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/*===================================================================*/
/* */
/* Mapper 230 : 22-in-1 */
/* */
/*===================================================================*/
BYTE Map230_RomSw;
/*-------------------------------------------------------------------*/
/* Initialize Mapper 230 */
/*-------------------------------------------------------------------*/
void Map230_Init()
{
/* Initialize Mapper */
MapperInit = Map230_Init;
/* Write to Mapper */
MapperWrite = Map230_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;
/* Initialize Registers */
if( Map230_RomSw ) {
Map230_RomSw = 0;
} else {
Map230_RomSw = 1;
}
/* Set ROM Banks */
if( Map230_RomSw ) {
ROMBANK0 = ROMPAGE( 0 );
ROMBANK1 = ROMPAGE( 1 );
ROMBANK2 = ROMPAGE( 14 );
ROMBANK3 = ROMPAGE( 15 );
} else {
ROMBANK0 = ROMPAGE( 16 );
ROMBANK1 = ROMPAGE( 17 );
ROMBANK2 = ROMLASTPAGE( 1 );
ROMBANK3 = ROMLASTPAGE( 0 );
}
/* Set up wiring of the interrupt pin */
K6502_Set_Int_Wiring( 1, 1 );
}
/*-------------------------------------------------------------------*/
/* Mapper 230 Write Function */
/*-------------------------------------------------------------------*/
void Map230_Write( WORD wAddr, BYTE byData )
{
if( Map230_RomSw ) {
ROMBANK0 = ROMPAGE((((byData&0x07)<<1)+0) % (NesHeader.byRomSize<<1));
ROMBANK1 = ROMPAGE((((byData&0x07)<<1)+1) % (NesHeader.byRomSize<<1));
} else {
if( byData & 0x20 ) {
ROMBANK0 = ROMPAGE((((byData&0x1F)<<1)+16) % (NesHeader.byRomSize<<1));
ROMBANK1 = ROMPAGE((((byData&0x1F)<<1)+17) % (NesHeader.byRomSize<<1));
ROMBANK2 = ROMPAGE((((byData&0x1F)<<1)+16) % (NesHeader.byRomSize<<1));
ROMBANK3 = ROMPAGE((((byData&0x1F)<<1)+17) % (NesHeader.byRomSize<<1));
} else {
ROMBANK0 = ROMPAGE((((byData&0x1E)<<1)+16) % (NesHeader.byRomSize<<1));
ROMBANK1 = ROMPAGE((((byData&0x1E)<<1)+17) % (NesHeader.byRomSize<<1));
ROMBANK2 = ROMPAGE((((byData&0x1E)<<1)+18) % (NesHeader.byRomSize<<1));
ROMBANK3 = ROMPAGE((((byData&0x1E)<<1)+19) % (NesHeader.byRomSize<<1));
}
if( byData & 0x40 ) {
InfoNES_Mirroring( 1 );
} else {
InfoNES_Mirroring( 0 );
}
}
}
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