450(1)                              CLIX                              450(1)



  NAME

    450 - Handles special functions of DASI 450 terminal

  SYNOPSIS

    450

  DESCRIPTION

    The 450 command supports special functions of, and optimizes the use of,
    the DASI 450 terminal, or any terminal that is functionally identical,
    such as the Diablo 1620 or Xerox 1700.  It converts half-line forward,
    half-line reverse, and full-line reverse motions to the correct vertical
    motions.  It attempts to draw Greek letters and other special symbols in
    the same manner as 300.  It should be noted that, unless your system
    contains DOCUMENTER'S WORKBENCH Software, certain commands (for example,
    eqn, nroff, tbl, and so on) will not work.  Use 450 to print equations
    neatly, in the sequence:

    neqn file ...  nroff 450

    CAUTION:  make sure that the PLOT switch on your terminal is ON before
    using 450.  The SPACING switch should be put in the desired position
    (either 10- or 12-pitch).  In either case, vertical spacing is 6
    lines/inch, unless dynamically changed to 8 lines per inch by an
    appropriate escape sequence.

    Use 450 with the nroff -s flag or .rd requests when it is necessary to
    insert paper manually or change fonts in the middle of a document.
    Instead of hitting the return key in these cases, you must use the
    linefeed key to get any response.

    In many (but not all) cases, the use of 450 can be eliminated in favor of
    one of the following:

    nroff -T450 files ...

    or

    nroff -T450 -12 files ...

    The use of 450 can thus often be avoided unless special delays or options
    are required; in a few cases, however, the additional movement
    optimization of 450 may produce better-aligned output.

    The neqn names of, and resulting output for, the Greek and special
    characters supported by 450 are shown in greek.

  EXAMPLES




  2/94 - Intergraph Corporation                                              1

  450(1)                              CLIX                              450(1)



    To interpret input for a DASI 450 terminal, enter the following:

    ... nroff | 450


  NOTES

    Some special characters cannot be correctly printed in column 1 because
    the print head cannot be moved to the left from there.

    If your output contains Greek and/or reverse linefeeds, use a friction-
    feed platen instead of a forms tractor; although good enough for drafts,
    the latter has a tendency to slip when reversing direction, distorting
    Greek characters and misaligning the first line of text after one or more
    reverse linefeeds.

  EXIT VALUES

    The 450 command returns a value of 0 if successful.  If unsuccessful, one
    of the following values will be returned:

    1   The stdout is not a terminal.

    2   An error occured when opened output terminal for read.

    3   The output terminal did not respond to ETX.

    4   The output terminal did not respond with ACK.

  RELATED INFORMATION

    Commands: 300(1), greek(1), mesg(1), stty(1), tabs(1), tbl(1), graph(1),
    tplot(1), eqn(1), nroff(1)





















  2                                              Intergraph Corporation - 2/94