[Coladam] More fun adventures in CP/M

Joe Blenkle jblenkle at sacnews.net
Fri Feb 19 22:05:13 CET 2010

Daniel...thanks, but that doesn't quite answer my question as to what 
program puts a "Y" in the middle of the extension name or what you need to 
uncrunch them.

I think you covered just about every other file name extension but that 

Does your paper mention CYM, DYC or BYC?


Joe B.

----- Original Message ----- 
From: "Daniel Bienvenu" <newcoleco at yahoo.fr>
To: <coladam at adamcon.org>; "Joe Blenkle" <jblenkle at sacnews.net>
Sent: Friday, February 19, 2010 11:51 AM
Subject: Re : [Coladam] More fun adventures in CP/M

The following came from a paper titled "Everything you wanted to know to 
start you off with CP/M". It confirms your supposition about compression.

With CP/M, to get the listing of the files, you'll type DIR<Ret> and this is 
what you might see :-

A:> FILENAME.COM (Runnable file)
A:> FILENAME.BAK (Backup file)
A:> FILENAME.LBR (Library file)
A:> FILENAME.DOC (Documentation file)
A:> FILENAME.ARK (Archive file similar to library file but further 
compressed - use UNARCxx.COM to decompress)
A:> FILENAME.DZC (Crunched file - use UNCR.COM to decompress)
A:> FILENAME.DQC (Squeezed file - use UNSQ.COM to decompress)

You may find that a library file will contain a number of compressed files. 
These will have to be DELIBed and then decompressed in 2 seperate moves. 
Generally archived files can be extracted and decompressed in one move which 
is the main advantage of archive over library files.

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