139 lines
3.1 KiB
C++
139 lines
3.1 KiB
C++
//////////////////////////////////////////////////////////////////////////
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// Mapper069 SunSoft FME-7 //
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//////////////////////////////////////////////////////////////////////////
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void Mapper069::Reset()
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{
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reg = 0;
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irq_enable = 0;
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irq_counter = 0;
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SetPROM_32K_Bank( 0, 1, PROM_8K_SIZE-2, PROM_8K_SIZE-1 );
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if( VROM_1K_SIZE ) {
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SetVROM_8K_Bank( 0 );
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}
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nes->apu->SelectExSound(32);
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nes->SetIrqType( NES::IRQ_CLOCK );
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patch = 0;
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DWORD crc = nes->rom->GetPROM_CRC();
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if( crc == 0xfeac6916 ) { // Honoo no Toukyuuji - Dodge Danpei 2(J)
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// nes->SetIrqType( NES::IRQ_HSYNC );
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nes->SetRenderMethod( NES::TILE_RENDER );
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}
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if( crc == 0xad28aef6 ) { // Dynamite Batman(J) / Dynamite Batman - Return of the Joker(U)
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patch = 1;
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}
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}
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void Mapper069::Write( WORD addr, BYTE data )
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{
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switch( addr & 0xE000 ) {
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case 0x8000:
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reg = data;
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break;
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case 0xA000:
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switch( reg & 0x0F ) {
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case 0x00: case 0x01:
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case 0x02: case 0x03:
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case 0x04: case 0x05:
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case 0x06: case 0x07:
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SetVROM_1K_Bank( reg&0x07, data );
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break;
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case 0x08:
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// DEBUGOUT( "Write8 - addr= %04x ; dat= %03x\n", addr, data );
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if( !patch && !(data & 0x40) ) {
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SetPROM_8K_Bank( 3, data );
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}
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break;
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case 0x09:
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// DEBUGOUT( "Write9 - addr= %04x ; dat= %03x\n", addr, data );
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SetPROM_8K_Bank( 4, data );
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break;
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case 0x0A:
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// DEBUGOUT( "WriteA - addr= %04x ; dat= %03x\n", addr, data );
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SetPROM_8K_Bank( 5, data );
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break;
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case 0x0B:
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// DEBUGOUT( "WriteB - addr= %04x ; dat= %03x\n", addr, data );
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SetPROM_8K_Bank( 6, data );
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break;
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case 0x0C:
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data &= 0x03;
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if( data == 0 ) SetVRAM_Mirror( VRAM_VMIRROR );
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else if( data == 1 ) SetVRAM_Mirror( VRAM_HMIRROR );
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else if( data == 2 ) SetVRAM_Mirror( VRAM_MIRROR4L );
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else SetVRAM_Mirror( VRAM_MIRROR4H );
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break;
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case 0x0D:
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DEBUGOUT( "WriteD - addr= %04x ; dat= %03x\n", addr, data );
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irq_enable = data;
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nes->cpu->ClrIRQ( IRQ_MAPPER );
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break;
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case 0x0E:
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DEBUGOUT( "WriteE - addr= %04x ; dat= %03x\n", addr, data );
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irq_counter = (irq_counter & 0xFF00) | data;
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nes->cpu->ClrIRQ( IRQ_MAPPER );
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break;
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case 0x0F:
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DEBUGOUT( "WriteF - addr= %04x ; dat= %03x\n", addr, data );
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irq_counter = (irq_counter & 0x00FF) | (data << 8);
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nes->cpu->ClrIRQ( IRQ_MAPPER );
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break;
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}
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break;
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case 0xC000:
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case 0xE000:
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nes->apu->ExWrite( addr, data );
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break;
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}
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}
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void Mapper069::Clock( INT cycles )
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{
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if( irq_enable && (nes->GetIrqType() == NES::IRQ_CLOCK) ) {
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irq_counter -= cycles;
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if( irq_counter <= 0 ) {
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nes->cpu->SetIRQ( IRQ_MAPPER );
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irq_enable = 0;
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irq_counter = 0xFFFF;
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}
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}
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}
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void Mapper069::HSync( INT scanline )
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{
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if( irq_enable && (nes->GetIrqType() == NES::IRQ_HSYNC) ) {
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irq_counter -= 114;
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if( irq_counter <= 0 ) {
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nes->cpu->SetIRQ( IRQ_MAPPER );
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irq_enable = 0;
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irq_counter = 0xFFFF;
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}
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}
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}
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void Mapper069::SaveState( LPBYTE p )
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{
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p[0] = reg;
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p[1] = irq_enable;
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*(INT*)&p[2] = irq_counter;
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}
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void Mapper069::LoadState( LPBYTE p )
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{
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reg = p[0];
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irq_enable = p[1];
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irq_counter = *(INT*)&p[2];
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}
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