300, 300S(1g,C)             AIX Commands Reference              300, 300S(1g,C)



-------------------------------------------------------------------------------
300, 300s



PURPOSE

Handles special line-motion functions for DASI 300/300s work stations.

SYNTAX


 one of
+------+   +-- -d3,90,30 --+
| 300  |---| +-----------+ |
| 300s |   +-| +12       |-+
+------+    ^| -num      ||
            || -dt,len,c ||
            |+-----------+|
            +-------------+


Note:  This command does not have MBCS support.

DESCRIPTION

Note:  If your work station has a PLOT switch, make sure this switch is turned
       "on" before using this command.

The 300 command reads standard input, processes its input for printing on the
DASI 300, GSI 300, or DTC 300 work stations, and writes to standard output.
The 300s command performs the same functions for the DASI 300s, GSI 300s, and
DTC 300s.  They convert the input files' motion control characters for
half-line forward, half-line reverse, and full-line reverse into motion
commands recognized by these work stations.

You can use the 300 and 300s commands to draw Greek characters and other
special symbols that require more than one vertical line, and it allows you to
use 12-pitch text.  For a discussion of special symbols and Greek characters
supported by 300, see "greek."

The nroff command can be used with the 300 command to format text.  300 must be
used if you use special delays or formatting options.  You can either pipe from
nroff to 300 or use the -T300 flag with nroff to specify the printing device.
The movement control of the 300 command usually produces better aligned output
than nroff -T300.

When using nroff, the -s flag or .rd requests are required for inserting paper
manually or changing fonts in the middle of a document.  In these cases, you
must press the line feed key to continue printing.





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300, 300S(1g,C)             AIX Commands Reference              300, 300S(1g,C)



Using the 300 command with the neqn command gives you the best display of your
equations.  You can use the following sequence to display equations:

  neqn file... | nroff | 300

Note:  Some special characters cannot be correctly printed in column 1 because
       the print head cannot be moved to the left from that position.

If your output contains Greek characters or reverse line feeds, use a
friction-feed platen instead of a forms tractor.  A forms tractor slips when
reversing direction.

FLAGS

-dt,len,c    Controls output delay factors.  The default setting is -d3,90,30.
             DASI 300 is too slow to handle very long lines, too many tab
             characters, or long strings with no blanks and no identical
             characters.  One null character is inserted in a line for every
             set of t tabs, and for every contiguous string of c nonblank,
             nontab characters.  When a line is longer than len bytes, several
             nulls (the line length divided by 20, plus one) are inserted at
             the end of that line.  In all three cases, the nulls delay the
             output enough to avoid a problem.  Items can be omitted from the
             end of the list, implying the default values.  Entering zero for t
             results in insertion of two null bytes per tab, while entering
             zero for c results in insertion of two null bytes per character.

             When printing C Language programs, using "-d0,1" helps adjust for
             the many indentation levels.  When printing files like
             /etc/passwd, using "-d3,30,5" helps print it properly.

             This flag affects carriage return and line feed delays.  The stty
             parameters nl0 cr2 or nl0 cr3 are recommended for most uses.

-num         Controls the size of half-line spacing.  The default half-line
             values (which are exact half-lines) of num are:

             10-pitch, 6 lines-per-inch, num=4
             12-pitch, 8 lines-per-inch, num=3
             12-pitch, 6 lines-per-inch, num=4

             You can use other values for num to change the appearance of
             subscripts and superscripts.  For example, -2 makes nroff
             half-lines act like quarter-lines.

+12          Uses 12-pitch, 6 lines-per-inch text.  The DASI 300 normally
             allows only two combinations:  10-pitch, 6 lines per inch, or
             12-pitch, 8 lines per inch.  To use the 12-pitch, 6 lines-per-inch
             combination, set the PITCH switch to "12" and use the +12 flag on
             the command line.





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300, 300S(1g,C)             AIX Commands Reference              300, 300S(1g,C)



RELATED INFORMATION

See the following commands:  "450,"  "eqn, neqn, checkeq,"  "graph," "nroff,
troff,"  "tbl," and  "tplot."

See the Greek miscellaneous facility in AIX Operating System Technical
Reference.
















































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