130 lines
5.3 KiB
C++
130 lines
5.3 KiB
C++
//////////////////////////////////////////////////////////////////////////
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// Mapper068 SunSoft (After Burner II) //
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//////////////////////////////////////////////////////////////////////////
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void Mapper068::Reset()
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{
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reg[0] = reg[1] = reg[2] = reg[3] = 0;
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coin = 0;
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SetPROM_32K_Bank( 0, 1, PROM_8K_SIZE-2, PROM_8K_SIZE-1 );
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}
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#if 0
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BYTE Mapper068::ExRead( WORD addr )
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{
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if( addr == 0x4020 ) {
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DEBUGOUT( "RD $4020:%02X\n", coin );
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return coin;
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}
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return addr>>8;
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}
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void Mapper068::ExWrite( WORD addr, BYTE data )
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{
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if( addr == 0x4020 ) {
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DEBUGOUT( "WR $4020:%02X\n", data );
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coin = data;
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}
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}
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#endif
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void Mapper068::Write( WORD addr, BYTE data )
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{
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switch( addr & 0xF000 ) {
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case 0x8000:
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SetVROM_2K_Bank( 0, data );
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break;
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case 0x9000:
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SetVROM_2K_Bank( 2, data );
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break;
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case 0xA000:
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SetVROM_2K_Bank( 4, data );
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break;
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case 0xB000:
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SetVROM_2K_Bank( 6, data );
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break;
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case 0xC000:
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reg[2] = data;
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SetBank();
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break;
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case 0xD000:
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reg[3] = data;
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SetBank();
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break;
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case 0xE000:
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reg[0] = (data & 0x10)>>4;
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reg[1] = data & 0x03;
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SetBank();
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break;
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case 0xF000:
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SetPROM_16K_Bank( 4, data );
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break;
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}
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}
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void Mapper068::SetBank()
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{
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if( reg[0] ) {
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switch( reg[1] ) {
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case 0:
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SetVROM_1K_Bank( 8, (INT)reg[2]+0x80 );
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SetVROM_1K_Bank( 9, (INT)reg[3]+0x80 );
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SetVROM_1K_Bank( 10, (INT)reg[2]+0x80 );
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SetVROM_1K_Bank( 11, (INT)reg[3]+0x80 );
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break;
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case 1:
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SetVROM_1K_Bank( 8, (INT)reg[2]+0x80 );
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SetVROM_1K_Bank( 9, (INT)reg[2]+0x80 );
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SetVROM_1K_Bank( 10, (INT)reg[3]+0x80 );
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SetVROM_1K_Bank( 11, (INT)reg[3]+0x80 );
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break;
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case 2:
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SetVROM_1K_Bank( 8, (INT)reg[2]+0x80 );
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SetVROM_1K_Bank( 9, (INT)reg[2]+0x80 );
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SetVROM_1K_Bank( 10, (INT)reg[2]+0x80 );
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SetVROM_1K_Bank( 11, (INT)reg[2]+0x80 );
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break;
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case 3:
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SetVROM_1K_Bank( 8, (INT)reg[3]+0x80 );
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SetVROM_1K_Bank( 9, (INT)reg[3]+0x80 );
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SetVROM_1K_Bank( 10, (INT)reg[3]+0x80 );
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SetVROM_1K_Bank( 11, (INT)reg[3]+0x80 );
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break;
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}
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} else {
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switch( reg[1] ) {
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case 0:
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SetVRAM_Mirror( VRAM_VMIRROR );
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break;
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case 1:
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SetVRAM_Mirror( VRAM_HMIRROR );
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break;
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case 2:
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SetVRAM_Mirror( VRAM_MIRROR4L );
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break;
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case 3:
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SetVRAM_Mirror( VRAM_MIRROR4H );
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break;
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}
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}
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}
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void Mapper068::SaveState( LPBYTE p )
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{
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p[0] = reg[0];
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p[1] = reg[1];
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p[2] = reg[2];
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p[3] = reg[3];
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}
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void Mapper068::LoadState( LPBYTE p )
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{
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reg[0] = p[0];
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reg[1] = p[1];
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reg[2] = p[2];
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reg[3] = p[3];
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}
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