GHCM

This program is a fairly flexible system for producing hardcopy from a VT240
or VT125 ReGIS graphics terminal.  It "reads back" the sixelized form of
the graphic in a form suitable for printing on an LN03 or LA50 printer (note
that LA100s, and LA200s don't have the correct aspect ratio).

Usage:

Define it as a foreign command, and specify parameter #1 as the input (Regis)
file, parameter #2 as the (optional) sixel output file.  If parameter #2 is
not defined, AND the /SELECT option is specified, then a series of output
files of the form <input-name>.nn is produced.

Command Qualifiers:

 /form  adds a formfeed between graphs
 /trim (untested) takes away any left margin

Parameter qualifiers:

 /select=(list) list of ordinal plot numbers to actually make a hardcopy of

NOTE:  Designed for Datatrieve graphs, where the whole graphic is defined
between the "begin graph" and "end graph" escape sequences.

EXAMPLE:

  $ ghcm /form  regis.out/select=(2,4,6,16) regis.lis

BUGS:

You will find that it "doesn't work" if nonpaged pool is fragmented, giving
the error message DATAOVERUN.  Complain to the system manager, or reboot
the VAX, or both.  Your attempts to exit after this will fail, so type in
ctrl-[ and \ several times in succession to exit the program.
