bsnes/higan/processor/m68k/m68k.cpp

#include <processor/processor.hpp>
#include "m68k.hpp"

namespace Processor {

enum : uint { Byte, Word, Long };
enum : bool { Reverse = 1 };

#include "registers.cpp"
#include "memory.cpp"
#include "effective-address.cpp"
#include "instructions.cpp"
#include "disassembler.cpp"
#include "instruction.cpp"

auto M68K::power() -> void {
}

auto M68K::reset() -> void {
  instructionsExecuted = 0;

  for(auto& dr : r.d) dr = 0;
  for(auto& ar : r.a) ar = 0;
  r.sp = 0;
  r.pc = 0;

  r.c = 0;
  r.v = 0;
  r.z = 0;
  r.n = 0;
  r.x = 0;
  r.i = 7;
  r.s = 1;
  r.t = 0;

  r.stop = false;
  r.reset = false;
}

auto M68K::supervisor() -> bool {
  if(r.s) return true;

  r.pc -= 2;
  exception(Exception::Unprivileged, Vector::Unprivileged);
  return false;
}

auto M68K::exception(uint exception, uint vector) -> void {
  auto pc = r.pc;
  auto sr = readSR();

  r.s = 1;
  r.t = 0;

  push<Long>(pc);
  push<Word>(sr);

  r.pc = read<Long>(vector << 2);
}

}