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/*===================================================================*/
/* */
/* Mapper 0 */
/* */
/*===================================================================*/
/*-------------------------------------------------------------------*/
/* Initialize Mapper 0 */
/*-------------------------------------------------------------------*/
void Map0_Init()
{
int nPage;
/* Initialize Mapper */
MapperInit = Map0_Init;
/* Write to Mapper */
MapperWrite = Map0_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 */
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 ( 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 0 Write Function */
/*-------------------------------------------------------------------*/
void Map0_Write( WORD wAddr, BYTE byData )
{
/*
* Dummy Write to Mapper
*
*/
}
/*-------------------------------------------------------------------*/
/* Mapper 0 Write to SRAM Function */
/*-------------------------------------------------------------------*/
void Map0_Sram( WORD wAddr, BYTE byData )
{
/*
* Dummy Write to Sram
*
*/
}
/*-------------------------------------------------------------------*/
/* Mapper 0 Write to APU Function */
/*-------------------------------------------------------------------*/
void Map0_Apu( WORD wAddr, BYTE byData )
{
/*
* Dummy Write to Apu
*
*/
}
/*-------------------------------------------------------------------*/
/* Mapper 0 Read from APU Function */
/*-------------------------------------------------------------------*/
BYTE Map0_ReadApu( WORD wAddr )
{
/*
* Dummy Read from Apu
*
*/
return ( wAddr >> 8 );
}
/*-------------------------------------------------------------------*/
/* Mapper 0 V-Sync Function */
/*-------------------------------------------------------------------*/
void Map0_VSync()
{
/*
* Dummy Callback at VSync
*
*/
}
/*-------------------------------------------------------------------*/
/* Mapper 0 H-Sync Function */
/*-------------------------------------------------------------------*/
void Map0_HSync()
{
/*
* Dummy Callback at HSync
*
*/
#if 0
// Frame IRQ
FrameStep += STEP_PER_SCANLINE;
if ( FrameStep > STEP_PER_FRAME && FrameIRQ_Enable )
{
FrameStep %= STEP_PER_FRAME;
IRQ_REQ;
APU_Reg[ 0x4015 ] |= 0x40;
}
#endif
}
/*-------------------------------------------------------------------*/
/* Mapper 0 PPU Function */
/*-------------------------------------------------------------------*/
void Map0_PPU( WORD wAddr )
{
/*
* Dummy Callback at PPU
*
*/
}
/*-------------------------------------------------------------------*/
/* Mapper 0 Rendering Screen Function */
/*-------------------------------------------------------------------*/
void Map0_RenderScreen( BYTE byMode )
{
/*
* Dummy Callback at Rendering Screen
*
*/
}
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