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/*===================================================================*/
/* */
/* Mapper 188 (Bandai) */
/* */
/*===================================================================*/
BYTE Map188_Dummy[ 0x2000 ];
/*-------------------------------------------------------------------*/
/* Initialize Mapper 188 */
/*-------------------------------------------------------------------*/
void Map188_Init()
{
/* Initialize Mapper */
MapperInit = Map188_Init;
/* Write to Mapper */
MapperWrite = Map188_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 = Map188_Dummy;
/* Set ROM Banks */
if ( ( NesHeader.byRomSize << 1 ) > 16 )
{
ROMBANK0 = ROMPAGE( 0 );
ROMBANK1 = ROMPAGE( 1 );
ROMBANK2 = ROMPAGE( 14 );
ROMBANK3 = ROMPAGE( 15 );
} else {
ROMBANK0 = ROMPAGE( 0 );
ROMBANK1 = ROMPAGE( 1 );
ROMBANK2 = ROMLASTPAGE( 1 );
ROMBANK3 = ROMLASTPAGE( 0 );
}
/* Magic Code */
Map188_Dummy[ 0 ] = 0x03;
/* Set up wiring of the interrupt pin */
K6502_Set_Int_Wiring( 1, 1 );
}
/*-------------------------------------------------------------------*/
/* Mapper 188 Write Function */
/*-------------------------------------------------------------------*/
void Map188_Write( WORD wAddr, BYTE byData )
{
/* Set ROM Banks */
if ( byData )
{
if ( byData & 0x10 )
{
byData = ( byData & 0x07 ) << 1;
ROMBANK0 = ROMPAGE( ( byData + 0 ) % ( NesHeader.byRomSize << 1 ) );
ROMBANK1 = ROMPAGE( ( byData + 1 ) % ( NesHeader.byRomSize << 1 ) );
} else {
byData <<= 1;
ROMBANK0 = ROMPAGE( ( byData + 16 ) % ( NesHeader.byRomSize << 1 ) );
ROMBANK1 = ROMPAGE( ( byData + 17 ) % ( NesHeader.byRomSize << 1 ) );
}
}
else
{
if ( ( NesHeader.byRomSize << 1 ) == 0x10 )
{
ROMBANK0 = ROMPAGE( 14 );
ROMBANK1 = ROMPAGE( 15 );
} else {
ROMBANK0 = ROMPAGE( 16 );
ROMBANK1 = ROMPAGE( 17 );
}
}
}
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