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/*===================================================================*/
/* */
/* Mapper 113 (PC-Sachen/Hacker) */
/* */
/*===================================================================*/
/*-------------------------------------------------------------------*/
/* Initialize Mapper 113 */
/*-------------------------------------------------------------------*/
void Map113_Init()
{
/* Initialize Mapper */
MapperInit = Map113_Init;
/* Write to Mapper */
MapperWrite = Map113_Write;
/* Write to SRAM */
MapperSram = Map0_Sram;
/* Write to APU */
MapperApu = Map113_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 113 Write to Apu Function */
/*-------------------------------------------------------------------*/
void Map113_Apu( WORD wAddr, BYTE byData )
{
BYTE byPrgBank, byChrBank;
switch ( wAddr )
{
case 0x4100:
case 0x4111:
case 0x4120:
case 0x4900:
byPrgBank = byData >> 3;
if ( ( NesHeader.byRomSize << 1 ) <= 8 && ( NesHeader.byVRomSize << 3 ) == 128 )
{
byChrBank = ( ( byData >> 3 ) & 0x08 ) + ( byData & 0x07 );
} else {
byChrBank = byData & 0x07;
}
/* Set ROM Banks */
byPrgBank = ( byPrgBank << 2 ) % ( NesHeader.byRomSize << 1 );
ROMBANK0 = ROMPAGE( byPrgBank + 0 );
ROMBANK1 = ROMPAGE( byPrgBank + 1 );
ROMBANK2 = ROMPAGE( byPrgBank + 2 );
ROMBANK3 = ROMPAGE( byPrgBank + 3 );
/* Set PPU Banks */
byChrBank = ( byChrBank << 3 ) % ( NesHeader.byVRomSize << 3 );
PPUBANK[ 0 ] = VROMPAGE( byChrBank + 0 );
PPUBANK[ 1 ] = VROMPAGE( byChrBank + 1 );
PPUBANK[ 2 ] = VROMPAGE( byChrBank + 2 );
PPUBANK[ 3 ] = VROMPAGE( byChrBank + 3 );
PPUBANK[ 4 ] = VROMPAGE( byChrBank + 4 );
PPUBANK[ 5 ] = VROMPAGE( byChrBank + 5 );
PPUBANK[ 6 ] = VROMPAGE( byChrBank + 6 );
PPUBANK[ 7 ] = VROMPAGE( byChrBank + 7 );
InfoNES_SetupChr();
break;
}
}
/*-------------------------------------------------------------------*/
/* Mapper 113 Write Function */
/*-------------------------------------------------------------------*/
void Map113_Write( WORD wAddr, BYTE byData )
{
BYTE byPrgBank, byChrBank;
switch ( wAddr )
{
case 0x8008:
case 0x8009:
byPrgBank = byData >> 3;
if ( ( NesHeader.byRomSize << 1 ) <= 8 && ( NesHeader.byVRomSize << 3 ) == 128 )
{
byChrBank = ( ( byData >> 3 ) & 0x08 ) + ( byData & 0x07 );
} else {
byChrBank = byData & 0x07;
}
/* Set ROM Banks */
byPrgBank = ( byPrgBank << 2 ) % ( NesHeader.byRomSize << 1 );
ROMBANK0 = ROMPAGE( byPrgBank + 0 );
ROMBANK1 = ROMPAGE( byPrgBank + 1 );
ROMBANK2 = ROMPAGE( byPrgBank + 2 );
ROMBANK3 = ROMPAGE( byPrgBank + 3 );
/* Set PPU Banks */
byChrBank = ( byChrBank << 3 ) % ( NesHeader.byVRomSize << 3 );
PPUBANK[ 0 ] = VROMPAGE( byChrBank + 0 );
PPUBANK[ 1 ] = VROMPAGE( byChrBank + 1 );
PPUBANK[ 2 ] = VROMPAGE( byChrBank + 2 );
PPUBANK[ 3 ] = VROMPAGE( byChrBank + 3 );
PPUBANK[ 4 ] = VROMPAGE( byChrBank + 4 );
PPUBANK[ 5 ] = VROMPAGE( byChrBank + 5 );
PPUBANK[ 6 ] = VROMPAGE( byChrBank + 6 );
PPUBANK[ 7 ] = VROMPAGE( byChrBank + 7 );
InfoNES_SetupChr();
break;
}
}
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