mirror of https://github.com/bsnes-emu/bsnes.git
50 lines
1006 B
C++
50 lines
1006 B
C++
auto CPU::readRAM(uint11 addr) -> uint8 {
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return ram[addr];
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}
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auto CPU::writeRAM(uint11 addr, uint8 data) -> void {
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ram[addr] = data;
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}
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auto CPU::readIO(uint16 addr) -> uint8 {
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switch(addr) {
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case 0x4016: {
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auto data = Famicom::peripherals.controllerPort1->data();
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return (mdr() & 0xc0) | data.bit(2) << 4 | data.bit(1) << 3 | data.bit(0) << 0;
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}
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case 0x4017: {
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auto data = Famicom::peripherals.controllerPort2->data();
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return (mdr() & 0xc0) | data.bit(2) << 4 | data.bit(1) << 3 | data.bit(0) << 0;
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}
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}
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return apu.readIO(addr);
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}
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auto CPU::writeIO(uint16 addr, uint8 data) -> void {
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switch(addr) {
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case 0x4014: {
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io.oamdmaPage = data;
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io.oamdmaPending = true;
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return;
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}
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case 0x4016: {
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Famicom::peripherals.controllerPort1->latch(data.bit(0));
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Famicom::peripherals.controllerPort2->latch(data.bit(0));
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return;
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}
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}
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return apu.writeIO(addr, data);
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}
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auto CPU::readDebugger(uint16 addr) -> uint8 {
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return bus.read(addr);
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}
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