forked from sin365/AxibugEmuOnline
80 lines
2.4 KiB
C#
80 lines
2.4 KiB
C#
//////////////////////////////////////////////////////////////////////////
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// Mapper225 72-in-1 //
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//////////////////////////////////////////////////////////////////////////
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using static VirtualNes.MMU;
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using BYTE = System.Byte;
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namespace VirtualNes.Core
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{
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public class Mapper225 : Mapper
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{
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public Mapper225(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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SetPROM_32K_Bank(0, 1, 2, 3);
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if (VROM_1K_SIZE != 0)
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{
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SetVROM_8K_Bank(0);
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}
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}
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//void Mapper225::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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BYTE prg_bank = (byte)((addr & 0x0F80) >> 7);
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BYTE chr_bank = (byte)(addr & 0x003F);
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SetVROM_1K_Bank(0, (chr_bank * 8 + 0));
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SetVROM_1K_Bank(1, (chr_bank * 8 + 1));
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SetVROM_1K_Bank(2, (chr_bank * 8 + 2));
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SetVROM_1K_Bank(3, (chr_bank * 8 + 3));
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SetVROM_1K_Bank(4, (chr_bank * 8 + 4));
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SetVROM_1K_Bank(5, (chr_bank * 8 + 5));
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SetVROM_1K_Bank(6, (chr_bank * 8 + 6));
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SetVROM_1K_Bank(7, (chr_bank * 8 + 7));
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if ((addr & 0x2000) != 0)
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{
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SetVRAM_Mirror(VRAM_HMIRROR);
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}
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else
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{
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SetVRAM_Mirror(VRAM_VMIRROR);
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}
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if ((addr & 0x1000) != 0)
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{
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// 16KBbank
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if ((addr & 0x0040) != 0)
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{
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SetPROM_8K_Bank(4, (prg_bank * 4 + 2));
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SetPROM_8K_Bank(5, (prg_bank * 4 + 3));
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SetPROM_8K_Bank(6, (prg_bank * 4 + 2));
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SetPROM_8K_Bank(7, (prg_bank * 4 + 3));
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}
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else
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{
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SetPROM_8K_Bank(4, (prg_bank * 4 + 0));
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SetPROM_8K_Bank(5, (prg_bank * 4 + 1));
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SetPROM_8K_Bank(6, (prg_bank * 4 + 0));
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SetPROM_8K_Bank(7, (prg_bank * 4 + 1));
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}
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}
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else
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{
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SetPROM_8K_Bank(4, (prg_bank * 4 + 0));
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SetPROM_8K_Bank(5, (prg_bank * 4 + 1));
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SetPROM_8K_Bank(6, (prg_bank * 4 + 2));
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SetPROM_8K_Bank(7, (prg_bank * 4 + 3));
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}
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}
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}
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}
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