NAME
      rletoabA62 - Convert from RLE Format to
      Abekas A62 Dump Format

 SYNOPSIS
      rletoabA62 [ -N ] [ -f n ] [ -n n ] [ infile ]

 DESCRIPTION
      RletoabA62 converts a raster file in the Utah
      Raster Toolkit RLE format into a format
      suitable for writing to an Abekas A62 dump
      tape and subsequent loading onto the Abekas
      disk.  The generated image is 768 pixels wide
      and 512 pixels high.  If the input is larger,
      it is truncated.  If it is smaller, it is
      padded on the top and right with black.  The
      output is written to stdout, and should be
      written to a tape in 24K byte blocks with dd
      as in the following:      dd of=/dev/rmt8
      obs=24k Normally, the output is processed
      with a simple digital filter; this feature
      may be turned off with an option.  RletoabA62
      normally writes two consecutive frames,
      normally starting at frame 1.  Input is taken
      from stdin unless a file name is given on the
      command line.  Only a single file may be
      given, and so if multiple invocations of
      rletoabA62 are performed in a script, care
      must be taken to tell the program to convert
      the data for the proper Abekas frame number
      (1-4).  Otherwise, the colors will appear
      wrong; they will be rotated on a vector scope
      diagram.

 EXAMPLE
      The following example converts all files
      ending in .rle in the current directory and
      writes them to a tape.  Two frames are
      written per image and the frame number is
      incremented accordingly.
                frame=1
                number=2
                for file in *.rle
                do
                     rletoabA62 -f $frame $file
                     frame=`expr \( \( $frame - 1
                \) + $number \) % 4 + 1`
                done |
                dd of=/dev/rmt8 obs=24k

9
 OPTIONS
      Options are parsed by getopt(3).

      -N   Do not apply digital filtering.

      -f n Create the first frame as Abekas frame
           number n, having a value from one to
           four.  Consecutive frames increment this
           number modulo four.  The default is one.

      -n n Write n frames of output, incrementing
           the frame number each time.  The default
           is two.

 SEE ALSO
      urt(1), RLE(5).

 AUTHOR
      Bob Brown, RIACS.

 BUGS
      This program does not preserve the aspect
      ratio of the input.



























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