Groups > comp.sys.ibm.ps2.hardware > #71493

What's "IBMLZRW.EXE" for?

From	Louis Ohland <ohland@charter.net>
Newsgroups	comp.sys.ibm.ps2.hardware
Subject	What's "IBMLZRW.EXE" for?
Date	2026-08-01 09:14 -0500
Organization	csiph.com Internet News Service
Message-ID	<114kuv1$11v9$1@csiph.com> (permalink)

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While confusing folks about refdisks, I was snuffling about, looking for 
a wide variety of things. SC.EXE versions, DEV129.DGS versions, string 
theory...

Looking through the 9576/9577 Diagnostics diskette,
https://ardent-tool.com/disks/7677diag.zip

  I noticed "IBMLZRW.EXE", and being a file name that I cannot EVER 
remember seeing, it drew me in.

Using a hex editor, the only human readable stuff was sparse:

USAGE: IBMLZRW [/u] [/d]
$Licensed Material - Property of IBM (C) Copyright IBM Corp. 1981, 1993 
All Rights Reserved.IBMLZRW not loaded
$IBMLZRW removed
$IBMLZRW cannot be removed
$IBMLZRW already resident

"LZRW" is a compression technique AFAIK.
http://ross.net/compression/index.html

  The author of LZRW walked away from it after some patents were 
published. Nowadays, with monstrously XBOX HUUGGEE drives and GB of RAM, 
compression is nowhere near as significant as it was.

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Thread

What's "IBMLZRW.EXE" for? Louis Ohland <ohland@charter.net> - 2026-08-01 09:14 -0500
  76/77 is the only appearance Re: What's "IBMLZRW.EXE" for? Louis Ohland <ohland@charter.net> - 2026-08-01 09:29 -0500
    Re: 76/77 is the only appearance Re: What's "IBMLZRW.EXE" for? Louis Ohland <ohland@charter.net> - 2026-08-01 09:31 -0500
      Tentative view of IBMLZRW functions Re: What's "IBMLZRW.EXE" for? Louis Ohland <ohland@charter.net> - 2026-08-02 07:09 -0500

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