bsnes/higan/fc/cpu/cpu.cpp

46 lines
905 B
C++

#include <fc/fc.hpp>
namespace Famicom {
#include "memory.cpp"
#include "timing.cpp"
#include "serialization.cpp"
CPU cpu;
auto CPU::Enter() -> void {
while(true) scheduler.synchronize(), cpu.main();
}
auto CPU::main() -> void {
if(io.interruptPending) return interrupt();
instruction();
}
auto CPU::step(uint clocks) -> void {
Thread::step(clocks);
synchronize(apu);
synchronize(ppu);
synchronize(cartridge);
for(auto peripheral : peripherals) synchronize(*peripheral);
}
auto CPU::power(bool reset) -> void {
MOS6502::BCD = 0;
MOS6502::power();
create(CPU::Enter, system.frequency());
if(!reset) for(auto& data : ram) data = 0xff;
ram[0x008] = 0xf7; //todo: what is this about?
ram[0x009] = 0xef;
ram[0x00a] = 0xdf;
ram[0x00f] = 0xbf;
r.pc.byte(0) = bus.read(0xfffc);
r.pc.byte(1) = bus.read(0xfffd);
memory::fill(&io, sizeof(IO));
io.rdyLine = 1;
}
}