forked from sin365/AxibugEmuOnline
76 lines
3.8 KiB
C++
76 lines
3.8 KiB
C++
//////////////////////////////////////////////////////////////////////////
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// Mapper235 150-in-1 //
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//////////////////////////////////////////////////////////////////////////
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void Mapper235::Reset()
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{
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for( INT i = 0; i < 0x2000; i++ ) {
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DRAM[i] = 0xFF;
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}
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SetPROM_32K_Bank( 0 );
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}
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void Mapper235::Write( WORD addr, BYTE data )
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{
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BYTE prg = ((addr&0x0300)>>3)|(addr&0x001F);
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BYTE bus = 0;
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if( PROM_8K_SIZE == 64*2 ) {
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// 100-in-1
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switch( addr & 0x0300 ) {
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case 0x0000: break;
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case 0x0100: bus = 1; break;
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case 0x0200: bus = 1; break;
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case 0x0300: bus = 1; break;
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}
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} else if( PROM_8K_SIZE == 128*2 ) {
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// 150-in-1
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switch( addr & 0x0300 ) {
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case 0x0000: break;
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case 0x0100: bus = 1; break;
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case 0x0200: prg = (prg&0x1F)|0x20; break;
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case 0x0300: bus = 1; break;
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}
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} else if( PROM_8K_SIZE == 192*2 ) {
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// 150-in-1
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switch( addr & 0x0300 ) {
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case 0x0000: break;
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case 0x0100: bus = 1; break;
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case 0x0200: prg = (prg&0x1F)|0x20; break;
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case 0x0300: prg = (prg&0x1F)|0x40; break;
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}
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} else if( PROM_8K_SIZE == 256*2 ) {
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}
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if( addr & 0x0800 ) {
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if( addr & 0x1000 ) {
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SetPROM_8K_Bank( 4, prg*4+2 );
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SetPROM_8K_Bank( 5, prg*4+3 );
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SetPROM_8K_Bank( 6, prg*4+2 );
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SetPROM_8K_Bank( 7, prg*4+3 );
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} else {
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SetPROM_8K_Bank( 4, prg*4+0 );
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SetPROM_8K_Bank( 5, prg*4+1 );
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SetPROM_8K_Bank( 6, prg*4+0 );
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SetPROM_8K_Bank( 7, prg*4+1 );
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}
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} else {
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SetPROM_32K_Bank( prg );
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}
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if( bus ) {
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SetPROM_Bank( 4, DRAM, BANKTYPE_ROM );
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SetPROM_Bank( 5, DRAM, BANKTYPE_ROM );
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SetPROM_Bank( 6, DRAM, BANKTYPE_ROM );
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SetPROM_Bank( 7, DRAM, BANKTYPE_ROM );
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}
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if( addr & 0x0400 ) {
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SetVRAM_Mirror( VRAM_MIRROR4L );
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} else if( addr & 0x2000 ) {
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SetVRAM_Mirror( VRAM_HMIRROR );
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} else {
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SetVRAM_Mirror( VRAM_VMIRROR );
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}
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}
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