SX
	Connect a serial peripheral (terminal, see cabling instructions in sxapp.c)
        Install SX
	Activate SX in accessoires
1	Draw a checkmark on the titlebar to bring up the option sheet
		Choose "Serial"
			Set the communications port if different from default
			Set other metrics, baudrate etc.
			Apply
			Check that "Status" is "Connected"
				If not check cable
		Write text in the input pad and 'Send' it.
			Check it arrived at connected serial peripheral.
				If not, check baudrate, parity etc
		Send text from serial peripheral
			Check it is displayed in textview window
				if not, and in debug mode, check subtask
				is running in minidebugger (name is SXSR),
				check baudrate, parity etc.

		If possible, go to '1' and select different metrics both
		in serial card and peripheral. Test with those settings.

2	Draw a checkmark on the titlebar to bring up the option sheet
		Choose "Serial"
			Set metrics, baudrate etc different from the defaults
			Apply & close

	Exit SX
	Start SX
	Draw a checkmark on the titlebar to bring up the option sheet.
		Choose "Serial"
			Make sure set metrics are preserved
