···4040 # Enable read access to the host's RTC.
4141 rtc = 1
42424343+ # When a CGA compatible video card is selected, start up
4444+ # in 40 column mode.
4545+ cga40 = 0
4646+4347 # Patch the main BIOS before the emulator starts running.
4448 # If this option is set, the main BIOS is patched to use
4549 # a custom initialization routine.