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/*===================================================================*/
/* */
/* Mapper 119 : TQ-ROM */
/* */
/*===================================================================*/
BYTE Map119_Reg[8];
BYTE Map119_Prg0, Map119_Prg1;
BYTE Map119_Chr01, Map119_Chr23, Map119_Chr4, Map119_Chr5, Map119_Chr6, Map119_Chr7;
BYTE Map119_WeSram;
BYTE Map119_IRQ_Enable;
BYTE Map119_IRQ_Counter;
BYTE Map119_IRQ_Latch;
/*-------------------------------------------------------------------*/
/* Initialize Mapper 119 */
/*-------------------------------------------------------------------*/
void Map119_Init()
{
/* Initialize Mapper */
MapperInit = Map119_Init;
/* Write to Mapper */
MapperWrite = Map119_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 = Map119_HSync;
/* Callback at PPU */
MapperPPU = Map0_PPU;
/* Callback at Rendering Screen ( 1:BG, 0:Sprite ) */
MapperRenderScreen = Map0_RenderScreen;
/* Set SRAM Banks */
SRAMBANK = SRAM;
/* Set Registers */
for( int i = 0; i < 8; i++ ) {
Map119_Reg[i] = 0x00;
}
/* Set ROM Banks */
Map119_Prg0 = 0;
Map119_Prg1 = 1;
Map119_Set_CPU_Banks();
/* Set PPU Banks */
Map119_Chr01 = 0;
Map119_Chr23 = 2;
Map119_Chr4 = 4;
Map119_Chr5 = 5;
Map119_Chr6 = 6;
Map119_Chr7 = 7;
Map119_Set_PPU_Banks();
Map119_WeSram = 0; // Disable
Map119_IRQ_Enable = 0; // Disable
Map119_IRQ_Counter = 0;
Map119_IRQ_Latch = 0;
/* Set up wiring of the interrupt pin */
K6502_Set_Int_Wiring( 1, 1 );
}
/*-------------------------------------------------------------------*/
/* Mapper 119 Write Function */
/*-------------------------------------------------------------------*/
void Map119_Write( WORD wAddr, BYTE byData )
{
switch( wAddr & 0xE001 ) {
case 0x8000:
Map119_Reg[0] = byData;
Map119_Set_CPU_Banks();
Map119_Set_PPU_Banks();
break;
case 0x8001:
Map119_Reg[1] = byData;
switch( Map119_Reg[0] & 0x07 ) {
case 0x00:
if( NesHeader.byVRomSize > 0 ) {
Map119_Chr01 = byData & 0xFE;
Map119_Set_PPU_Banks();
}
break;
case 0x01:
if( NesHeader.byVRomSize > 0 ) {
Map119_Chr23 = byData & 0xFE;
Map119_Set_PPU_Banks();
}
break;
case 0x02:
if( NesHeader.byVRomSize > 0 ) {
Map119_Chr4 = byData;
Map119_Set_PPU_Banks();
}
break;
case 0x03:
if( NesHeader.byVRomSize > 0 ) {
Map119_Chr5 = byData;
Map119_Set_PPU_Banks();
}
break;
case 0x04:
if( NesHeader.byVRomSize > 0 ) {
Map119_Chr6 = byData;
Map119_Set_PPU_Banks();
}
break;
case 0x05:
if( NesHeader.byVRomSize > 0 ) {
Map119_Chr7 = byData;
Map119_Set_PPU_Banks();
}
break;
case 0x06:
Map119_Prg0 = byData;
Map119_Set_CPU_Banks();
break;
case 0x07:
Map119_Prg1 = byData;
Map119_Set_CPU_Banks();
break;
}
break;
case 0xA000:
Map119_Reg[2] = byData;
if( !ROM_FourScr ) {
if( byData & 0x01 ) InfoNES_Mirroring( 0 );
else InfoNES_Mirroring( 1 );
}
break;
case 0xA001:
Map119_Reg[3] = byData;
break;
case 0xC000:
Map119_Reg[4] = byData;
Map119_IRQ_Counter = byData;
break;
case 0xC001:
Map119_Reg[5] = byData;
Map119_IRQ_Latch = byData;
break;
case 0xE000:
Map119_Reg[6] = byData;
Map119_IRQ_Enable = 0;
Map119_IRQ_Counter = Map119_IRQ_Latch;
break;
case 0xE001:
Map119_Reg[7] = byData;
Map119_IRQ_Enable = 1;
break;
}
}
/*-------------------------------------------------------------------*/
/* Mapper 119 H-Sync Function */
/*-------------------------------------------------------------------*/
void Map119_HSync()
{
if( ( /* PPU_Scanline >= 0 && */ PPU_Scanline <= 239) ) {
