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/*===================================================================*/
/* */
/* Mapper 134 */
/* */
/*===================================================================*/
BYTE Map134_Cmd, Map134_Prg, Map134_Chr;
/*-------------------------------------------------------------------*/
/* Initialize Mapper 134 */
/*-------------------------------------------------------------------*/
void Map134_Init()
{
/* Initialize Mapper */
MapperInit = Map134_Init;
/* Write to Mapper */
MapperWrite = Map0_Write;
/* Write to SRAM */
MapperSram = Map0_Sram;
/* Write to APU */
MapperApu = Map134_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 134 Write to APU Function */
/*-------------------------------------------------------------------*/
void Map134_Apu( WORD wAddr, BYTE byData )
{
switch( wAddr & 0x4101 ) {
case 0x4100:
Map134_Cmd = byData & 0x07;
break;
case 0x4101:
switch( Map134_Cmd ) {
case 0:
Map134_Prg = 0;
Map134_Chr = 3;
break;
case 4:
Map134_Chr &= 0x3;
Map134_Chr |= (byData & 0x07) << 2;
break;
case 5:
Map134_Prg = byData & 0x07;
break;
case 6:
Map134_Chr &= 0x1C;
Map134_Chr |= byData & 0x3;
break;
case 7:
if( byData & 0x01 ) InfoNES_Mirroring( 0 );
else InfoNES_Mirroring( 1 );
break;
}
break;
}
/* Set ROM Banks */
ROMBANK0 = ROMPAGE( ((Map134_Prg<<2) + 0 ) % (NesHeader.byRomSize << 1) );
ROMBANK1 = ROMPAGE( ((Map134_Prg<<2) + 1 ) % (NesHeader.byRomSize << 1) );
ROMBANK2 = ROMPAGE( ((Map134_Prg<<2) + 2 ) % (NesHeader.byRomSize << 1) );
ROMBANK3 = ROMPAGE( ((Map134_Prg<<2) + 3 ) % (NesHeader.byRomSize << 1) );
/* Set PPU Banks */
PPUBANK[ 0 ] = VROMPAGE( ((Map134_Chr<<3) + 0) % (NesHeader.byVRomSize << 3) );
PPUBANK[ 1 ] = VROMPAGE( ((Map134_Chr<<3) + 1) % (NesHeader.byVRomSize << 3) );
PPUBANK[ 2 ] = VROMPAGE( ((Map134_Chr<<3) + 2) % (NesHeader.byVRomSize << 3) );
PPUBANK[ 3 ] = VROMPAGE( ((Map134_Chr<<3) + 3) % (NesHeader.byVRomSize << 3) );
PPUBANK[ 4 ] = VROMPAGE( ((Map134_Chr<<3) + 4) % (NesHeader.byVRomSize << 3) );
PPUBANK[ 5 ] = VROMPAGE( ((Map134_Chr<<3) + 5) % (NesHeader.byVRomSize << 3) );
PPUBANK[ 6 ] = VROMPAGE( ((Map134_Chr<<3) + 6) % (NesHeader.byVRomSize << 3) );
PPUBANK[ 7 ] = VROMPAGE( ((Map134_Chr<<3) + 7) % (NesHeader.byVRomSize << 3) );
InfoNES_SetupChr();
//Map134_Wram[ wAddr & 0x1fff ] = byData;
}
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