AxibugEmuOnline/AxibugEmuOnline.Client/Assets/VirtualNes.Core/Mapper/Mapper111.cs

292 lines
9.3 KiB
C#

//////////////////////////////////////////////////////////////////////////
// Mapper111 Nintendo MMC1 Hack //
//////////////////////////////////////////////////////////////////////////
using static VirtualNes.MMU;
using static VirtualNes.Core.CPU;
using INT = System.Int32;
using BYTE = System.Byte;
using System;
using Codice.CM.Client.Differences;
namespace VirtualNes.Core
{
public class Mapper111 : Mapper
{
ushort last_addr;
BYTE patch;
BYTE wram_patch;
BYTE wram_bank;
BYTE wram_count;
BYTE[] reg = new byte[4];
BYTE shift, regbuf;
public Mapper111(NES parent) : base(parent)
{
}
public override void Reset()
{
reg[0] = 0x0C; // D3=1,D2=1
reg[1] = reg[2] = reg[3] = 0;
shift = regbuf = 0;
patch = 0;
wram_patch = 0;
if (PROM_16K_SIZE < 32)
{
SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
}
else
{
// For 512K/1M byte Cartridge
SetPROM_16K_Bank(4, 0);
SetPROM_16K_Bank(6, 16 - 1);
patch = 1;
}
if (VROM_8K_SIZE != 0)
{
SetVROM_8K_Bank(0);
}
// Ninja Ryukenden(J)
nes.SetRenderMethod(EnumRenderMethod.POST_ALL_RENDER);
}
//void Mapper111::Write(WORD addr, BYTE data)
public override void Write(ushort addr, byte data)
{
// DEBUGOUT( "MMC1 %04X=%02X\n", addr&0xFFFF,data&0xFF );
if ((data & 0x80) != 0)
{
shift = regbuf = 0;
reg[0] |= 0x0C; // D3=1,D2=1 残りはリセットされない
return;
}
addr = (ushort)((addr & 0x7FFF) >> 13);
reg[addr] = data;
// DEBUGOUT( "MMC1 %d=%02X\n", addr&0xFFFF,regbuf&0xFF );
if (patch != 1)
{
// For Normal Cartridge
switch (addr)
{
case 0:
if ((reg[0] & 0x02) != 0)
{
if ((reg[0] & 0x01) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
else SetVRAM_Mirror(VRAM_VMIRROR);
}
else
{
if ((reg[0] & 0x01) != 0) SetVRAM_Mirror(VRAM_MIRROR4H);
else SetVRAM_Mirror(VRAM_MIRROR4L);
}
break;
case 1:
// Register #1
if (VROM_1K_SIZE != 0)
{
if ((reg[0] & 0x10) != 0)
{
// CHR 4K bank lower($0000-$0FFF)
SetVROM_4K_Bank(0, reg[1]);
// CHR 4K bank higher($1000-$1FFF)
SetVROM_4K_Bank(4, reg[2]);
}
else
{
// CHR 8K bank($0000-$1FFF)
SetVROM_8K_Bank(reg[1] >> 1);
}
}
else
{
// For Romancia
if ((reg[0] & 0x10) != 0)
{
SetCRAM_4K_Bank(0, reg[1]);
}
}
break;
case 2:
// Register #2
if (VROM_1K_SIZE != 0)
{
if ((reg[0] & 0x10) != 0)
{
// CHR 4K bank lower($0000-$0FFF)
SetVROM_4K_Bank(0, reg[1]);
// CHR 4K bank higher($1000-$1FFF)
SetVROM_4K_Bank(4, reg[2]);
}
else
{
// CHR 8K bank($0000-$1FFF)
SetVROM_8K_Bank(reg[1] >> 1);
}
}
else
{
// For Romancia
if ((reg[0] & 0x10) != 0)
{
SetCRAM_4K_Bank(4, reg[2]);
}
}
break;
case 3:
if ((reg[0] & 0x08) == 0)
{
// PRG 32K bank ($8000-$FFFF)
SetPROM_32K_Bank(reg[3] >> 1);
}
else
{
if ((reg[0] & 0x04) != 0)
{
// PRG 16K bank ($8000-$BFFF)
SetPROM_16K_Bank(4, reg[3]);
SetPROM_16K_Bank(6, PROM_16K_SIZE - 1);
}
else
{
// PRG 16K bank ($C000-$FFFF)
SetPROM_16K_Bank(6, reg[3]);
SetPROM_16K_Bank(4, 0);
}
}
break;
}
}
else
{
// For 512K/1M byte Cartridge
INT PROM_BASE = 0;
if (PROM_16K_SIZE >= 32)
{
PROM_BASE = reg[1] & 0x10;
}
// Register #0
if (addr == 0)
{
if ((reg[0] & 0x02) != 0)
{
if ((reg[0] & 0x01) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
else SetVRAM_Mirror(VRAM_VMIRROR);
}
else
{
if ((reg[0] & 0x01) != 0) SetVRAM_Mirror(VRAM_MIRROR4H);
else SetVRAM_Mirror(VRAM_MIRROR4L);
}
}
// Register #1
if (VROM_1K_SIZE != 0)
{
if ((reg[0] & 0x10) != 0)
{
// CHR 4K bank lower($0000-$0FFF)
SetVROM_4K_Bank(0, reg[1]);
}
else
{
// CHR 8K bank($0000-$1FFF)
SetVROM_8K_Bank(reg[1] >> 1);
}
}
else
{
// For Romancia
if ((reg[0] & 0x10) != 0)
{
SetCRAM_4K_Bank(0, reg[1]);
}
}
// Register #2
if (VROM_1K_SIZE != 0)
{
if ((reg[0] & 0x10) != 0)
{
// CHR 4K bank higher($1000-$1FFF)
SetVROM_4K_Bank(4, reg[2]);
}
}
else
{
// For Romancia
if ((reg[0] & 0x10) != 0)
{
SetCRAM_4K_Bank(4, reg[2]);
}
}
// Register #3
if ((reg[0] & 0x08) == 0)
{
// PRG 32K bank ($8000-$FFFF)
SetPROM_32K_Bank((reg[3] & (0xF + PROM_BASE)) >> 1);
}
else
{
if ((reg[0] & 0x04) != 0)
{
// PRG 16K bank ($8000-$BFFF)
SetPROM_16K_Bank(4, PROM_BASE + (reg[3] & 0x0F));
if (PROM_16K_SIZE >= 32) SetPROM_16K_Bank(6, PROM_BASE + 16 - 1);
}
else
{
// PRG 16K bank ($C000-$FFFF)
SetPROM_16K_Bank(6, PROM_BASE + (reg[3] & 0x0F));
if (PROM_16K_SIZE >= 32) SetPROM_16K_Bank(4, PROM_BASE);
}
}
}
}
//void Mapper111::SaveState(LPBYTE p)
public override void SaveState(byte[] p)
{
p[0] = reg[0];
p[1] = reg[1];
p[2] = reg[2];
p[3] = reg[3];
p[4] = shift;
p[5] = regbuf;
p[6] = wram_bank;
p[7] = wram_count;
}
//void Mapper111::LoadState(LPBYTE p)
public override void LoadState(byte[] p)
{
reg[0] = p[0];
reg[1] = p[1];
reg[2] = p[2];
reg[3] = p[3];
shift = p[4];
regbuf = p[5];
wram_bank = p[6];
wram_count = p[7];
}
public override bool IsStateSave()
{
return true;
}
}
}