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diff --git a/sys/imio/iki/fxf/fxfpak.x b/sys/imio/iki/fxf/fxfpak.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+ 
+include	<syserr.h>
+include <mach.h>
+include "fxf.h"
+
+
+# FXF_PAK_DATA -- Convert npix elements of type pixtype as needed for storage
+# in a FITS file.  All floating point data will be converted to IEEE format.
+# The input and output buffers may be the same if desired.
+
+procedure fxf_pak_data (ibuf, obuf, npix, pixtype)
+
+char    ibuf[ARB]		#I input data buffer
+char    obuf[ARB]		#I output data buffer
+int	npix			#I number of pixels in buffer
+int	pixtype			#I input pixel datatype
+
+int	nbytes, nchars
+errchk	syserr
+
+include <szpixtype.inc>
+
+begin
+	### Possibly the MII conversion routines should be used here as
+	### they handle all these datatypes (except maybe ushort).
+
+	nchars = npix * pix_size[pixtype]
+	nbytes = nchars * SZB_CHAR
+
+	switch (pixtype) {
+	case TY_USHORT:
+	    call fxf_altmu (ibuf, obuf, npix)
+	    if (BYTE_SWAP2 == YES)
+		call bswap2 (obuf, 1, obuf, 1, nbytes)
+
+	case TY_SHORT:
+	    if (BYTE_SWAP2 == YES)
+		call bswap2 (ibuf, 1, obuf, 1, nbytes)
+	    else
+		call amovc (ibuf, obuf, nchars)
+
+	case TY_INT, TY_LONG:
+	    if (BYTE_SWAP4 == YES)
+		call bswap4 (ibuf, 1, obuf, 1, nbytes)
+	    else
+		call amovc (ibuf, obuf, nchars)
+
+	case TY_REAL:
+	    call ieevpakr (ibuf, obuf, npix)
+
+	case TY_DOUBLE:
+	    call ieevpakd (ibuf, obuf, npix)
+
+	default:
+	   call syserr (SYS_FXFPKDTYP)
+	}
+end