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/*===================================================================*/
/* */
/* Mapper 225 : 72-in-1 */
/* */
/*===================================================================*/
/*-------------------------------------------------------------------*/
/* Initialize Mapper 225 */
/*-------------------------------------------------------------------*/
void Map225_Init()
{
/* Initialize Mapper */
MapperInit = Map225_Init;
/* Write to Mapper */
MapperWrite = Map225_Write;
/* Write to SRAM */
MapperSram = Map0_Sram;
/* Write to APU */
MapperApu = Map0_Apu;
/* Read from APU */
MapperReadApu = Map0_ReadApu;
/* Callback at VSync */
MapperVSync = Map0_VSync;
/* Callback at HSync */
MapperHSync = Map0_HSync;
/* Callback at PPU */
MapperPPU = Map0_PPU;
/* Callback at Rendering Screen ( 1:BG, 0:Sprite ) */
MapperRenderScreen = Map0_RenderScreen;
/* Set SRAM Banks */
SRAMBANK = SRAM;
/* Set ROM Banks */
ROMBANK0 = ROMPAGE( 0 );
ROMBANK1 = ROMPAGE( 1 );
ROMBANK2 = ROMPAGE( 2 );
ROMBANK3 = ROMPAGE( 3 );
/* Set PPU Banks */
if ( NesHeader.byVRomSize > 0 ) {
for ( int nPage = 0; nPage < 8; ++nPage )
PPUBANK[ nPage ] = VROMPAGE( nPage );
InfoNES_SetupChr();
}
/* Set up wiring of the interrupt pin */
K6502_Set_Int_Wiring( 1, 1 );
}
/*-------------------------------------------------------------------*/
/* Mapper 225 Write Function */
/*-------------------------------------------------------------------*/
void Map225_Write( WORD wAddr, BYTE byData )
{
BYTE byPrgBank = (wAddr & 0x0F80) >> 7;
BYTE byChrBank = wAddr & 0x003F;
PPUBANK[ 0 ] = VROMPAGE(((byChrBank<<3)+0) % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 1 ] = VROMPAGE(((byChrBank<<3)+1) % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 2 ] = VROMPAGE(((byChrBank<<3)+2) % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 3 ] = VROMPAGE(((byChrBank<<3)+3) % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 4 ] = VROMPAGE(((byChrBank<<3)+4) % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 5 ] = VROMPAGE(((byChrBank<<3)+5) % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 6 ] = VROMPAGE(((byChrBank<<3)+6) % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 7 ] = VROMPAGE(((byChrBank<<3)+7) % ( NesHeader.byVRomSize << 3 ) );
InfoNES_SetupChr();
if( wAddr & 0x2000 ) {
InfoNES_Mirroring( 0 );
} else {
InfoNES_Mirroring( 1 );
}
if( wAddr & 0x1000 ) {
// 16KBbank
if( wAddr & 0x0040 ) {
ROMBANK0 = ROMPAGE(((byPrgBank<<2)+2) % ( NesHeader.byRomSize << 1 ) );
ROMBANK1 = ROMPAGE(((byPrgBank<<2)+3) % ( NesHeader.byRomSize << 1 ) );
ROMBANK2 = ROMPAGE(((byPrgBank<<2)+2) % ( NesHeader.byRomSize << 1 ) );
ROMBANK3 = ROMPAGE(((byPrgBank<<2)+3) % ( NesHeader.byRomSize << 1 ) );
} else {
ROMBANK0 = ROMPAGE(((byPrgBank<<2)+0) % ( NesHeader.byRomSize << 1 ) );
ROMBANK1 = ROMPAGE(((byPrgBank<<2)+1) % ( NesHeader.byRomSize << 1 ) );
ROMBANK2 = ROMPAGE(((byPrgBank<<2)+0) % ( NesHeader.byRomSize << 1 ) );
ROMBANK3 = ROMPAGE(((byPrgBank<<2)+1) % ( NesHeader.byRomSize << 1 ) );
}
} else {
ROMBANK0 = ROMPAGE(((byPrgBank<<2)+0) % ( NesHeader.byRomSize << 1 ) );
ROMBANK1 = ROMPAGE(((byPrgBank<<2)+1) % ( NesHeader.byRomSize << 1 ) );
ROMBANK2 = ROMPAGE(((byPrgBank<<2)+2) % ( NesHeader.byRomSize << 1 ) );
ROMBANK3 = ROMPAGE(((byPrgBank<<2)+3) % ( NesHeader.byRomSize << 1 ) );
}
}
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