mirror of https://github.com/bsnes-emu/bsnes.git
28 lines
839 B
C++
28 lines
839 B
C++
//20000-fffff
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auto Cartridge::romRead(uint20 addr) -> uint8 {
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if(!rom.data) return 0x00;
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uint28 offset;
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switch(addr.byte(2)) {
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case 2: offset = r.romBank0 << 16 | addr.bits(0,15); break; //20000-2ffff
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case 3: offset = r.romBank1 << 16 | addr.bits(0,15); break; //30000-3ffff
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default: offset = r.romBank2 << 20 | addr.bits(0,19); break; //40000-fffff
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}
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return rom.data[offset & rom.mask];
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}
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auto Cartridge::romWrite(uint20 addr, uint8 data) -> void {
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}
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//10000-1ffff
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auto Cartridge::ramRead(uint20 addr) -> uint8 {
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if(!ram.data) return 0x00;
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uint24 offset = r.sramBank << 16 | addr.bits(0,15);
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return ram.data[offset & ram.mask];
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}
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auto Cartridge::ramWrite(uint20 addr, uint8 data) -> void {
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if(!ram.data) return;
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uint24 offset = r.sramBank << 16 | addr.bits(0,15);
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ram.data[offset & ram.mask] = data;
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}
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