DOS code in CP/M? Revisited...

Kip Koon computerdoc at
Thu Jul 14 00:53:25 CDT 2016

Hi Eric,
Hum, I wonder where Gary got his ideas?  Didn't he use a DEC PDP-nn for his initial PL/M compiler to get the first CP/M built in the first place?  I'd like to find out more about TOPS-10, OS-8 and RT-11.  
Very interesting indeed!  

Kip Koon
computerdoc at

> -----Original Message-----
> From: cctalk [mailto:cctalk-bounces at] On Behalf Of Eric Smith
> Sent: Thursday, July 14, 2016 1:28 AM
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: Re: DOS code in CP/M? Revisited...
> On Wed, Jul 13, 2016 at 10:32 PM, Kip Koon <computerdoc at> wrote:
> > Back in my twenties, I was reading about CP/M in the college library where I attended > thinking,  "Wow!  CP/M looks EXACTLY like
> MS-DOS!"
> And if you'd read about DEC operating systems, you'd have thought that CP/M looks like TOPS-10, OS-8, and RT-11, though not quite
> as "EXACTLY" as MS-DOS looks like CP/M.
> "Bad artists copy, great artists steal." - Pablo Picasso

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