136 lines
2.8 KiB
C++
136 lines
2.8 KiB
C++
//////////////////////////////////////////////////////////////////////////
|
|
// Mapper026 Konami VRC6 (PA0,PA1 reverse) //
|
|
//////////////////////////////////////////////////////////////////////////
|
|
void Mapper026::Reset()
|
|
{
|
|
irq_enable = 0;
|
|
irq_counter = 0;
|
|
irq_latch = 0;
|
|
irq_clock = 0;
|
|
|
|
SetPROM_32K_Bank( 0, 1, PROM_8K_SIZE-2, PROM_8K_SIZE-1 );
|
|
|
|
if( VROM_1K_SIZE ) {
|
|
SetVROM_8K_Bank( 0 );
|
|
}
|
|
|
|
DWORD crc = nes->rom->GetPROM_CRC();
|
|
if( crc == 0x30e64d03 ) { // Esper Dream 2 - Aratanaru Tatakai(J)
|
|
nes->SetRenderMethod( NES::POST_ALL_RENDER );
|
|
}
|
|
if( crc == 0x836cc1ab ) { // Mouryou Senki Madara(J)
|
|
nes->SetRenderMethod( NES::POST_RENDER );
|
|
}
|
|
|
|
nes->apu->SelectExSound( 1 );
|
|
}
|
|
|
|
void Mapper026::Write( WORD addr, BYTE data )
|
|
{
|
|
switch( addr & 0xF003 ) {
|
|
case 0x8000:
|
|
SetPROM_16K_Bank( 4, data );
|
|
break;
|
|
|
|
case 0x9000: case 0x9001: case 0x9002: case 0x9003:
|
|
case 0xA000: case 0xA001: case 0xA002: case 0xA003:
|
|
case 0xB000: case 0xB001: case 0xB002:
|
|
addr = (addr&0xfffc)|((addr&1)<<1)|((addr&2)>>1);
|
|
nes->apu->ExWrite( addr, data );
|
|
break;
|
|
|
|
case 0xB003:
|
|
data = data & 0x7F;
|
|
if( data == 0x08 || data == 0x2C ) SetVRAM_Mirror( VRAM_MIRROR4H );
|
|
else if( data == 0x20 ) SetVRAM_Mirror( VRAM_VMIRROR );
|
|
else if( data == 0x24 ) SetVRAM_Mirror( VRAM_HMIRROR );
|
|
else if( data == 0x28 ) SetVRAM_Mirror( VRAM_MIRROR4L );
|
|
break;
|
|
|
|
case 0xC000:
|
|
SetPROM_8K_Bank( 6, data );
|
|
break;
|
|
|
|
case 0xD000:
|
|
SetVROM_1K_Bank( 0, data );
|
|
break;
|
|
|
|
case 0xD001:
|
|
SetVROM_1K_Bank( 2, data );
|
|
break;
|
|
|
|
case 0xD002:
|
|
SetVROM_1K_Bank( 1, data );
|
|
break;
|
|
|
|
case 0xD003:
|
|
SetVROM_1K_Bank( 3, data );
|
|
break;
|
|
|
|
case 0xE000:
|
|
SetVROM_1K_Bank( 4, data );
|
|
break;
|
|
|
|
case 0xE001:
|
|
SetVROM_1K_Bank( 6, data );
|
|
break;
|
|
|
|
case 0xE002:
|
|
SetVROM_1K_Bank( 5, data );
|
|
break;
|
|
|
|
case 0xE003:
|
|
SetVROM_1K_Bank( 7, data );
|
|
break;
|
|
|
|
case 0xF000:
|
|
irq_latch = data;
|
|
break;
|
|
case 0xF001:
|
|
irq_enable = (irq_enable & 0x01) * 3;
|
|
nes->cpu->ClrIRQ( IRQ_MAPPER );
|
|
break;
|
|
case 0xF002:
|
|
irq_enable = data & 0x03;
|
|
if( irq_enable & 0x02 ) {
|
|
irq_counter = irq_latch;
|
|
irq_clock = 0;
|
|
}
|
|
nes->cpu->ClrIRQ( IRQ_MAPPER );
|
|
break;
|
|
}
|
|
}
|
|
|
|
void Mapper026::Clock( INT cycles )
|
|
{
|
|
if( irq_enable & 0x02 ) {
|
|
if( (irq_clock+=cycles) >= 0x72 ) {
|
|
irq_clock -= 0x72;
|
|
if( irq_counter >= 0xFF ) {
|
|
irq_counter = irq_latch;
|
|
// nes->cpu->IRQ_NotPending();
|
|
//// nes->cpu->IRQ();
|
|
nes->cpu->SetIRQ( IRQ_MAPPER );
|
|
} else {
|
|
irq_counter++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void Mapper026::SaveState( LPBYTE p )
|
|
{
|
|
p[0] = irq_enable;
|
|
p[1] = irq_counter;
|
|
p[2] = irq_latch;
|
|
*(INT*)&p[3] = irq_clock;
|
|
}
|
|
|
|
void Mapper026::LoadState( LPBYTE p )
|
|
{
|
|
irq_enable = p[0];
|
|
irq_counter = p[1];
|
|
irq_latch = p[2];
|
|
irq_clock = *(INT*)&p[3];
|
|
}
|