🚀 go-pugleaf

In article <1990Jul9.232906.8904@Solbourne.COM> imp@dancer.Solbourne.COM (Warner Losh) writes:

   The reason for this is that the data doesn't exist in the same format
   as it did before you lzexeed the file.  What lzexe does is to encode
   the file using the Lempel-Zev compression algorithms (more or less)
   and then placing a loader that knows how to expand the results at the
   front of the file.  It also does relocation after it expands the file,
   but I don't know[*] if MS-DOS does the expansion or not.  Nor do I
   know if the LZ expander stays in memory or not after the program has
   been exploded.  I have never seen the source to this beast.

MS-DOS just loads the whole thing.  The loader moves the file and
itself up in memory, and then expands the file back down.  Then it
runs through the relocation table, which is has rewritten in a more
compact form.  It sets up registers just like MS-DOS does, and jumps
to the program.


--
--russ (nelson@clutx [.bitnet | .clarkson.edu])  Russ.Nelson@$315.268.6667
In Communism's central planning, citizens are told "you will make widgets".
In Capitalism's advertising, citizens are told "you will buy widgets".