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RLETOABA62(1)		    General Commands Manual		 RLETOABA62(1)

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  sub-
       sequent	loading	onto the Abekas	disk.  The generated image is 768 pix-
       els 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 vec-
       tor 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

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 mod-
	      ulo 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.

1				6 February 1988			 RLETOABA62(1)

NAME | SYNOPSIS | DESCRIPTION | EXAMPLE | OPTIONS | SEE ALSO | AUTHOR | BUGS

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