122 lines
3.1 KiB
C#
122 lines
3.1 KiB
C#
//////////////////////////////////////////////////////////////////////////
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// Mapper032 Irem G101 //
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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 Mapper032 : Mapper
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{
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BYTE patch;
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BYTE reg;
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public Mapper032(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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patch = 0;
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reg = 0;
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SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
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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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uint crc = nes.rom.GetPROM_CRC();
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// For Major League(J)
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if (crc == 0xc0fed437)
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{
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patch = 1;
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}
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// For Ai Sensei no Oshiete - Watashi no Hoshi(J)
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if (crc == 0xfd3fc292)
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{
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SetPROM_32K_Bank(30, 31, 30, 31);
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}
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}
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//void Mapper032::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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switch (addr & 0xF000)
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{
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case 0x8000:
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if ((reg & 0x02) != 0)
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{
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SetPROM_8K_Bank(6, data);
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}
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else
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{
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SetPROM_8K_Bank(4, data);
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}
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break;
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case 0x9000:
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reg = data;
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if ((data & 0x01) != 0) SetVRAM_Mirror(VRAM_HMIRROR);
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else SetVRAM_Mirror(VRAM_VMIRROR);
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break;
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case 0xA000:
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SetPROM_8K_Bank(5, data);
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break;
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}
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switch (addr & 0xF007)
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{
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case 0xB000:
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case 0xB001:
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case 0xB002:
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case 0xB003:
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case 0xB004:
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case 0xB005:
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SetVROM_1K_Bank((byte)(addr & 0x0007), data);
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break;
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case 0xB006:
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SetVROM_1K_Bank(6, data);
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if (patch != 0 && ((data & 0x40) != 0))
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{
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SetVRAM_Mirror(0, 0, 0, 1);
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}
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break;
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case 0xB007:
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SetVROM_1K_Bank(7, data);
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if (patch != 0 && ((data & 0x40) != 0))
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{
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SetVRAM_Mirror(0, 0, 0, 0);
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}
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break;
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}
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}
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//void Mapper032::SaveState(LPBYTE p)
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public override void SaveState(byte[] p)
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{
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p[0] = reg;
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}
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//void Mapper032::LoadState(LPBYTE p)
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public override void LoadState(byte[] p)
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{
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reg = p[0];
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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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