"CP/M compatible" vs. "MS-DOS Compatible" machines? - test-drb@ccmp.vtda.org

5 Feb 2008

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Subject: Re: "CP/M compatible" vs. "MS-DOS Compatible" machines?
   From: "Roy J. Tellason" <rtellason at verizon.net>
   Date: Tue, 05 Feb 2008 02:20:29 -0500
     To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>

On Monday 04 February 2008 14:48, Chuck Guzis wrote:
  I wanted to add a "put that diskette
back" alarm to my CP/M
 implementation when there were files opened for writing 
:-) 
Fortunately it at least did a check for a changed disk.

...
   It was then
that I discovered that CP/M made no attempt to track open
 files and indeed, the behavior of many programs depended on this. 
It wasn't really much of an OS,  compared to a lot of what else was out there. 
I'd argue that CPM is barely an OS annd a should be catagorized as a 
filesystem and monitor.  there are thing it doesn't manage.  For some 
without all the IO bells implemented the IO is notably poor.

Allison