Artifact 92697489bab0c63ec1b2e196a7d38206879d32cdbe88d43cb41ce550a673bb80:

• File psl-1983/emode/tty-size.sl — part of check-in [eb17ceb7f6] at 2020-04-21 19:40:01 on branch master — Add Reduce 3.0 to the historical section of the archive, and some more
  files relating to version sof PSL from the early 1980s. Thanks are due to
  Paul McJones and Nelson Beebe for these, as well as to all the original
  authors.

  git-svn-id: https://svn.code.sf.net/p/reduce-algebra/code/historical@5328 2bfe0521-f11c-4a00-b80e-6202646ff360 (user: arthurcnorman@users.sourceforge.net, size: 676) [annotate] [blame] [check-ins using] [more...]

%  JSYS call to get dimensions of "TTY" screen.
% Written by M. L. Griss.  Modifications by William Galway.

% **** SubField should be included as part of the JSYS system? ****
% Return a subfield from a "word".  (Bit 0 is leftmost on DEC-20.)
% (FieldSize might be better?)

(DM SubField (args)
  `(Land ,(indx args 3)
      (LSH ,(indx args 1)
        (difference ,(indx args 2)
          35))))

% Return JFN mode word for terminal.
(DE TTyWord ()
  (JSYS2 8#101 0 0 0 8#107))                            % jsRFMOD

% Return system's idea of the terminal's "page length".
(DE PageLength ()
  (SubField (TTyWord) 10 8#177))

(DE PageWidth ()
  (SubField (TTyWord) 17 8#177))