:::::::::::::: :: USVSENSE :: :::::::::::::: (only sysop, only DOS) Syntax: USV(SENSE) [ 0 | 1 ] (default: 0) If the BBS computer is connected to a USV, the BBS can be switched off via pin 15 of LPT1 port through alarm line of USV: pin 15 high (TTL, 5 V) -> BBS is running pin 15 low (TTL, 0 V) -> BBS is shutdown If USVSENSE is set to 1 the function is activated, if set to 0 the USV function is disabled.