AxibugEmuOnline/References/VirtuaNESex_src_191105/NES/Mapper/Mapper198.cpp
2024-08-05 17:58:53 +08:00

218 lines
4.0 KiB
C++

//////////////////////////////////////////////////////////////////////////
// Mapper198 Nintendo MMC3 //
//////////////////////////////////////////////////////////////////////////
void Mapper198::Reset()
{
for( INT i = 0; i < 8; i++ ) {
reg[i] = 0x00;
}
prg0 = 0;
prg1 = 1;
prg2 = PROM_8K_SIZE-2;
prg3 = PROM_8K_SIZE-1;
SetBank_CPU();
chr01 = 0;
chr23 = 2;
chr4 = 4;
chr5 = 5;
chr6 = 6;
chr7 = 7;
SetBank_PPU();
reg6800 = 0;
reg6803 = 0;
DWORD crc = nes->rom->GetPROM_CRC();
if( crc == 0x935F2119 ) { //[ES-1110] Cheng Ji Si Han (C)
sp_rom = 1;
nes->SetSAVERAM_SIZE( 16*1024 );
wram_bank = 0;
wram_count = 0;
}
}
void Mapper198::WriteLow( WORD addr, BYTE data )
{
// if((addr!=0x7FA2)&&(addr!=0x7FA3)&&(addr>=0x6000)) DEBUGOUT("Address=%04X Data=%02X\n", addr&0xFFFF, data&0xFF );
// DEBUGOUT("Address=%04X Data=%02X\n", addr&0xFFFF, data&0xFF );
if(nes->rom->GetPROM_CRC()==0x2779bb41){
switch( addr ) { //[NJ064] Sudoku (C)
case 0x6800:
reg6800 = data;
break;
case 0x6803:
reg6803 = data;
if((reg6800==0xe0)&&(reg6803==0x97)){
prg0 = (PROM_8K_SIZE>>1)-4;
prg1 = (PROM_8K_SIZE>>1)-3;
prg2 = (PROM_8K_SIZE>>1)-2;
prg3 = (PROM_8K_SIZE>>1)-1;
SetBank_CPU();
}
if((reg6800==0xe1)&&(reg6803==0x97)){
prg0 = (PROM_8K_SIZE>>2)-4;
prg1 = (PROM_8K_SIZE>>2)-3;
prg2 = (PROM_8K_SIZE>>2)-2;
prg3 = (PROM_8K_SIZE>>2)-1;
SetBank_CPU();
}
break;
}
}
if((sp_rom==1)&&(addr==0x5226)) {
if( data ) {
SetPROM_Bank( 3, &WRAM[0x0000], BANKTYPE_RAM );
} else {
SetPROM_Bank( 3, &WRAM[0x2000], BANKTYPE_RAM );
}
}
if( (addr>0x4018 && addr<0x6000)||(sp_rom==1) )
CPU_MEM_BANK[addr>>13][addr&0x1FFF] = data;
else
adr5000buf[addr&0xFFF] = data;
}
BYTE Mapper198::ReadLow( WORD addr )
{
if( (addr>0x4018 && addr<0x6000)||(sp_rom==1) )
return CPU_MEM_BANK[addr>>13][addr&0x1FFF];
else
return adr5000buf[addr&0xFFF];
}
void Mapper198::Write( WORD addr, BYTE data )
{
// DEBUGOUT("Address=%04X Data=%02X\n", addr&0xFFFF, data&0xFF );
switch( addr & 0xE001 ) {
case 0x8000:
reg[0] = data;
SetBank_CPU();
SetBank_PPU();
break;
case 0x8001:
reg[1] = data;
switch( reg[0] & 0x07 ) {
case 0x00:
chr01 = data & 0xFE;
SetBank_PPU();
break;
case 0x01:
chr23 = data & 0xFE;
SetBank_PPU();
break;
case 0x02:
chr4 = data;
SetBank_PPU();
break;
case 0x03:
chr5 = data;
SetBank_PPU();
break;
case 0x04:
chr6 = data;
SetBank_PPU();
break;
case 0x05:
chr7 = data;
SetBank_PPU();
break;
case 0x06:
if(data>=0x50) data&=0x4F;
prg0 = data;
SetBank_CPU();
break;
case 0x07:
prg1 = data;
SetBank_CPU();
break;
}
break;
case 0xA000:
reg[2] = data;
if( !nes->rom->Is4SCREEN() ) {
if( data & 0x01 ) SetVRAM_Mirror( VRAM_HMIRROR );
else SetVRAM_Mirror( VRAM_VMIRROR );
}
break;
case 0xA001:
reg[3] = data;
break;
case 0xC000:
reg[4] = data;
break;
case 0xC001:
reg[5] = data;
break;
case 0xE000:
reg[6] = data;
break;
case 0xE001:
reg[7] = data;
break;
}
}
void Mapper198::SetBank_CPU()
{
if( reg[0] & 0x40 ) {
SetPROM_32K_Bank( prg2, prg1, prg0, prg3 );
} else {
SetPROM_32K_Bank( prg0, prg1, prg2, prg3 );
}
}
void Mapper198::SetBank_PPU()
{
if( VROM_1K_SIZE ) {
if( reg[0] & 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 Mapper198::SaveState( LPBYTE p )
{
for( INT i = 0; i < 8; i++ ) {
p[i] = reg[i];
}
p[ 8] = prg0;
p[ 9] = prg1;
p[10] = chr01;
p[11] = chr23;
p[12] = chr4;
p[13] = chr5;
p[14] = chr6;
p[15] = chr7;
}
void Mapper198::LoadState( LPBYTE p )
{
for( INT i = 0; i < 8; i++ ) {
reg[i] = p[i];
}
prg0 = p[ 8];
prg1 = p[ 9];
chr01 = p[10];
chr23 = p[11];
chr4 = p[12];
chr5 = p[13];
chr6 = p[14];
chr7 = p[15];
}