mirror of https://github.com/bsnes-emu/bsnes.git
28 lines
1.3 KiB
C++
28 lines
1.3 KiB
C++
auto CPU::read(uint24 address) -> uint8 {
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if(address < 0x000100) return 0xff;
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if(address < 0x004000) return 0xff;
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if(address < 0x007000) return cpu.ram.read((uint14)address);
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if(address < 0x008000) return apu.ram.read((uint12)address);
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if(address < 0x00c000) return vpu.ram.read((uint14)address);
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if(address < 0x200000) return 0xff;
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if(address < 0x400000) return cartridge.read(0, (uint21)address);
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if(address < 0x800000) return 0xff;
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if(address < 0xa00000) return cartridge.read(1, (uint21)address);
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if(address < 0xff0000) return 0xff;
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return system.bios.read((uint16)address);
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}
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auto CPU::write(uint24 address, uint8 data) -> void {
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if(address < 0x000100) return;
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if(address < 0x004000) return;
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if(address < 0x007000) return cpu.ram.write((uint14)address, data);
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if(address < 0x008000) return apu.ram.write((uint12)address, data);
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if(address < 0x00c000) return vpu.ram.write((uint14)address, data);
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if(address < 0x200000) return;
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if(address < 0x400000) return cartridge.write(0, (uint21)address, data);
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if(address < 0x800000) return;
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if(address < 0xa00000) return cartridge.write(1, (uint21)address, data);
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if(address < 0xff0000) return;
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return system.bios.write((uint16)address, data);
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}
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