forked from sin365/AxibugEmuOnline
290 lines
9.3 KiB
C#
290 lines
9.3 KiB
C#
//////////////////////////////////////////////////////////////////////////
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// Mapper111 Nintendo MMC1 Hack //
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//////////////////////////////////////////////////////////////////////////
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using static VirtualNes.MMU;
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using BYTE = System.Byte;
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using INT = System.Int32;
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namespace VirtualNes.Core
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{
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public class Mapper111 : Mapper
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{
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ushort last_addr;
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BYTE patch;
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BYTE wram_patch;
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BYTE wram_bank;
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BYTE wram_count;
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BYTE[] reg = new byte[4];
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BYTE shift, regbuf;
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public Mapper111(NES parent) : base(parent)
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{
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}
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public override void Reset()
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{
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reg[0] = 0x0C; // D3=1,D2=1
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reg[1] = reg[2] = reg[3] = 0;
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shift = regbuf = 0;
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patch = 0;
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wram_patch = 0;
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if (PROM_16K_SIZE < 32)
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{
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SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
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}
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else
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{
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// For 512K/1M byte Cartridge
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SetPROM_16K_Bank(4, 0);
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SetPROM_16K_Bank(6, 16 - 1);
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patch = 1;
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}
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if (VROM_8K_SIZE != 0)
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{
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SetVROM_8K_Bank(0);
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}
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// Ninja Ryukenden(J)
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nes.SetRenderMethod(EnumRenderMethod.POST_ALL_RENDER);
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}
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//void Mapper111::Write(WORD addr, BYTE data)
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public override void Write(ushort addr, byte data)
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{
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// DEBUGOUT( "MMC1 %04X=%02X\n", addr&0xFFFF,data&0xFF );
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if ((data & 0x80) != 0)
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{
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shift = regbuf = 0;
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reg[0] |= 0x0C; // D3=1,D2=1 残りはリセットされない
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return;
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}
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addr = (ushort)((addr & 0x7FFF) >> 13);
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reg[addr] = data;
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// DEBUGOUT( "MMC1 %d=%02X\n", addr&0xFFFF,regbuf&0xFF );
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if (patch != 1)
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{
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// For Normal Cartridge
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switch (addr)
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{
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case 0:
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if ((reg[0] & 0x02) != 0)
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{
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if ((reg[0] & 0x01) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
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else SetVRAM_Mirror(VRAM_VMIRROR);
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}
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else
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{
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if ((reg[0] & 0x01) != 0) SetVRAM_Mirror(VRAM_MIRROR4H);
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else SetVRAM_Mirror(VRAM_MIRROR4L);
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}
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break;
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case 1:
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// Register #1
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if (VROM_1K_SIZE != 0)
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{
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if ((reg[0] & 0x10) != 0)
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{
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// CHR 4K bank lower($0000-$0FFF)
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SetVROM_4K_Bank(0, reg[1]);
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// CHR 4K bank higher($1000-$1FFF)
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SetVROM_4K_Bank(4, reg[2]);
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}
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else
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{
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// CHR 8K bank($0000-$1FFF)
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SetVROM_8K_Bank(reg[1] >> 1);
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}
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}
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else
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{
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// For Romancia
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if ((reg[0] & 0x10) != 0)
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{
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SetCRAM_4K_Bank(0, reg[1]);
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}
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}
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break;
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case 2:
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// Register #2
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if (VROM_1K_SIZE != 0)
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{
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if ((reg[0] & 0x10) != 0)
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{
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// CHR 4K bank lower($0000-$0FFF)
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SetVROM_4K_Bank(0, reg[1]);
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// CHR 4K bank higher($1000-$1FFF)
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SetVROM_4K_Bank(4, reg[2]);
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}
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else
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{
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// CHR 8K bank($0000-$1FFF)
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SetVROM_8K_Bank(reg[1] >> 1);
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}
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}
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else
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{
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// For Romancia
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if ((reg[0] & 0x10) != 0)
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{
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SetCRAM_4K_Bank(4, reg[2]);
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}
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}
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break;
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case 3:
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if ((reg[0] & 0x08) == 0)
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{
