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/*===================================================================*/
/* */
/* Mapper 232 : Quattro Games */
/* */
/*===================================================================*/
BYTE Map232_Regs[2];
/*-------------------------------------------------------------------*/
/* Initialize Mapper 232 */
/*-------------------------------------------------------------------*/
void Map232_Init()
{
/* Initialize Mapper */
MapperInit = Map232_Init;
/* Write to Mapper */
MapperWrite = Map232_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 );
/* Initialize Registers */
Map232_Regs[0] = 0x0C;
Map232_Regs[1] = 0x00;
/* Set up wiring of the interrupt pin */
K6502_Set_Int_Wiring( 1, 1 );
}
/*-------------------------------------------------------------------*/
/* Mapper 232 Write Function */
/*-------------------------------------------------------------------*/
void Map232_Write( WORD wAddr, BYTE byData )
{
if ( wAddr == 0x9000 ) {
Map232_Regs[0] = (byData & 0x18)>>1;
} else if ( 0xA000 <= wAddr /* && wAddr <= 0xFFFF */ ) {
Map232_Regs[1] = byData & 0x03;
}
ROMBANK0= ROMPAGE((((Map232_Regs[0]|Map232_Regs[1])<<1)+0) % (NesHeader.byRomSize<<1));
ROMBANK1= ROMPAGE((((Map232_Regs[0]|Map232_Regs[1])<<1)+1) % (NesHeader.byRomSize<<1));
ROMBANK2= ROMPAGE((((Map232_Regs[0]|0x03)<<1)+0) % (NesHeader.byRomSize<<1));
ROMBANK3= ROMPAGE((((Map232_Regs[0]|0x03)<<1)+1) % (NesHeader.byRomSize<<1));
}
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