Help making boot image for "mkfs proto"

[Lee A. Butler]

According to the Xenix manuals you can use mkfs with a prototype file, and
the first item in this file is the boot program for the first sector of
the disk.  Has anyone been successful at compiling, linking, and writing
the boot image?  I can easily compile and link, but getting the resulting
file into the proper format for mkfs to write seems to be impossible.  There
seems to be some bizzare combination of header, magic number, and offset of
transfer address within the file that I can't get right.  Help!
-- 
Lee A. Butler			      Internet: butler at stsci.edu
Space Telescope Science Institute	BITNET: BUTLER at STSCI
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