AxibugEmuOnline/virtuanessrc097-master/NES/Mapper/Mapper110.cpp

59 lines
2.2 KiB
C++
Raw Permalink Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

//////////////////////////////////////////////////////////////////////////
// Mapper110 //
//////////////////////////////////////////////////////////////////////////
void Mapper110::Reset()
{
SetPROM_32K_Bank( 0 );
SetVROM_8K_Bank( 0 );
reg0 = 0;
reg1 = 0;
}
void Mapper110::WriteLow( WORD addr, BYTE data )
{
switch( addr ) {
case 0x4100:
reg1 = data & 0x07;
break;
case 0x4101:
switch( reg1 ) {
case 5:
SetPROM_32K_Bank( data );
break;
case 0:
reg0 = data & 0x01;
SetVROM_8K_Bank( reg0 );
break;
case 2:
reg0 = data;
SetVROM_8K_Bank( reg0 );
break;
case 4:
reg0 = reg0 | (data<<1);
SetVROM_8K_Bank( reg0 );
break;
case 6:
reg0 = reg0 | (data<<2);
SetVROM_8K_Bank( reg0 );
break;
default:
break;
}
break;
default:
break;
}
}
void Mapper110::SaveState( LPBYTE p )
{
p[ 0] = reg0;
p[ 1] = reg1;
}
void Mapper110::LoadState( LPBYTE p )
{
reg0 = p[ 0];
reg1 = p[ 1];
}