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// PRG 32K bank ($8000-$FFFF)
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SetPROM_32K_Bank(reg[3] >> 1);
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}
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else
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{
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if ((reg[0] & 0x04) != 0)
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{
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// PRG 16K bank ($8000-$BFFF)
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SetPROM_16K_Bank(4, reg[3]);
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SetPROM_16K_Bank(6, PROM_16K_SIZE - 1);
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}
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else
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{
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// PRG 16K bank ($C000-$FFFF)
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SetPROM_16K_Bank(6, reg[3]);
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SetPROM_16K_Bank(4, 0);
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}
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}
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break;
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}
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}
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else
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{
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// For 512K/1M byte Cartridge
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INT PROM_BASE = 0;
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if (PROM_16K_SIZE >= 32)
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{
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PROM_BASE = reg[1] & 0x10;
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}
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// Register #0
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if (addr == 0)
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{
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if ((reg[0] & 0x02) != 0)
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{
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if ((reg[0] & 0x01) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
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else SetVRAM_Mirror(VRAM_VMIRROR);
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}
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else
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{
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if ((reg[0] & 0x01) != 0) SetVRAM_Mirror(VRAM_MIRROR4H);
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else SetVRAM_Mirror(VRAM_MIRROR4L);
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}
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}
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// Register #1
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if (VROM_1K_SIZE != 0)
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{
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if ((reg[0] & 0x10) != 0)
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{
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// CHR 4K bank lower($0000-$0FFF)
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SetVROM_4K_Bank(0, reg[1]);
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}
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else
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{
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// CHR 8K bank($0000-$1FFF)
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SetVROM_8K_Bank(reg[1] >> 1);
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}
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}
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else
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{
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// For Romancia
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if ((reg[0] & 0x10) != 0)
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{
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SetCRAM_4K_Bank(0, reg[1]);
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}
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}
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// Register #2
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if (VROM_1K_SIZE != 0)
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{
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if ((reg[0] & 0x10) != 0)
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{
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// CHR 4K bank higher($1000-$1FFF)
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SetVROM_4K_Bank(4, reg[2]);
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}
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}
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else
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{
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// For Romancia
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if ((reg[0] & 0x10) != 0)
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{
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SetCRAM_4K_Bank(4, reg[2]);
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}
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}
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// Register #3
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if ((reg[0] & 0x08) == 0)
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{
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// PRG 32K bank ($8000-$FFFF)
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SetPROM_32K_Bank((reg[3] & (0xF + PROM_BASE)) >> 1);
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}
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else
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{
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if ((reg[0] & 0x04) != 0)
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{
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// PRG 16K bank ($8000-$BFFF)
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SetPROM_16K_Bank(4, PROM_BASE + (reg[3] & 0x0F));
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if (PROM_16K_SIZE >= 32) SetPROM_16K_Bank(6, PROM_BASE + 16 - 1);
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}
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else
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{
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// PRG 16K bank ($C000-$FFFF)
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SetPROM_16K_Bank(6, PROM_BASE + (reg[3] & 0x0F));
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if (PROM_16K_SIZE >= 32) SetPROM_16K_Bank(4, PROM_BASE);
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}
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}
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}
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}
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//void Mapper111::SaveState(LPBYTE p)
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public override void SaveState(byte[] p)
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{
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p[0] = reg[0];
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p[1] = reg[1];
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p[2] = reg[2];
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p[3] = reg[3];
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p[4] = shift;
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p[5] = regbuf;
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p[6] = wram_bank;
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p[7] = wram_count;
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}
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//void Mapper111::LoadState(LPBYTE p)
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public override void LoadState(byte[] p)
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{
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reg[0] = p[0];
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reg[1] = p[1];
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reg[2] = p[2];
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reg[3] = p[3];
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shift = p[4];
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regbuf = p[5];
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wram_bank = p[6];
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wram_count = p[7];
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}
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public override bool IsStateSave()
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{
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return true;
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}
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}
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}
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