.ENABLE SUBSTITUTION
	.DISABLE DISPLAY
	.ENABLE QUIET
	.TESTFILE TI:
	.PARSE <FILSPC> ":" DEV DUM
	.IF DEV NE "TT0" .GOTO NOTTT0
	.EXIT
.NOTTT0:
	DMO /USER
	.TEST DEV "VT"
	.IF <STRLEN> NE 0 .EXIT
	.XQT BYB		! Break off of Micom port