 
      The TCU-150 from Digital Pathways is a real time calander clock
 which does not forget the time(for up to 3 months) when the power is
 turned off on the computer.  Two support tasks are provided to utilize 
 its capabilities: one to set the system time automatically and one to
 update the internal time of the  TCU-150.
 
      Further HELP is provided with the keywords
 
		CSR		CSR registers for the TCU-150
		TIMSET		Automatically setting the system time.
		SETTIM		Setting the internal TCU-150 time.
 
2	CSR
 
			15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
  760770  YR/MO/DAY	!         YEAR      !   MONTH    !    DAY      !
  760772  HR/MINS        -  -  - !     HOUR    ! -  -  !     MINUTE    !
  760774  SECONDS        -  -  -  -  -  -  -  -  -  -  !     SECOND    !
  760776  READ STATUS    H  Y  -  -  -  -  -  -  R  -  -  -  -  -  -  -

  where		-	bit unused
		Y	Year/Month/Day being set
		H	Hour/Minute being set
		R	TCU-150 ready

     Each of the registers is read only except when setting the TCU-150.
 To set the TCU-150, setting any value in either the YR/MO/DAY or HR/MINS
 register will cause the data in that register to rapidly cycle.  Placing any
 data into the SECONDS register will cause the rapid cycling to stop.

2	TIMSET

     TIMSET is a small privleged task(only rebuild it if CSR's for TCU-150
 change) which gets the time from the TCU-150, creates a TIME command and
 SPAWNS the command to MCR.  It will only work from a privileged terminal.

2	SETTIM

     To set the TCU-150's internal clock, first correctly set the system time
 using the MCR TIME command, 

		eg.	TIME  10:31:40  25-SEP-79

 Then  RUN $SETTIM.  SETTIM will do a GTIM$ directive to get the system time
 and then set the TCU-150 system clock.  SETTIM should be run at a higher
 priority than any other user tasks so that it will not be stopped until it
 sets the time and exits.

