main.py

import signal
import sys
import threading

from cursed_vm import Asm, CursedVm


def main():
    # this is our guest program
    asm = Asm()
    asm.push_string("Hello, World!\n")  # put string on the stack
    asm.mov_rsi_rsp()  # point RSI at the string
    asm.print_loop(port=0x10)  # loop: send each char to port 0x10

    stop = threading.Event()
    signal.signal(signal.SIGINT, lambda *_: stop.set())

    def vm_thread():
        with CursedVm() as vm:
            vm.load(asm.code())
            vm.run(
                lambda port, data: (
                    sys.stdout.write(chr(data[0])) or sys.stdout.flush()
                    if port == 0x10 and len(data) == 1
                    else None
                )
            )

    t = threading.Thread(target=vm_thread, daemon=True)
    t.start()
    stop.wait()
    print("\nBye.")


if __name__ == "__main__":
    main()