mirror of https://github.com/bsnes-emu/bsnes.git
49 lines
828 B
C++
Executable File
49 lines
828 B
C++
Executable File
#ifdef CPU_CPP
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uint8 CPU::pio() {
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return status.pio;
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}
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bool CPU::joylatch() {
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return status.joypad_strobe_latch;
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}
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bool CPU::interrupt_pending() {
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return false;
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}
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uint8 CPU::port_read(uint8 port) {
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return port_data[port & 3];
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}
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void CPU::port_write(uint8 port, uint8 data) {
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port_data[port & 3] = data;
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}
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void CPU::op_io() {
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add_clocks(6);
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}
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uint8 CPU::op_read(unsigned addr) {
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regs.mdr = bus.read(addr);
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add_clocks(speed(addr));
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return regs.mdr;
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}
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void CPU::op_write(unsigned addr, uint8 data) {
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add_clocks(speed(addr));
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bus.write(addr, regs.mdr = data);
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}
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unsigned CPU::speed(unsigned addr) const {
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if(addr & 0x408000) {
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if(addr & 0x800000) return status.rom_speed;
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return 8;
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}
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if((addr + 0x6000) & 0x4000) return 8;
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if((addr - 0x4000) & 0x7e00) return 6;
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return 12;
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}
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#endif
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