76 lines
3.8 KiB
C++
76 lines
3.8 KiB
C++
//////////////////////////////////////////////////////////////////////////
|
||
// Mapper235 150-in-1 //
|
||
//////////////////////////////////////////////////////////////////////////
|
||
void Mapper235::Reset()
|
||
{
|
||
for( INT i = 0; i < 0x2000; i++ ) {
|
||
DRAM[i] = 0xFF;
|
||
}
|
||
|
||
SetPROM_32K_Bank( 0 );
|
||
}
|
||
|
||
void Mapper235::Write( WORD addr, BYTE data )
|
||
{
|
||
BYTE prg = ((addr&0x0300)>>3)|(addr&0x001F);
|
||
BYTE bus = 0;
|
||
|
||
if( PROM_8K_SIZE == 64*2 ) {
|
||
// 100-in-1
|
||
switch( addr & 0x0300 ) {
|
||
case 0x0000: break;
|
||
case 0x0100: bus = 1; break;
|
||
case 0x0200: bus = 1; break;
|
||
case 0x0300: bus = 1; break;
|
||
}
|
||
} else if( PROM_8K_SIZE == 128*2 ) {
|
||
// 150-in-1
|
||
switch( addr & 0x0300 ) {
|
||
case 0x0000: break;
|
||
case 0x0100: bus = 1; break;
|
||
case 0x0200: prg = (prg&0x1F)|0x20; break;
|
||
case 0x0300: bus = 1; break;
|
||
}
|
||
} else if( PROM_8K_SIZE == 192*2 ) {
|
||
// 150-in-1
|
||
switch( addr & 0x0300 ) {
|
||
case 0x0000: break;
|
||
case 0x0100: bus = 1; break;
|
||
case 0x0200: prg = (prg&0x1F)|0x20; break;
|
||
case 0x0300: prg = (prg&0x1F)|0x40; break;
|
||
}
|
||
} else if( PROM_8K_SIZE == 256*2 ) {
|
||
}
|
||
|
||
if( addr & 0x0800 ) {
|
||
if( addr & 0x1000 ) {
|
||
SetPROM_8K_Bank( 4, prg*4+2 );
|
||
SetPROM_8K_Bank( 5, prg*4+3 );
|
||
SetPROM_8K_Bank( 6, prg*4+2 );
|
||
SetPROM_8K_Bank( 7, prg*4+3 );
|
||
} else {
|
||
SetPROM_8K_Bank( 4, prg*4+0 );
|
||
SetPROM_8K_Bank( 5, prg*4+1 );
|
||
SetPROM_8K_Bank( 6, prg*4+0 );
|
||
SetPROM_8K_Bank( 7, prg*4+1 );
|
||
}
|
||
} else {
|
||
SetPROM_32K_Bank( prg );
|
||
}
|
||
|
||
if( bus ) {
|
||
SetPROM_Bank( 4, DRAM, BANKTYPE_ROM );
|
||
SetPROM_Bank( 5, DRAM, BANKTYPE_ROM );
|
||
SetPROM_Bank( 6, DRAM, BANKTYPE_ROM );
|
||
SetPROM_Bank( 7, DRAM, BANKTYPE_ROM );
|
||
}
|
||
|
||
if( addr & 0x0400 ) {
|
||
SetVRAM_Mirror( VRAM_MIRROR4L );
|
||
} else if( addr & 0x2000 ) {
|
||
SetVRAM_Mirror( VRAM_HMIRROR );
|
||
} else {
|
||
SetVRAM_Mirror( VRAM_VMIRROR );
|
||
}
|
||
}
|