AxibugEmuOnline/AxibugEmuOnline.Client.Transplant/Assets/VirtualNes.Core/Mapper/Mapper002.cs

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//////////////////////////////////////////////////////////////////////////
// Mapper002 UNROM //
//////////////////////////////////////////////////////////////////////////
using static VirtualNes.MMU;
using BYTE = System.Byte;
namespace VirtualNes.Core
{
public class Mapper002 : Mapper
{
BYTE patch;
public Mapper002(NES parent) : base(parent) { }
public override void Reset()
{
SetPROM_32K_Bank(0, 1, PROM_8K_SIZE - 2, PROM_8K_SIZE - 1);
patch = 0;
uint crc = nes.rom.GetPROM_CRC();
// if( crc == 0x322c9b09 ) { // Metal Gear (Alt)(J)
//// nes.SetFrameIRQmode( FALSE );
// }
// if( crc == 0xe7a3867b ) { // Dragon Quest 2(Alt)(J)
// nes.SetFrameIRQmode( FALSE );
// }
//// if( crc == 0x9622fbd9 ) { // Ballblazer(J)
//// patch = 0;
//// }
if (crc == 0x8c3d54e8 // Ikari(J)
|| crc == 0x655efeed // Ikari Warriors(U)
|| crc == 0x538218b2)
{ // Ikari Warriors(E)
patch = 1;
}
if (crc == 0xb20c1030)
{ // Shanghai(J)(original)
patch = 2;
}
}
//void Mapper002::WriteLow(WORD addr, BYTE data)
public override void WriteLow(ushort addr, byte data)
{
if (!nes.rom.IsSAVERAM())
{
if (addr >= 0x5000 && patch == 1)
SetPROM_16K_Bank(4, data);
}
else
{
base.WriteLow(addr, data);
}
}
//void Mapper002::Write(WORD addr, BYTE data)
public override void Write(ushort addr, byte data)
{
if (patch != 2)
SetPROM_16K_Bank(4, data);
else
SetPROM_16K_Bank(4, data >> 4);
}
}
}