Trailing-Edge
-
PDP-10 Archives
-
decus_20tap4_198111
-
decus/20-0125/lpon.for
There is 1 other file named lpon.for in the archive. Click here to see a list.
SUBROUTINE LPON
C************************************************************
C
C THIS ROUTINE IS USED TO ENABLE THE LIGHT PEN.
C
C POSSIBLE ERRORS:
C ?INVALID REPLY TO LPON COMMAND
C
C ROUTINES CALLED:
C SEND - SENDS A COMMAND TO THE GT40
C GET - RECEIVES A STATUS TRANSMISSION FROM THE GT40
C ERROR - ERROR LOGGING ROUTINE
C
C************************************************************
IMPLICIT INTEGER (A - Z)
100 CALL SEND(7, 0, 0, 0)
CALL GET(STATUS, X, Y, DNUM)
IF(STATUS .EQ. "66) GO TO 100
IF(STATUS .EQ. 0) RETURN
CALL ERROR('?INVALID REPLAY TO LPON, STATUS =',STATUS)
RETURN
END