AxibugEmuOnline/virtuanessrc097-master/NES/Mapper/Mapper191.cpp

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//////////////////////////////////////////////////////////////////////////
// Mapper191 SACHEN Super Cartridge Xin1 (Ver.1-9) //
// SACHEN Q-BOY Support //
//////////////////////////////////////////////////////////////////////////
void Mapper191::Reset()
{
for( INT i = 0; i < 8; i++ ) {
reg[i] = 0x00;
}
prg0 = 0;
// prg1 = 1;
SetBank_CPU();
chr0 = 0;
chr1 = 0;
chr2 = 0;
chr3 = 0;
highbank = 0;
SetBank_PPU();
}
void Mapper191::WriteLow( WORD addr, BYTE data )
{
switch( addr ) {
case 0x4100:
reg[0]=data;
break;
case 0x4101:
reg[1]=data;
switch( reg[0] ) {
case 0:
chr0=data&7;
SetBank_PPU();
break;
case 1:
chr1=data&7;
SetBank_PPU();
break;
case 2:
chr2=data&7;
SetBank_PPU();
break;
case 3:
chr3=data&7;
SetBank_PPU();
break;
case 4:
highbank=data&7;
SetBank_PPU();
break;
case 5:
prg0=data&7;
SetBank_CPU();
break;
case 7:
if( data & 0x02 ) SetVRAM_Mirror( VRAM_HMIRROR );
else SetVRAM_Mirror( VRAM_VMIRROR );
break;
}
break;
}
}
void Mapper191::SetBank_CPU()
{
SetPROM_32K_Bank( prg0 );
}
void Mapper191::SetBank_PPU()
{
if( VROM_1K_SIZE ) {
SetVROM_1K_Bank( 0, (((highbank<<3)+chr0)<<2)+0 );
SetVROM_1K_Bank( 1, (((highbank<<3)+chr0)<<2)+1 );
SetVROM_1K_Bank( 2, (((highbank<<3)+chr1)<<2)+2 );
SetVROM_1K_Bank( 3, (((highbank<<3)+chr1)<<2)+3 );
SetVROM_1K_Bank( 4, (((highbank<<3)+chr2)<<2)+0 );
SetVROM_1K_Bank( 5, (((highbank<<3)+chr2)<<2)+1 );
SetVROM_1K_Bank( 6, (((highbank<<3)+chr3)<<2)+2 );
SetVROM_1K_Bank( 7, (((highbank<<3)+chr3)<<2)+3 );
}
}
void Mapper191::SaveState( LPBYTE p )
{
p[0] = prg0;
p[1] = chr0;
p[2] = chr1;
p[3] = chr2;
p[4] = chr3;
p[5] = highbank;
}
void Mapper191::LoadState( LPBYTE p )
{
prg0 = p[0];
chr0 = p[1];
chr1 = p[2];
chr2 = p[3];
chr3 = p[4];
highbank = p[5];
}