AxibugEmuOnline/virtuanessrc097-master/NES/Mapper/Mapper048.cpp

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//////////////////////////////////////////////////////////////////////////
// Mapper048 Taito TC190V //
//////////////////////////////////////////////////////////////////////////
void Mapper048::Reset()
{
reg = 0;
irq_enable = 0;
irq_counter = 0;
SetPROM_32K_Bank( 0, 1, PROM_8K_SIZE-2, PROM_8K_SIZE-1 );
SetVROM_8K_Bank( 0 );
DWORD crc = nes->rom->GetPROM_CRC();
// if( crc == 0x547e6cc1 ) { // Flintstones - The Rescue of Dino & Hoppy(J)
// nes->SetRenderMethod( NES::POST_RENDER );
// }
}
void Mapper048::Write( WORD addr, BYTE data )
{
switch( addr ) {
case 0x8000:
if( !reg ) {
if( data & 0x40 ) SetVRAM_Mirror( VRAM_HMIRROR );
else SetVRAM_Mirror( VRAM_VMIRROR );
}
SetPROM_8K_Bank( 4, data );
break;
case 0x8001:
SetPROM_8K_Bank( 5, data );
break;
case 0x8002:
SetVROM_2K_Bank( 0, data );
break;
case 0x8003:
SetVROM_2K_Bank( 2, data );
break;
case 0xA000:
SetVROM_1K_Bank( 4, data );
break;
case 0xA001:
SetVROM_1K_Bank( 5, data );
break;
case 0xA002:
SetVROM_1K_Bank( 6, data );
break;
case 0xA003:
SetVROM_1K_Bank( 7, data );
break;
case 0xC000:
irq_counter = data;
irq_enable = 0;
// nes->cpu->ClrIRQ( IRQ_MAPPER );
break;
case 0xC001:
irq_counter = data;
irq_enable = 1;
// irq_enable = data & 0x01;
// nes->cpu->ClrIRQ( IRQ_MAPPER );
break;
case 0xC002:
break;
case 0xC003:
break;
case 0xE000:
if( data & 0x40 ) SetVRAM_Mirror( VRAM_HMIRROR );
else SetVRAM_Mirror( VRAM_VMIRROR );
reg = 1;
break;
}
}
void Mapper048::HSync( INT scanline )
{
if( (scanline >= 0 && scanline <= 239) ) {
if( nes->ppu->IsDispON() ) {
if( irq_enable ) {
if( irq_counter == 0xFF ) {
// nes->cpu->IRQ_NotPending();
// nes->cpu->SetIRQ( IRQ_MAPPER );
nes->cpu->SetIRQ( IRQ_TRIGGER2 );
}
irq_counter++;
}
}
}
}
void Mapper048::SaveState( LPBYTE p )
{
p[0] = reg;
p[1] = irq_enable;
p[2] = irq_counter;
}
void Mapper048::LoadState( LPBYTE p )
{
reg = p[0];
irq_enable = p[1];
irq_counter = p[2];
}