84 lines
1.5 KiB
C++
84 lines
1.5 KiB
C++
//////////////////////////////////////////////////////////////////////////
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// Mapper032 Irem G101 //
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//////////////////////////////////////////////////////////////////////////
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void Mapper032::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 ) {
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SetVROM_8K_Bank( 0 );
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}
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DWORD crc = nes->rom->GetPROM_CRC();
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// For Major League(J)
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if( crc == 0xc0fed437 ) {
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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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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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{
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switch( addr & 0xF000 ) {
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case 0x8000:
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if( reg & 0x02 ) {
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SetPROM_8K_Bank( 6, data );
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} else {
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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 ) 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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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( 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 && (data & 0x40) ) {
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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 && (data & 0x40) ) {
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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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{
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p[0] = reg;
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}
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void Mapper032::LoadState( LPBYTE p )
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{
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reg = p[0];
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}
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