73 lines
1.5 KiB
C++
73 lines
1.5 KiB
C++
//////////////////////////////////////////////////////////////////////////
|
|
// Mapper091 PC-HK-SF3 //
|
|
//////////////////////////////////////////////////////////////////////////
|
|
void Mapper091::Reset()
|
|
{
|
|
SetPROM_32K_Bank( PROM_8K_SIZE-2, PROM_8K_SIZE-1, PROM_8K_SIZE-2, PROM_8K_SIZE-1 );
|
|
|
|
if( VROM_8K_SIZE ) {
|
|
SetVROM_8K_Bank( 0, 0, 0, 0, 0, 0, 0, 0 );
|
|
}
|
|
|
|
irq_enable = 0;
|
|
irq_counter = 0;
|
|
|
|
nes->SetRenderMethod( NES::POST_ALL_RENDER );
|
|
}
|
|
|
|
void Mapper091::WriteLow( WORD addr, BYTE data )
|
|
{
|
|
//DEBUGOUT( "$%04X:$%02X(%3d) L=%3d\n", addr, data, data, nes->GetScanline() );
|
|
switch( addr & 0xF003 ) {
|
|
case 0x6000:
|
|
case 0x6001:
|
|
case 0x6002:
|
|
case 0x6003:
|
|
SetVROM_2K_Bank( (addr&0x03)*2, data );
|
|
break;
|
|
|
|
case 0x7000:
|
|
DEBUGOUT( "(7000)dat = %3x\n", data );
|
|
SetPROM_8K_Bank( 4, data );
|
|
break;
|
|
case 0x7001:
|
|
DEBUGOUT( "(7001)dat = %3x\n", data );
|
|
SetPROM_8K_Bank( 5, data );
|
|
break;
|
|
|
|
case 0x7002:
|
|
irq_enable = 0;
|
|
irq_counter = 0;
|
|
nes->cpu->ClrIRQ( IRQ_MAPPER );
|
|
break;
|
|
case 0x7003:
|
|
irq_enable = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
void Mapper091::HSync( INT scanline )
|
|
{
|
|
if( (scanline >= 0 && scanline < 240) && nes->ppu->IsDispON() ) {
|
|
if( irq_enable ) {
|
|
irq_counter++;
|
|
}
|
|
if( irq_counter >= 8 ) {
|
|
// nes->cpu->IRQ_NotPending();
|
|
nes->cpu->SetIRQ( IRQ_MAPPER );
|
|
}
|
|
}
|
|
}
|
|
|
|
void Mapper091::SaveState( LPBYTE p )
|
|
{
|
|
p[0] = irq_enable;
|
|
p[1] = irq_counter;
|
|
}
|
|
|
|
void Mapper091::LoadState( LPBYTE p )
|
|
{
|
|
irq_enable = p[0];
|
|
irq_counter = p[1];
|
|
}
|