AxibugEmuOnline/virtuanessrc097-master/NES/Mapper/Mapper069.cpp

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