71 lines
2.0 KiB
C#
71 lines
2.0 KiB
C#
//////////////////////////////////////////////////////////////////////////
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// Mapper002 UNROM //
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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 Mapper002 : Mapper
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{
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BYTE patch;
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public Mapper002(NES parent) : base(parent) { }
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public override void Reset()
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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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patch = 0;
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uint crc = nes.rom.GetPROM_CRC();
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// if( crc == 0x322c9b09 ) { // Metal Gear (Alt)(J)
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//// nes.SetFrameIRQmode( FALSE );
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// }
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// if( crc == 0xe7a3867b ) { // Dragon Quest 2(Alt)(J)
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// nes.SetFrameIRQmode( FALSE );
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// }
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//// if( crc == 0x9622fbd9 ) { // Ballblazer(J)
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//// patch = 0;
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//// }
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if (crc == 0x8c3d54e8 // Ikari(J)
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|| crc == 0x655efeed // Ikari Warriors(U)
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|| crc == 0x538218b2)
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{ // Ikari Warriors(E)
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patch = 1;
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}
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if (crc == 0xb20c1030)
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{ // Shanghai(J)(original)
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patch = 2;
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}
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}
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//void Mapper002::WriteLow(WORD addr, BYTE data)
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public override void WriteLow(ushort addr, byte data)
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{
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if (!nes.rom.IsSAVERAM())
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{
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if (addr >= 0x5000 && patch == 1)
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SetPROM_16K_Bank(4, data);
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}
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else
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{
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base.WriteLow(addr, data);
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}
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}
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//void Mapper002::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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if (patch != 2)
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SetPROM_16K_Bank(4, data);
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else
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SetPROM_16K_Bank(4, data >> 4);
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}
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}
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}
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