in neshawk; works in fceux)
/*
/*
PCB Class: Unknown
iNES Mapper 242
PRG-ROM: 32KB
@ -15,18 +13,18 @@ CHR-ROM: 16KB
CHR-RAM: None
Battery is not available
mirroring - both
*
* Games:
* Wai Xing Zhan Shi (Ch)
*/
*
* Games:
* Wai Xing Zhan Shi (Ch)
*/
class Mapper242 : NES.NESBoardBase
{
int prg, mirror;
public override bool Configure(NES.EDetectionOrigin origin)
{
//configure
class Mapper242 : NES.NESBoardBase
{
int prg;
public override bool Configure(NES.EDetectionOrigin origin)
{
//configure
switch (Cart.board_type)
{
case "MAPPER242":
@ -34,32 +32,31 @@ mirroring - both
default:
return false;
}
return true;
}
SetMirrorType(NES.NESBoardBase.EMirrorType.Vertical);
return true;
}
public override byte ReadPRG(int addr)
{
return ROM[addr + (prg * 0x8000)];
}
public override byte ReadPRG(int addr)
{
return ROM[addr + (prg * 0x8000)];
}
public override void WritePRG(int addr, byte value)
{
mirror = (value & 0x03);
public override void WritePRG(int addr, byte value)
{
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);
}
}
ser.Sync("prg", ref prg);
}
}
}