Int 1A Fn F7  - Rightime V1.1 - Temporarily Disable                        [U]

   AH = F7h
Program: RighTime is a TSR by G.T. Becker which continuously adjusts the
     system time to correct for clock drift

Note:  any AH value from F0h-F7h or F9h-FEh will perform this function in
     version 1.1, but F7h is the function called by transient portion

See Also: AH=F8h,AH=FFh"RighTime"