135 lines
2.4 KiB
C++
135 lines
2.4 KiB
C++
//////////////////////////////////////////////////////////////////////////
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// Mapper065 Irem H3001 //
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//////////////////////////////////////////////////////////////////////////
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void Mapper065::Reset()
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{
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patch = 0;
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// Kaiketsu Yanchamaru 3(J) & (C)
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if( (nes->rom->GetPROM_CRC() == 0xe30b7f64)
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|| (nes->rom->GetPROM_CRC() == 0x5f17f55e) ) {
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patch = 1;
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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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if( VROM_8K_SIZE ) {
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SetVROM_8K_Bank( 0 );
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}
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irq_enable = 0;
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irq_counter = 0;
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}
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void Mapper065::Write( WORD addr, BYTE data )
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{
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switch( addr ) {
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case 0x8000:
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SetPROM_8K_Bank( 4, data );
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break;
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case 0x9000:
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if( !patch ) {
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if( data & 0x40 ) SetVRAM_Mirror( VRAM_VMIRROR );
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else SetVRAM_Mirror( VRAM_HMIRROR );
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}
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break;
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case 0x9001:
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if( patch ) {
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if( data & 0x80 ) SetVRAM_Mirror( VRAM_HMIRROR );
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else SetVRAM_Mirror( VRAM_VMIRROR );
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}
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break;
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case 0x9003:
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if( !patch ) {
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irq_enable = data & 0x80;
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nes->cpu->ClrIRQ( IRQ_MAPPER );
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}
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break;
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case 0x9004:
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if( !patch ) {
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irq_counter = irq_latch;
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}
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break;
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case 0x9005:
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if( patch ) {
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irq_counter = (BYTE)(data<<1);
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irq_enable = data;
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nes->cpu->ClrIRQ( IRQ_MAPPER );
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} else {
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irq_latch = (irq_latch & 0x00FF)|((INT)data<<8);
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}
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break;
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case 0x9006:
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if( patch ) {
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irq_enable = 1;
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} else {
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irq_latch = (irq_latch & 0xFF00)|data;
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}
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break;
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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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case 0xB006:
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case 0xB007:
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SetVROM_1K_Bank( addr & 0x0007, data );
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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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case 0xC000:
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SetPROM_8K_Bank( 6, data );
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break;
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}
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}
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void Mapper065::HSync( INT scanline )
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{
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if( patch ) {
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if( irq_enable ) {
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if( irq_counter == 0 ) {
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// nes->cpu->IRQ_NotPending();
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nes->cpu->SetIRQ( IRQ_MAPPER );
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} else {
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irq_counter--;
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}
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}
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}
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}
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void Mapper065::Clock( INT cycles )
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{
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if( !patch ) {
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if( irq_enable ) {
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if( irq_counter <= 0 ) {
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// nes->cpu->IRQ_NotPending();
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nes->cpu->SetIRQ( IRQ_MAPPER );
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} else {
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irq_counter -= cycles;
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}
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}
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}
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}
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void Mapper065::SaveState( LPBYTE p )
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{
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p[0] = irq_enable;
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*(INT*)&p[1] = irq_counter;
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*(INT*)&p[5] = irq_latch;
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}
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void Mapper065::LoadState( LPBYTE p )
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{
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irq_enable = p[0];
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irq_counter = *(INT*)&p[1];
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irq_latch = *(INT*)&p[5];
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}
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