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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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67
BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Mapper242.cs
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@ -4,9 +4,7 @@ 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
PRG-ROM: 32KB PRG-ROM: 32KB
@ -15,18 +13,18 @@ CHR-ROM: 16KB
CHR-RAM: None CHR-RAM: None
Battery is not available Battery is not available
mirroring - both mirroring - both
* *
* Games: * Games:
* Wai Xing Zhan Shi (Ch) * Wai Xing Zhan Shi (Ch)
*/ */
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)
{ {
//configure //configure
switch (Cart.board_type) switch (Cart.board_type)
{ {
case "MAPPER242": case "MAPPER242":
@ -34,32 +32,31 @@ mirroring - both
default: default:
return false; return false;
} }
return true; SetMirrorType(NES.NESBoardBase.EMirrorType.Vertical);
} return true;
}
public override byte ReadPRG(int addr) public override byte ReadPRG(int addr)
{ {
return ROM[addr + (prg * 0x8000)]; return ROM[addr + (prg * 0x8000)];
} }
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); }
} }
}
} }