AxibugEmuOnline/References/VirtuaNESex_src_191105/NES/Mapper/Mapper044.cpp
2024-08-05 17:58:53 +08:00

228 lines
4.9 KiB
C++

//////////////////////////////////////////////////////////////////////////
// Mapper044 Super HiK 7-in-1 //
//////////////////////////////////////////////////////////////////////////
void Mapper044::Reset()
{
patch = 0;
if( nes->rom->GetPROM_CRC() == 0x7eef434c ) {
patch = 1;
}
for( INT i = 0; i < 8; i++ ) {
reg[i] = 0;
}
bank = 0;
prg0 = 0;
prg1 = 1;
// set VROM banks
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_CPU();
SetBank_PPU();
irq_enable = 0;
irq_counter = 0;
irq_latch = 0;
}
void Mapper044::WriteLow( WORD addr, BYTE data )
{
if( addr == 0x6000 ) {
if( patch ) {
bank = (data & 0x06) >> 1;
} else {
bank = (data & 0x01) << 1;
}
SetBank_CPU();
SetBank_PPU();
}
}
void Mapper044::Write( WORD addr, BYTE data )
{
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:
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;
bank = data & 0x07;
if( bank == 7 ) {
bank = 6;
}
SetBank_CPU();
SetBank_PPU();
break;
case 0xC000:
reg[4] = data;
irq_counter = data;
break;
case 0xC001:
reg[5] = data;
irq_latch = data;
break;
case 0xE000:
reg[6] = data;
irq_enable = 0;
nes->cpu->ClrIRQ( IRQ_MAPPER );
break;
case 0xE001:
reg[7] = data;
irq_enable = 1;
// nes->cpu->ClrIRQ( IRQ_MAPPER );
break;
}
}
void Mapper044::HSync( INT scanline )
{
if( (scanline >= 0 && scanline <= 239) ) {
if( nes->ppu->IsDispON() ) {
if( irq_enable ) {
if( !(--irq_counter) ) {
irq_counter = irq_latch;
// nes->cpu->IRQ();
nes->cpu->SetIRQ( IRQ_MAPPER );
}
}
}
}
}
void Mapper044::SetBank_CPU()
{
if( reg[0] & 0x40 ) {
SetPROM_8K_Bank( 4, ((bank == 6)?0x1e:0x0e)|(bank<<4) );
SetPROM_8K_Bank( 5, ((bank == 6)?0x1f&prg1:0x0f&prg1)|(bank<<4) );
SetPROM_8K_Bank( 6, ((bank == 6)?0x1f&prg0:0x0f&prg0)|(bank<<4) );
SetPROM_8K_Bank( 7, ((bank == 6)?0x1f:0x0f)|(bank<<4) );
} else {
SetPROM_8K_Bank( 4, ((bank == 6)?0x1f&prg0:0x0f&prg0)|(bank<<4) );
SetPROM_8K_Bank( 5, ((bank == 6)?0x1f&prg1:0x0f&prg1)|(bank<<4) );
SetPROM_8K_Bank( 6, ((bank == 6)?0x1e:0x0e)|(bank<<4) );
SetPROM_8K_Bank( 7, ((bank == 6)?0x1f:0x0f)|(bank<<4) );
}
}
void Mapper044::SetBank_PPU()
{
if( VROM_1K_SIZE ) {
if( reg[0] & 0x80 ) {
SetVROM_1K_Bank( 0, ((bank == 6)?0xff&chr4:0x7f&chr4)|(bank<<7) );
SetVROM_1K_Bank( 1, ((bank == 6)?0xff&chr5:0x7f&chr5)|(bank<<7) );
SetVROM_1K_Bank( 2, ((bank == 6)?0xff&chr6:0x7f&chr6)|(bank<<7) );
SetVROM_1K_Bank( 3, ((bank == 6)?0xff&chr7:0x7f&chr7)|(bank<<7) );
SetVROM_1K_Bank( 4, ((bank == 6)?0xff&chr01:0x7f&chr01)|(bank<<7) );
SetVROM_1K_Bank( 5, ((bank == 6)?0xff&(chr01+1):0x7f&(chr01+1))|(bank<<7) );
SetVROM_1K_Bank( 6, ((bank == 6)?0xff&chr23:0x7f&chr23)|(bank<<7) );
SetVROM_1K_Bank( 7, ((bank == 6)?0xff&(chr23+1):0x7f&(chr23+1))|(bank<<7) );
} else {
SetVROM_1K_Bank( 0, ((bank == 6)?0xff&chr01:0x7f&chr01)|(bank<<7) );
SetVROM_1K_Bank( 1, ((bank == 6)?0xff&(chr01+1):0x7f&(chr01+1))|(bank<<7) );
SetVROM_1K_Bank( 2, ((bank == 6)?0xff&chr23:0x7f&chr23)|(bank<<7) );
SetVROM_1K_Bank( 3, ((bank == 6)?0xff&(chr23+1):0x7f&(chr23+1))|(bank<<7) );
SetVROM_1K_Bank( 4, ((bank == 6)?0xff&chr4:0x7f&chr4)|(bank<<7) );
SetVROM_1K_Bank( 5, ((bank == 6)?0xff&chr5:0x7f&chr5)|(bank<<7) );
SetVROM_1K_Bank( 6, ((bank == 6)?0xff&chr6:0x7f&chr6)|(bank<<7) );
SetVROM_1K_Bank( 7, ((bank == 6)?0xff&chr7:0x7f&chr7)|(bank<<7) );
}
}
}
void Mapper044::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;
p[16] = irq_enable;
p[17] = irq_counter;
p[18] = irq_latch;
p[19] = bank;
}
void Mapper044::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];
irq_enable = p[16];
irq_counter = p[17];
irq_latch = p[18];
bank = p[19];
}