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CLEAR.FOR
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1988-02-08
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2KB
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83 lines
SUBROUTINE CLEAR
C*
C* *******************************
C* *******************************
C* ** **
C* ** CLEAR **
C* ** **
C* *******************************
C* *******************************
C*
C* SUBPROGRAM :
C* CLEAR SCREEN
C*
C* AUTHOR :
C* ART RAGOSTA
C* MS 207-5
C* AMES RESEARCH CENTER
C* MOFFETT FIELD, CA 94035
C* (415) 694-5578
C*
C* PURPOSE :
C* CLEAR A CRT SCREEN OR ADVANCE THE PAGE ON A HARDCOPY TERMINAL
C*
C* METHODOLOGY :
C* USES VMS UTILITY. COMMENTED, TRANSPORTABLE VERSION SENDS
C* <ESC><FF>.
C*
C* INPUT ARGUMENTS :
C* NONE
C*
C* OUTPUT ARGUMENTS :
C* NONE
C*
C* INTERNAL WORK AREAS :
C* NONE
C*
C* COMMON BLOCKS :
C* NONE
C*
C* FILE REFERENCES :
C* 6 - OUTPUT UNIT FOR TRANSPORTABLE VERSION.
C* ( COULD BE PARAMETERIZED TO NUNIT )
C*
C* DATA BASE ACCESS :
C* NONE
C*
C* SUBPROGRAM REFERENCES :
C* LIB$ERASE_PAGE
C*
C* ERROR PROCESSING :
C* NONE
C*
C* TRANSPORTABILITY LIMITATIONS :
C* THE PRESENT VERSION USES THE VAX-SPECIFIC ROUTINE,LIB$ERASE_PAGE
C* A MORE TRANSPORTABLE, BUT LESS INFALLIBLE, VERSION IS COMMENTED
C*
C* ASSUMPTIONS AND RESTRICTIONS :
C* NONE
C*
C* LANGUAGE AND COMPILER :
C* ANSI FORTRAN 77
C*
C* VERSION AND DATE :
C* VERSION I.0 31-AUG-84
C*
C* CHANGE HISTORY :
C* 31-AUG-84 INITIAL VERSION
C*
C***********************************************************************
C*
CHARACTER *1 ESC
DATA ESC/27/
ISTAT = LIB$ERASE_PAGE(1,1)
C
C WRITE(6,900)ESC,CHAR(12)
C900 FORMAT(2A1)
C
RETURN
END
C
C---END CLEAR
C