AxibugEmuOnline/virtuanessrc097-master/NES/Mapper/Mapper095.cpp

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//////////////////////////////////////////////////////////////////////////
// Mapper095 Namcot 106M (Dragon Buster) //
//////////////////////////////////////////////////////////////////////////
void Mapper095::Reset()
{
reg = 0x00;
prg0 = 0;
prg1 = 1;
SetBank_CPU();
if( VROM_1K_SIZE ) {
chr01 = 0;
chr23 = 2;
chr4 = 4;
chr5 = 5;
chr6 = 6;
chr7 = 7;
} else {
chr01 = chr23 = chr4 = chr5 = chr6 = chr7 = 0;
}
SetBank_PPU();
nes->SetRenderMethod( NES::POST_RENDER );
}
void Mapper095::Write( WORD addr, BYTE data )
{
switch( addr & 0xE001 ) {
case 0x8000:
reg = data;
SetBank_CPU();
SetBank_PPU();
break;
case 0x8001:
if( reg <= 0x05 ) {
if( data & 0x20 ) SetVRAM_Mirror( VRAM_MIRROR4H );
else SetVRAM_Mirror( VRAM_MIRROR4L );
data &= 0x1F;
}
switch( reg & 0x07 ) {
case 0x00:
if( VROM_1K_SIZE ) {
chr01 = data & 0xFE;
SetBank_PPU();
}
break;
case 0x01:
if( VROM_1K_SIZE ) {
chr23 = data & 0xFE;
SetBank_PPU();
}
break;
case 0x02:
if( VROM_1K_SIZE ) {
chr4 = data;
SetBank_PPU();
}
break;
case 0x03:
if( VROM_1K_SIZE ) {
chr5 = data;
SetBank_PPU();
}
break;
case 0x04:
if( VROM_1K_SIZE ) {
chr6 = data;
SetBank_PPU();
}
break;
case 0x05:
if( VROM_1K_SIZE ) {
chr7 = data;
SetBank_PPU();
}
break;
case 0x06:
prg0 = data;
SetBank_CPU();
break;
case 0x07:
prg1 = data;
SetBank_CPU();
break;
}
break;
}
}
void Mapper095::SetBank_CPU()
{
if( reg & 0x40 ) {
SetPROM_32K_Bank( PROM_8K_SIZE-2, prg1, prg0, PROM_8K_SIZE-1 );
} else {
SetPROM_32K_Bank( prg0, prg1, PROM_8K_SIZE-2, PROM_8K_SIZE-1 );
}
}
void Mapper095::SetBank_PPU()
{
if( VROM_1K_SIZE ) {
if( reg & 0x80 ) {
SetVROM_8K_Bank( chr4, chr5, chr6, chr7,
chr01, chr01+1, chr23, chr23+1 );
} else {
SetVROM_8K_Bank( chr01, chr01+1, chr23, chr23+1,
chr4, chr5, chr6, chr7 );
}
}
}
void Mapper095::SaveState( LPBYTE p )
{
p[0] = reg;
p[1] = prg0;
p[2] = prg1;
p[3] = chr01;
p[4] = chr23;
p[5] = chr4;
p[6] = chr5;
p[7] = chr6;
p[8] = chr7;
}
void Mapper095::LoadState( LPBYTE p )
{
reg = p[0];
prg0 = p[1];
prg1 = p[2];
chr01 = p[3];
chr23 = p[4];
chr4 = p[5];
chr5 = p[6];
chr6 = p[7];
chr7 = p[8];
}