Beginning with IRAF V2.11 the OIF image format was changed to
accomodate a longer pixel file pathname, as well as to allow or a machine
independent image format.  Consequently the new "V2" IRAF images are no
longer readable in pre-V2.11 IRAF systems, although V2.11 can still read
images written on older versions.  The MKV1 task converts V2.11 V2 image
formats to the V1 image format allowing the image to be read on older
versions.  The one caution is that because of the limitation on the pixfile
path in pre-V2.11 systems, this task will truncate pixfile paths exceeding
about 63 chars in length (including the node! prefix).  There is a comp-
limentary task called MKV2 in the same source which converts the V1 images
to V2 format (e.g. so you can then move them to a byte-swapped machine
running V2.11 which can read them).

To compile and install the tasks:

	1] Unpack the shar file containing the task in a directory to contain
	   the source, binary, and parameter file:

		% mkdir ~/iraf/mkv1		# create task directory
		% cd ~/iraf/mkv1		# go there
		% sh -x /<path>/mkv1.shar	# unpack shar file

	2] Compile the executable:
	
		% xc -z mkv1.x -lxtools

	   This binary MUST be compiled using a V2.11 system so that the V2
	   format can be read.  Linking '-z' however means that the resulting
	   binary can be used from either a V2.11 or V2.10 system.

	3] Declare the task in your login.cl or loginuser.cl file:

		task mkv1 = home$iraf/mkv1/mkv1.e
		task mkv2 = home$iraf/mkv1/mkv1.e

	   be sure the path to this binary is correct and that the 'mkv1.par'
	   and 'mkv2.par' file is installed in that directory.

To run the tasks:

	cl> mkv1 *.imh
	cl> mkv2 *.imh

Each task takes as input a list of images and converts it in-place.
This task has not been extensively tested, if you have any problems or
questions feel free to contact iraf@noao.edu.