Fwd: 80UN unpack, decompress any CP/M archive/compression

[Joseph Travis]

This is a very cool utility written by a member of the s100 group that can decompress files that used various techniques from "back in the day".  Click on the link for 'source' and download '80un.com'. Be sure to read 'README' for all the info.  The program was written / compiled using PLM.

Joe

---------- Forwarded message ---------

On Thursday, December 18, 2025 at 7:18:15 PM UTC-5 aaron wohl wrote:

note: this was written in pl/m using the new uplm80 (pip install uplm80) compiler
runs on cpm 80un.com
runs on linux (pip install 80un)
source https://github.com/avwohl/80un

Undo any cp/m packing/compressing:
.ARC
.LBR
Squeeze (.?Q?) | test.dqc
Crunch (.?Z?)  | test.lzt
LZH (.?Y?)     | test.aym

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[norberto.collado koyado.com]

Nice! How do you compress under CP/M?

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[Joseph Travis]

Using any of the old programs (SQ, ARC, LU, PACK, etc.) from back in the day.

This program was written to undo all of the various old compression methods.  A lot of software available on the innerwebs was saved using these old methods and they're not compatible with one another.

Joe

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