AxibugEmuOnline/virtuanessrc097-master/NES/Mapper/Mapper065.cpp

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//////////////////////////////////////////////////////////////////////////
// Mapper065 Irem H3001 //
//////////////////////////////////////////////////////////////////////////
void Mapper065::Reset()
{
patch = 0;
// Kaiketsu Yanchamaru 3(J)
if( nes->rom->GetPROM_CRC() == 0xe30b7f64 ) {
patch = 1;
}
SetPROM_32K_Bank( 0, 1, PROM_8K_SIZE-2, PROM_8K_SIZE-1 );
if( VROM_8K_SIZE ) {
SetVROM_8K_Bank( 0 );
}
irq_enable = 0;
irq_counter = 0;
}
void Mapper065::Write( WORD addr, BYTE data )
{
switch( addr ) {
case 0x8000:
SetPROM_8K_Bank( 4, data );
break;
case 0x9000:
if( !patch ) {
if( data & 0x40 ) SetVRAM_Mirror( VRAM_VMIRROR );
else SetVRAM_Mirror( VRAM_HMIRROR );
}
break;
case 0x9001:
if( patch ) {
if( data & 0x80 ) SetVRAM_Mirror( VRAM_HMIRROR );
else SetVRAM_Mirror( VRAM_VMIRROR );
}
break;
case 0x9003:
if( !patch ) {
irq_enable = data & 0x80;
nes->cpu->ClrIRQ( IRQ_MAPPER );
}
break;
case 0x9004:
if( !patch ) {
irq_counter = irq_latch;
}
break;
case 0x9005:
if( patch ) {
irq_counter = (BYTE)(data<<1);
irq_enable = data;
nes->cpu->ClrIRQ( IRQ_MAPPER );
} else {
irq_latch = (irq_latch & 0x00FF)|((INT)data<<8);
}
break;
case 0x9006:
if( patch ) {
irq_enable = 1;
} else {
irq_latch = (irq_latch & 0xFF00)|data;
}
break;
case 0xB000:
case 0xB001:
case 0xB002:
case 0xB003:
case 0xB004:
case 0xB005:
case 0xB006:
case 0xB007:
SetVROM_1K_Bank( addr & 0x0007, data );
break;
case 0xA000:
SetPROM_8K_Bank( 5, data );
break;
case 0xC000:
SetPROM_8K_Bank( 6, data );
break;
}
}
void Mapper065::HSync( INT scanline )
{
if( patch ) {
if( irq_enable ) {
if( irq_counter == 0 ) {
// nes->cpu->IRQ_NotPending();
nes->cpu->SetIRQ( IRQ_MAPPER );
} else {
irq_counter--;
}
}
}
}
void Mapper065::Clock( INT cycles )
{
if( !patch ) {
if( irq_enable ) {
if( irq_counter <= 0 ) {
// nes->cpu->IRQ_NotPending();
nes->cpu->SetIRQ( IRQ_MAPPER );
} else {
irq_counter -= cycles;
}
}
}
}
void Mapper065::SaveState( LPBYTE p )
{
p[0] = irq_enable;
*(INT*)&p[1] = irq_counter;
*(INT*)&p[5] = irq_latch;
}
void Mapper065::LoadState( LPBYTE p )
{
irq_enable = p[0];
irq_counter = *(INT*)&p[1];
irq_latch = *(INT*)&p[5];
}