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/*===================================================================*/
/* */
/* Mapper 099 VS-Unisystem */
/* */
/*===================================================================*/
BYTE Map99_Coin;
/*-------------------------------------------------------------------*/
/* Initialize Mapper 099 */
/*-------------------------------------------------------------------*/
void Map99_Init()
{
/* Initialize Mapper */
MapperInit = Map99_Init;
/* Write to Mapper */
MapperWrite = Map0_Write;
/* Write to SRAM */
MapperSram = Map0_Sram;
/* Write to APU */
MapperApu = Map99_Apu;
/* Read from APU */
MapperReadApu = Map99_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 */
if ( NesHeader.byRomSize > 1 )
{
ROMBANK0 = ROMPAGE( 0 );
ROMBANK1 = ROMPAGE( 1 );
ROMBANK2 = ROMPAGE( 2 );
ROMBANK3 = ROMPAGE( 3 );
}
else if ( NesHeader.byRomSize > 0 )
{
ROMBANK0 = ROMPAGE( 0 );
ROMBANK1 = ROMPAGE( 1 );
ROMBANK2 = ROMPAGE( 0 );
ROMBANK3 = ROMPAGE( 1 );
} else {
ROMBANK0 = ROMPAGE( 0 );
ROMBANK1 = ROMPAGE( 0 );
ROMBANK2 = ROMPAGE( 0 );
ROMBANK3 = ROMPAGE( 0 );
}
/* Set PPU Banks */
if ( NesHeader.byVRomSize > 0 )
{
for ( int nPage = 0; nPage < 8; ++nPage )
PPUBANK[ nPage ] = VROMPAGE( nPage );
InfoNES_SetupChr();
}
Map99_Coin = 0;
/* Set up wiring of the interrupt pin */
K6502_Set_Int_Wiring( 1, 1 );
}
/*-------------------------------------------------------------------*/
/* Mapper 99 Write to APU Function */
/*-------------------------------------------------------------------*/
void Map99_Apu( WORD wAddr, BYTE byData )
{
if( wAddr == 0x4016 ) {
if( byData & 0x04 ) {
PPUBANK[ 0 ] = VROMPAGE( 8 % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 1 ] = VROMPAGE( 9 % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 2 ] = VROMPAGE( 10 % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 3 ] = VROMPAGE( 11 % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 4 ] = VROMPAGE( 12 % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 5 ] = VROMPAGE( 13 % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 6 ] = VROMPAGE( 14 % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 7 ] = VROMPAGE( 15 % ( NesHeader.byVRomSize << 3 ) );
InfoNES_SetupChr();
} else {
PPUBANK[ 0 ] = VROMPAGE( 0 % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 1 ] = VROMPAGE( 1 % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 2 ] = VROMPAGE( 2 % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 3 ] = VROMPAGE( 3 % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 4 ] = VROMPAGE( 4 % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 5 ] = VROMPAGE( 5 % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 6 ] = VROMPAGE( 6 % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 7 ] = VROMPAGE( 7 % ( NesHeader.byVRomSize << 3 ) );
InfoNES_SetupChr();
}
}
if( wAddr == 0x4020 ) {
Map99_Coin = byData;
}
}
/*-------------------------------------------------------------------*/
/* Mapper 99 Read from APU Function */
/*-------------------------------------------------------------------*/
BYTE Map99_ReadApu( WORD wAddr )
{
if( wAddr == 0x4020 ) {
return Map99_Coin;
}
return ( wAddr >> 8 );
}
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