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/*===================================================================*/
/* */
/* Mapper 191 : SACHEN Super Cartridge Xin1 (Ver.1-9), Q-BOY Support */
/* */
/*===================================================================*/
BYTE Map191_Reg[8];
BYTE Map191_Prg0, Map191_Prg1;
BYTE Map191_Chr0, Map191_Chr1, Map191_Chr2, Map191_Chr3;
BYTE Map191_Highbank;
/*-------------------------------------------------------------------*/
/* Initialize Mapper 191 */
/*-------------------------------------------------------------------*/
void Map191_Init()
{
/* Initialize Mapper */
MapperInit = Map191_Init;
/* Write to Mapper */
MapperWrite = Map0_Write;
/* Write to SRAM */
MapperSram = Map0_Sram;
/* Write to APU */
MapperApu = Map191_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 */
for( int i = 0; i < 8; i++ ) {
Map191_Reg[i] = 0x00;
}
/* Set ROM Banks */
Map191_Prg0 = 0;
// Map191_Prg1 = 1;
Map191_Set_CPU_Banks();
/* Set PPU Banks */
Map191_Chr0 = 0;
Map191_Chr1 = 0;
Map191_Chr2 = 0;
Map191_Chr3 = 0;
Map191_Highbank = 0;
Map191_Set_PPU_Banks();
/* Set up wiring of the interrupt pin */
K6502_Set_Int_Wiring( 1, 1 );
}
/*-------------------------------------------------------------------*/
/* Mapper 191 Write to APU Function */
/*-------------------------------------------------------------------*/
void Map191_Apu( WORD wAddr, BYTE byData )
{
switch( wAddr ) {
case 0x4100:
Map191_Reg[0]=byData;
break;
case 0x4101:
Map191_Reg[1]=byData;
switch( Map191_Reg[0] ) {
case 0:
Map191_Chr0=byData&7;
Map191_Set_PPU_Banks();
break;
case 1:
Map191_Chr1=byData&7;
Map191_Set_PPU_Banks();
break;
case 2:
Map191_Chr2=byData&7;
Map191_Set_PPU_Banks();
break;
case 3:
Map191_Chr3=byData&7;
Map191_Set_PPU_Banks();
break;
case 4:
Map191_Highbank=byData&7;
Map191_Set_PPU_Banks();
break;
case 5:
Map191_Prg0=byData&7;
Map191_Set_CPU_Banks();
break;
case 7:
if( byData & 0x02 ) InfoNES_Mirroring( 0 );
else InfoNES_Mirroring( 1 );
break;
}
break;
}
}
/*-------------------------------------------------------------------*/
/* Mapper 191 Set CPU Banks Function */
/*-------------------------------------------------------------------*/
void Map191_Set_CPU_Banks()
{
ROMBANK0 = ROMPAGE( ((Map191_Prg0<<2) + 0 ) % ( NesHeader.byRomSize << 1 ) );
ROMBANK1 = ROMPAGE( ((Map191_Prg0<<2) + 1 ) % ( NesHeader.byRomSize << 1 ) );
ROMBANK2 = ROMPAGE( ((Map191_Prg0<<2) + 2 ) % ( NesHeader.byRomSize << 1 ) );
ROMBANK3 = ROMPAGE( ((Map191_Prg0<<2) + 3 ) % ( NesHeader.byRomSize << 1 ) );
};
/*-------------------------------------------------------------------*/
/* Mapper 191 Set PPU Banks Function */
/*-------------------------------------------------------------------*/
void Map191_Set_PPU_Banks()
{
if ( NesHeader.byVRomSize > 0 ) {
PPUBANK[ 0 ] = VROMPAGE( ((((Map191_Highbank<<3)+Map191_Chr0)<<2)+0 ) % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 1 ] = VROMPAGE( ((((Map191_Highbank<<3)+Map191_Chr0)<<2)+1 ) % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 2 ] = VROMPAGE( ((((Map191_Highbank<<3)+Map191_Chr1)<<2)+2 ) % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 3 ] = VROMPAGE( ((((Map191_Highbank<<3)+Map191_Chr1)<<2)+3 ) % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 4 ] = VROMPAGE( ((((Map191_Highbank<<3)+Map191_Chr2)<<2)+0 ) % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 5 ] = VROMPAGE( ((((Map191_Highbank<<3)+Map191_Chr2)<<2)+1 ) % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 6 ] = VROMPAGE( ((((Map191_Highbank<<3)+Map191_Chr3)<<2)+2 ) % ( NesHeader.byVRomSize << 3 ) );
PPUBANK[ 7 ] = VROMPAGE( ((((Map191_Highbank<<3)+Map191_Chr3)<<2)+3 ) % ( NesHeader.byVRomSize << 3 ) );
InfoNES_SetupChr();
}
}
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