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Trailing-Edge - PDP-10 Archives - BB-K818A-BM_1981 - sources/scroll.for
There are no other files named scroll.for in the archive.
C  Copyright (C) 1980, by Digital Equipment Corporation, Maynard, Mass.
C operating-system-dependent switches
C  Copyright (C) 1980, by Digital Equipment Corporation, Maynard, Mass.
C 
C 
C   			C O P Y R I G H T
C 
C 
C   		Copyright (C) 1980 by
C   		Digital Equipment Corporation, Maynard, Mass.
C 
C 
C   	This software is furnished under a license and may be used and
C   	copied  only  in accordance with the terms of such license and
C   	with the  inclusion  of  the  above  copyright  notice.   This
C   	software  or  any  other copies thereof may not be provided or
C   	otherwise made available to any other person.  No title to and
C   	ownership of the software is hereby transferred.
C 
C   	The information in this software is subject to change  without
C   	notice  and should not be construed as a commitment by Digital
C   	Equipment Corporation.
C 
C   	DIGITAL assumes no responsibility for the use  or  reliability
C   	of its software on equipment that is not supplied by DIGITAL.
C 
C 	define char byte
C  27+128
C  w(riting) opt(ion)s come groups of 8:
C 	(1) replace(0)/erase(1)/complement(2)/overlay(3)
C 	(2) negative image 0/1
C 	(3) pattern  < 256	bit mask (e.g. 192 = P11000000)
C 		    >= 256	canned pattern * 256 (e.g. 512 = P2)
C 				if value >= 256, low 8 bits are ignored
C 	(4) pattern multiplier, different from 6(?)
C 	(5) shading flag, sim pattern+ >= 10 use char
C 	(6) if shading != 0 this is y reference val
C 	(7) pixel multiplier, 1 <= value <= 10
C 	(8) alternating 0/1
C 	(9) foreground intensity, 0 <= value <= 7
C 	(10) background intensity, 0 <= value <= 7
C 
C   offsets from gwopsp...
C   Inktypes...
C   Inkolors...
C Text options
C 	RSTSONLY	define Maxgels 1000	# due to limited RAM on RSTS
C   drawing primitive gels...
C   attribute/marker/other gels...
C   writing attribute gels : Woptbase + wopindex
C   similarly topts...
C maximum # of characters in a filespec
C maximum # of characters in a command line
C max length of prompt buffer
C max number of characters in file record
C size of record buffers (Fbufsz + 1)
C 	include logdef
C ========================================================================
C ========================================================================
      integer function scroll ( amt )
      integer amt
      integer i
C string scrtwo s[,+2]
C string scrone s[,+1]
      integer scrtwo ( 7 )
      integer scrone ( 7 )
      data scrtwo ( 1 ) , scrtwo ( 2 ) , scrtwo ( 3 ) , scrtwo ( 4 ) , s
     *crtwo ( 5 ) / 115 , 91 , 44 , 43 , 50 /
      data scrtwo ( 6 ) , scrtwo ( 7 ) / 93 , 0 /
      data scrone ( 1 ) , scrone ( 2 ) , scrone ( 3 ) , scrone ( 4 ) , s
     *crone ( 5 ) / 115 , 91 , 44 , 43 , 49 /
      data scrone ( 6 ) , scrone ( 7 ) / 93 , 0 /
      if(.not.( amt .gt. 0 ))goto 23000
      scrone ( 4 ) = 43
      scrtwo ( 4 ) = 43
      i = amt
23000 continue
      if(.not.( amt .lt. 0 ))goto 23002
      scrone ( 4 ) = 45
      scrtwo ( 4 ) = 45
      i = - amt
23002 continue
      continue
23004 if(.not.(i.gt.1))goto 23006
      call putcha ( scrtwo )
23005 i=i-2
      goto 23004
23006 continue
      if(.not.( i .gt. 0 ))goto 23007
      call putcha ( scrone )
23007 continue
      scroll = 0
      return
      end
      integer function scrlup ( noargs )
      integer noargs
      call usemac ( 85 )
      scrlup = 0
      return
      end
      integer function scrldn ( noargs )
      integer noargs
      call usemac ( 68 )
      scrldn = 0
      return
      end
      integer function scrset ( noargs )
      integer noargs
      call defmac ( 85 )
      call scroll ( - 26 )
      call endmac
      call defmac ( 68 )
      call scroll ( 26 )
      call endmac
      call usemac ( 85 )
      scrset = 0
      return
      end