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/*===================================================================*/
/* */
/* Mapper 71 (Camerica Custom Mapper) */
/* */
/*===================================================================*/
/*-------------------------------------------------------------------*/
/* Initialize Mapper 71 */
/*-------------------------------------------------------------------*/
void Map71_Init()
{
/* Initialize Mapper */
MapperInit = Map71_Init;
/* Write to Mapper */
MapperWrite = Map71_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 = ROMLASTPAGE( 1 );
ROMBANK3 = ROMLASTPAGE( 0 );
/* Set up wiring of the interrupt pin */
K6502_Set_Int_Wiring( 1, 1 );
}
/*-------------------------------------------------------------------*/
/* Mapper 71 Write Function */
/*-------------------------------------------------------------------*/
void Map71_Write( WORD wAddr, BYTE byData )
{
switch ( wAddr & 0xf000 )
{
case 0x9000:
if ( byData & 0x10 )
{
InfoNES_Mirroring( 2 );
} else {
InfoNES_Mirroring( 3 );
}
break;
/* Set ROM Banks */
case 0xc000:
case 0xd000:
case 0xe000:
case 0xf000:
ROMBANK0 = ROMPAGE( ( ( byData << 1 ) + 0 ) % ( NesHeader.byRomSize << 1 ) );
ROMBANK1 = ROMPAGE( ( ( byData << 1 ) + 1 ) % ( NesHeader.byRomSize << 1 ) );
break;
}
}
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