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/*===================================================================*/
/* */
/* Mapper 58 */
/* */
/*===================================================================*/
/*-------------------------------------------------------------------*/
/* Initialize Mapper 58 */
/*-------------------------------------------------------------------*/
void Map58_Init()
{
/* Initialize Mapper */
MapperInit = Map58_Init;
/* Write to Mapper */
MapperWrite = Map58_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 = ROMPAGE( 0 );
ROMBANK3 = ROMPAGE( 1 );
/* 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 58 Write Function */
/*-------------------------------------------------------------------*/
void Map58_Write( WORD wAddr, BYTE byData )
{
if( wAddr & 0x40 ) {
ROMBANK0 = ROMPAGE((((wAddr&0x07)<<1)+0) % (NesHeader.byRomSize<<1));
ROMBANK1 = ROMPAGE((((wAddr&0x07)<<1)+1) % (NesHeader.byRomSize<<1));
ROMBANK2 = ROMPAGE((((wAddr&0x07)<<1)+0) % (NesHeader.byRomSize<<1));
ROMBANK3 = ROMPAGE((((wAddr&0x07)<<1)+1) % (NesHeader.byRomSize<<1));
} else {
ROMBANK0 = ROMPAGE((((wAddr&0x06)<<1)+0) % (NesHeader.byRomSize<<1));
ROMBANK1 = ROMPAGE((((wAddr&0x06)<<1)+1) % (NesHeader.byRomSize<<1));
ROMBANK2 = ROMPAGE((((wAddr&0x06)<<1)+2) % (NesHeader.byRomSize<<1));
ROMBANK3 = ROMPAGE((((wAddr&0x06)<<1)+3) % (NesHeader.byRomSize<<1));
}
if ( NesHeader.byVRomSize > 0 ) {
PPUBANK[ 0 ] = VROMPAGE(((wAddr&0x38)+0) % (NesHeader.byVRomSize<<3));
PPUBANK[ 1 ] = VROMPAGE(((wAddr&0x38)+1) % (NesHeader.byVRomSize<<3));
PPUBANK[ 2 ] = VROMPAGE(((wAddr&0x38)+2) % (NesHeader.byVRomSize<<3));
PPUBANK[ 3 ] = VROMPAGE(((wAddr&0x38)+3) % (NesHeader.byVRomSize<<3));
PPUBANK[ 4 ] = VROMPAGE(((wAddr&0x38)+4) % (NesHeader.byVRomSize<<3));
PPUBANK[ 5 ] = VROMPAGE(((wAddr&0x38)+5) % (NesHeader.byVRomSize<<3));
PPUBANK[ 6 ] = VROMPAGE(((wAddr&0x38)+6) % (NesHeader.byVRomSize<<3));
PPUBANK[ 7 ] = VROMPAGE(((wAddr&0x38)+7) % (NesHeader.byVRomSize<<3));
InfoNES_SetupChr();
}
if( byData & 0x02 ) InfoNES_Mirroring( 1 );
else InfoNES_Mirroring( 0 );
}
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