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Start mapper 82 - PRG mapping working, needs chr mapping

This commit is contained in:
adelikat 2012-03-05 18:06:30 +00:00
parent 2c95e08392
commit 5a76c282ac
2 changed files with 173 additions and 8 deletions
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16
BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Taito_X1_005.cs
View File

@ -95,21 +95,21 @@ PRG Setup:
chr_regs_1k[0] = value;
break;
case 0x1EF1:
chr_regs_1k[1] = value;
chr_regs_1k[2] = value;
break;
case 0x1EF2:
chr_regs_1k[2] = value;
break;
case 0x1EF3:
chr_regs_1k[3] = value;
break;
case 0x1EF4:
chr_regs_1k[4] = value;
break;
case 0X1EF5:
case 0x1EF3:
chr_regs_1k[5] = value;
break;
case 0x1EF4:
chr_regs_1k[6] = value;
break;
case 0X1EF5:
chr_regs_1k[7] = value;
break;
case 0x1EFA: //PRG Reg 0
case 0x1EFB:

165
BizHawk.Emulation/Consoles/Nintendo/NES/Boards/Taito_X1_017.cs Normal file
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@ -0,0 +1,165 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace BizHawk.Emulation.Consoles.Nintendo
{
class Taito_X1_017 : NES.NESBoardBase
{
/*
ines Mapper 82
http://wiki.nesdev.com/w/index.php/INES_Mapper_082
* Example Games:
--------------------------
SD Keiji - Blader
Kyuukyoku Harikiri Stadium
Notes:
---------------------------
Regs appear at $7EFx, I'm unsure whether or not PRG-RAM can exist at $6000-7FFF
Registers:
---------------------------
$7EF0-7EF5: CHR Regs
$7EF6: [.... ..CM] CHR Mode/Mirroring
C = CHR Mode select
M = Mirroring:
0 = Horz
1 = Vert
$7EFA: [PPPP PP..] PRG Reg 0 (8k @ $8000)
$7EFB: [PPPP PP..] PRG Reg 1 (8k @ $A000)
$7EFC: [PPPP PP..] PRG Reg 2 (8k @ $C000)
CHR Setup:
---------------------------
$0000 $0400 $0800 $0C00 $1000 $1400 $1800 $1C00
+---------------+---------------+-------+-------+-------+-------+
CHR Mode 0: | <$7EF0> | <$7EF1> | $7EF2 | $7EF3 | $7EF4 | $7EF5 |
+---------------+---------------+---------------+---------------+
CHR Mode 1: | $7EF2 | $7EF3 | $7EF4 | $7EF5 | <$7EF0> | <$7EF1> |
+-------+-------+-------+-------+---------------+---------------+
PRG Setup:
---------------------------
$8000 $A000 $C000 $E000
+-------+-------+-------+-------+
| $7EFA | $7EFB | $7EFC | { -1} |
+-------+-------+-------+-------+
Note: remember that the low 2 bits are not used (right-shift written values by 2)
*/
int prg_bank_mask, chr_bank_mask;
ByteBuffer prg_regs_8k = new ByteBuffer(4);
ByteBuffer chr_regs_1k = new ByteBuffer(8);
bool ChrMode;
public override void Dispose()
{
base.Dispose();
chr_regs_1k.Dispose();
prg_regs_8k.Dispose();
}
public override void SyncState(Serializer ser)
{
base.SyncState(ser);
ser.Sync("prg_regs_8k", ref prg_regs_8k);
ser.Sync("chr_regs_1k", ref chr_regs_1k);
ser.Sync("ChrMOde", ref ChrMode);
}
public override bool Configure(NES.EDetectionOrigin origin)
{
//configure
switch (Cart.board_type)
{
case "TAITO-X1-017":
break;
default:
return false;
}
SetMirrorType(EMirrorType.Vertical);
chr_bank_mask = Cart.chr_size / 2 - 1;
prg_bank_mask = Cart.prg_size / 8 - 1;
prg_regs_8k[3] = 0xFF;
return true;
}
public override void WriteWRAM(int addr, byte value)
{
switch (addr)
{
case 0x1EF0:
chr_regs_1k[0] = value;
break;
case 0x1EF1:
chr_regs_1k[1] = value;
break;
case 0x1EF2:
chr_regs_1k[2] = value;
break;
case 0x1EF3:
chr_regs_1k[3] = value;
break;
case 0x1EF4:
chr_regs_1k[4] = value;
break;
case 0X1EF5:
chr_regs_1k[5] = value;
break;
case 0x1EF6:
ChrMode = value.Bit(1);
if (value.Bit(0))
SetMirrorType(EMirrorType.Vertical);
else
SetMirrorType(EMirrorType.Horizontal);
break;
case 0x1EFA:
prg_regs_8k[0] = (byte)(value >> 2);
break;
case 0x1EFB:
prg_regs_8k[1] = (byte)(value >> 2);
break;
case 0x1EFC:
prg_regs_8k[1] = (byte)(value >> 2);
break;
}
}
public override byte ReadPRG(int addr)
{
int bank_8k = addr >> 13;
int ofs = addr & ((1 << 13) - 1);
bank_8k = prg_regs_8k[bank_8k];
bank_8k &= prg_bank_mask;
addr = (bank_8k << 13) | ofs;
return ROM[addr];
}
public override byte ReadPPU(int addr)
{
int bank_2k = addr >> 11;
int ofs = addr & ((1 << 11) - 1);
bank_2k = chr_regs_1k[bank_2k];
bank_2k &= chr_bank_mask;
addr = (bank_2k << 11) | ofs;
return VROM[addr];
}
}
}