if( PPU_R1 & R1_SHOW_SCR || PPU_R1 & R1_SHOW_SP ) {
if( Map119_IRQ_Enable ) {
if( !(Map119_IRQ_Counter--) ) {
Map119_IRQ_Counter = Map119_IRQ_Latch;
IRQ_REQ;
}
}
}
}
}
/*-------------------------------------------------------------------*/
/* Mapper 119 Set CPU Banks Function */
/*-------------------------------------------------------------------*/
void Map119_Set_CPU_Banks()
{
if( Map119_Reg[0] & 0x40 ) {
ROMBANK0 = ROMLASTPAGE( 1 );
ROMBANK1 = ROMPAGE( Map119_Prg1 % ( NesHeader.byRomSize << 1 ) );
ROMBANK2 = ROMPAGE( Map119_Prg0 % ( NesHeader.byRomSize << 1 ) );
ROMBANK3 = ROMLASTPAGE( 0 );
} else {
ROMBANK0 = ROMPAGE( Map119_Prg0 % ( NesHeader.byRomSize << 1 ) );
ROMBANK1 = ROMPAGE( Map119_Prg1 % ( NesHeader.byRomSize << 1 ) );
ROMBANK2 = ROMLASTPAGE( 1 );
ROMBANK3 = ROMLASTPAGE( 0 );
}
}
/*-------------------------------------------------------------------*/
/* Mapper 119 Set PPU Banks Function */
/*-------------------------------------------------------------------*/
void Map119_Set_PPU_Banks()
{
if( Map119_Reg[0]&0x80 ) {
if(Map119_Chr4&0x40) PPUBANK[ 0 ] = CRAMPAGE(Map119_Chr4&0x07);
else PPUBANK[ 0 ] = VROMPAGE(Map119_Chr4 % (NesHeader.byRomSize<<1));
if(Map119_Chr5&0x40) PPUBANK[ 1 ] = CRAMPAGE(Map119_Chr5&0x07);
else PPUBANK[ 1 ] = VROMPAGE(Map119_Chr5 % (NesHeader.byRomSize<<1));
if(Map119_Chr6&0x40) PPUBANK[ 2 ] = CRAMPAGE(Map119_Chr6&0x07);
else PPUBANK[ 2 ] = VROMPAGE(Map119_Chr6 % (NesHeader.byRomSize<<1));
if(Map119_Chr7&0x40) PPUBANK[ 3 ] = CRAMPAGE(Map119_Chr7&0x07);
else PPUBANK[ 3 ] = VROMPAGE(Map119_Chr7 % (NesHeader.byRomSize<<1));
if((Map119_Chr01+0)&0x40) PPUBANK[ 4 ] = CRAMPAGE((Map119_Chr01+0)&0x07);
else PPUBANK[ 4 ] = VROMPAGE((Map119_Chr01+0) % (NesHeader.byVRomSize<<3));
if((Map119_Chr01+1)&0x40) PPUBANK[ 5 ] = CRAMPAGE((Map119_Chr01+1)&0x07);
else PPUBANK[ 5 ] = VROMPAGE((Map119_Chr01+1) % (NesHeader.byVRomSize<<3));
if((Map119_Chr23+0)&0x40) PPUBANK[ 6 ] = CRAMPAGE((Map119_Chr23+0)&0x07);
else PPUBANK[ 6 ] = VROMPAGE((Map119_Chr23+0) % (NesHeader.byVRomSize<<3));
if((Map119_Chr23+1)&0x40) PPUBANK[ 7 ] = CRAMPAGE((Map119_Chr23+1)&0x07);
else PPUBANK[ 7 ] = VROMPAGE((Map119_Chr23+1) % (NesHeader.byVRomSize<<3));
} else {
if((Map119_Chr01+0)&0x40) PPUBANK[ 0 ] = CRAMPAGE((Map119_Chr01+0)&0x07);
else PPUBANK[ 0 ] = VROMPAGE((Map119_Chr01+0) % (NesHeader.byVRomSize<<3));
if((Map119_Chr01+1)&0x40) PPUBANK[ 1 ] = CRAMPAGE((Map119_Chr01+1)&0x07);
else PPUBANK[ 1 ] = VROMPAGE((Map119_Chr01+1) % (NesHeader.byVRomSize<<3));
if((Map119_Chr23+0)&0x40) PPUBANK[ 2 ] = CRAMPAGE((Map119_Chr23+0)&0x07);
else PPUBANK[ 2 ] = VROMPAGE((Map119_Chr23+0) % (NesHeader.byVRomSize<<3));
if((Map119_Chr23+1)&0x40) PPUBANK[ 3 ] = CRAMPAGE((Map119_Chr23+1)&0x07);
else PPUBANK[ 3 ] = VROMPAGE((Map119_Chr23+1) % (NesHeader.byVRomSize<<3));
if(Map119_Chr4&0x40) PPUBANK[ 4 ] = CRAMPAGE(Map119_Chr4&0x07);
else PPUBANK[ 4 ] = VROMPAGE(Map119_Chr4 % (NesHeader.byVRomSize<<3));
if(Map119_Chr5&0x40) PPUBANK[ 5 ] = CRAMPAGE(Map119_Chr5&0x07);
else PPUBANK[ 5 ] = VROMPAGE(Map119_Chr5 % (NesHeader.byVRomSize<<3));
if(Map119_Chr6&0x40) PPUBANK[ 6 ] = CRAMPAGE(Map119_Chr6&0x07);
else PPUBANK[ 6 ] = VROMPAGE(Map119_Chr6 % (NesHeader.byVRomSize<<3));
if(Map119_Chr7&0x40) PPUBANK[ 7 ] = CRAMPAGE(Map119_Chr7&0x07);
else PPUBANK[ 7 ] = VROMPAGE(Map119_Chr7 % (NesHeader.byVRomSize<<3));
}
InfoNES_SetupChr();
}
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