Date   : Tue, 06 Jun 1989 18:10:46 BST
From   : P.G.NEWMAN%aberdeen.ac.uk@NSFnet-Relay.AC.UK
Subject: CP/M versions

As a newcomer to the CP/M public domain scene, I am bemused by  
the apparent number of versions of the CP/M operating system
around.  Those I have come across (many in the Simtel archives) 
include CP/M, CP/M 80, CP/M 86, CP/M concurrent, CP/M 68K and   
CP/M Plus, not to mention CP/M versions 1.4, 2.0, 2.2 and 3.0.  I   
believe all were put out by Digital Research?  I am using an
Amstrad PCW8512, which is supplied with CP/M Plus.  I gather this   
is the same as v.3.0, although not entirely compatible with 
earlier versions?  Can anyone perhaps explain the origin of all 
these CP/M's, and advise me which versions are compatible with my   
CP/M Plus?  
    
Any replies to the list, please, or direct to the following address,
marked "Re: CP/M" in Subject: field. Thanks, David. 
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