128 lines
5.5 KiB
C++
128 lines
5.5 KiB
C++
//////////////////////////////////////////////////////////////////////////
|
||
// Mapper164 Pocket Monster Gold //
|
||
//////////////////////////////////////////////////////////////////////////
|
||
|
||
|
||
void Mapper164::Reset()
|
||
{
|
||
reg5000 = 0;
|
||
reg5100 = 0;
|
||
SetBank_CPU();
|
||
SetBank_PPU();
|
||
nes->ppu->SetExtLatchMode( TRUE );
|
||
}
|
||
|
||
void Mapper164::WriteLow(WORD addr, BYTE data)
|
||
{
|
||
if(addr==0x5000){
|
||
p_mode = data>>7;
|
||
reg5000 = data;
|
||
SetBank_CPU();
|
||
SetBank_PPU();
|
||
}else if(addr==0x5100){
|
||
reg5100 = data;
|
||
SetBank_CPU();
|
||
SetBank_PPU();
|
||
}else if(addr>=0x6000){
|
||
CPU_MEM_BANK[addr>>13][addr&0x1FFF] = data;
|
||
}else{
|
||
DEBUGOUT("write to %04x:%02x\n", addr, data);
|
||
}
|
||
|
||
}
|
||
|
||
|
||
void Mapper164::SetBank_CPU()
|
||
{
|
||
int mode, base, bank;
|
||
|
||
base = (reg5100&1)<<5;
|
||
mode = (reg5000>>4)&0x07;
|
||
|
||
switch(mode){
|
||
case 0:
|
||
case 2:
|
||
case 4:
|
||
case 6: /* NORMAL MODE */
|
||
bank = (reg5000&0x0f);
|
||
bank += (reg5000&0x20)>>1;
|
||
SetPROM_16K_Bank(4, bank+base);
|
||
SetPROM_16K_Bank(6, base+0x1f);
|
||
DEBUGOUT("-- normal mode: mode=%d, bank=%d --\n", mode, bank);
|
||
break;
|
||
case 1:
|
||
case 3: /* REG MODE */
|
||
DEBUGOUT("-- reg mode --\n");
|
||
break;
|
||
case 5: /* 32K MODE */
|
||
bank = (reg5000&0x0f);
|
||
SetPROM_32K_Bank(bank+(base>>1));
|
||
// DEBUGOUT("-- 32K MODE: bank=%02x --\n", bank);
|
||
break;
|
||
case 7: /* HALF MODE */
|
||
bank = (reg5000&0x0f);
|
||
bank += (bank&0x08)<<1;
|
||
SetPROM_16K_Bank(4, bank+base);
|
||
bank = (bank&0x10)+0x0f;
|
||
SetPROM_16K_Bank(6, base+0x1f);
|
||
DEBUGOUT("-- half mode --\n");
|
||
break;
|
||
default:
|
||
break;
|
||
};
|
||
|
||
}
|
||
|
||
void Mapper164::SetBank_PPU()
|
||
{
|
||
SetCRAM_8K_Bank(0);
|
||
}
|
||
|
||
|
||
void Mapper164::PPU_ExtLatchX( INT x )
|
||
{
|
||
a3 = (x&1)<<3;
|
||
}
|
||
|
||
void Mapper164::PPU_ExtLatch( WORD ntbladr, BYTE& chr_l, BYTE& chr_h, BYTE& attr )
|
||
{
|
||
INT loopy_v = nes->ppu->GetPPUADDR();
|
||
INT loopy_y = nes->ppu->GetTILEY();
|
||
INT tileofs = (PPUREG[0]&PPU_BGTBL_BIT)<<8;
|
||
INT attradr = 0x23C0+(loopy_v&0x0C00)+((loopy_v&0x0380)>>4);
|
||
INT attrsft = (ntbladr&0x0040)>>4;
|
||
LPBYTE pNTBL = PPU_MEM_BANK[ntbladr>>10];
|
||
INT ntbl_x = ntbladr&0x001F;
|
||
INT tileadr;
|
||
|
||
attradr &= 0x3FF;
|
||
attr = ((pNTBL[attradr+(ntbl_x>>2)]>>((ntbl_x&2)+attrsft))&3)<<2;
|
||
tileadr = tileofs+pNTBL[ntbladr&0x03FF]*0x10+loopy_y;
|
||
|
||
if(p_mode){
|
||
tileadr = (tileadr&0xfff7)|a3;
|
||
chr_l = chr_h = PPU_MEM_BANK[tileadr>>10][ tileadr&0x03FF ];
|
||
}else{
|
||
chr_l = PPU_MEM_BANK[tileadr>>10][ tileadr&0x03FF ];
|
||
chr_h = PPU_MEM_BANK[tileadr>>10][(tileadr&0x03FF)+8];
|
||
}
|
||
|
||
}
|
||
|
||
void Mapper164::SaveState( LPBYTE p )
|
||
{
|
||
p[0] = reg5000;
|
||
p[1] = reg5100;
|
||
p[2] = a3;
|
||
p[3] = p_mode;
|
||
}
|
||
|
||
void Mapper164::LoadState( LPBYTE p )
|
||
{
|
||
|
||
reg5000 = p[0];
|
||
reg5100 = p[1];
|
||
a3 = p[2];
|
||
p_mode = p[3];
|
||
}
|