Artifact 56125e192df04ef57153a861f62fc132d0975c8db7f33c1eb79f38e35f3aa565:

• File psl-1983/emode/aaa.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: 1934) [annotate] [blame] [check-ins using] [more...]

%
% AAA.SL - EMODE support for Ann Arbor Ambassador terminals (nearly
% identical to DEC VT100).
% 
% Author:      William F. Galway
%              Symbolic Computation Group
%              Computer Science Dept.
%              University of Utah
% Date:        27 June 1982
% Copyright (c) 1982 University of Utah
%

% Screen starts at (0,0), and other corner is offset by (79,47)  (total
% dimensions are 80 wide by 48 down).  This corresponds to the values that
% seem popular at the University of Utah CS Department.  With a bit more
% work, we might change the driver so that it set up the screen dimensions
% by transmitting the appropriate character sequence to the terminal.
(setf ScreenBase (Coords 0 0))
(setf ScreenDelta (Coords 79 47))

% Parity mask is used to clear "parity bit" for those terminals that don't
% have a meta key.  It should be 8#177 in that case.  Should be 8#377 for
% terminals with a meta key.
(setf parity_mask 8#377)

(DE EraseScreen ()
  (progn
    % First, erase the screen
    (PBOUT (Char ESC))
    (PBOUT (Char ![))
    (PBOUT (Char 2))
    (PBOUT (Char J))

    % then put the cursor at "home".
    (SetTerminalCursor 0 0)))

(DE Ding ()
  (PBOUT (Char Bell)))

% Clear to end of line from current position (inclusive).
(DE TerminalClearEol ()
  (progn
    (PBOUT (Char ESC))
    (PBOUT (Char ![))
    (PBOUT (char !0))
    (PBOUT (Char K))))

% Move physical cursor to Column,Row
(DE SetTerminalCursor (ColLoc RowLoc)
  (progn
    (PBOUT (char ESC))
    (PBOUT (Char ![))
    % Use "quick and dirty" conversion to decimal digits.
    (PBOUT (plus (char 0) (quotient (add1 RowLoc) 10)))
    (PBOUT (plus (char 0) (remainder (add1 RowLoc) 10)))

    % Delimiter between row digits and column digits.
    (PBOUT (char !;))

    (PBOUT (plus (char 0) (quotient (add1 ColLoc) 10)))
    (PBOUT (plus (char 0) (remainder (add1 ColLoc) 10)))

    (PBOUT (char H))     % Terminate the sequence
    ))