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From: jtr485@umich.UUCP
Newsgroups: comp.sys.amiga,comp.sys.mac,comp.sys.m68k,comp.sys.ibm.pc
Subject: Re: Minor historical point: the origin of ms-dos
Message-ID: <43@umich.UUCP>
Date: Sun, 25-Jan-87 01:51:46 EST
Article-I.D.: umich.43
Posted: Sun Jan 25 01:51:46 1987
Date-Received: Wed, 28-Jan-87 21:43:56 EST
References: <8520@topaz.RUTGERS.EDU> <1270@cbmvax.cbmvax.cbm.UUCP> <9816UH2@PSUVM>
Organization: EECS, University of Michigan
Lines: 14
Xref: watmath comp.sys.amiga:1728 comp.sys.mac:978 comp.sys.m68k:176 comp.sys.ibm.pc:1192

In article <9816UH2@PSUVM>, uh2@psuvm.bitnet.UUCP writes:
> I believe CP/M was a clone of one of the PDP-11 operating systems,
> not TOPS-10.  Of course, TOPS and RT-11 (or whatever) are enough alike
> that it don't matter much.
> lee
Derived from RT-11.  Not a clone of.  RT-11 beats CP/M all hands down.
But RT-11 does not port well off the PDP-11 family (even if you could get
permission to try) and has advanced features not suited to 'the common
denominator'.  That is RT-11 supports more that the worst possible functioning
system available, unlike CP/M.

Of course, most of the Z80 systems were that common denom.  The pity, is that
CP/M86 and CP/M68K inherited those short comings.
--j.a.tainter