Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!watmath!clyde!rutgers!im4u!ut-sally!seismo!mcnc!gatech!cuae2!ihnp4!chinet!steinmetz!davidsen
From: davidsen@steinmetz.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: Minor historical point: the origin of ms-dos
Message-ID: <1178@steinmetz.steinmetz.UUCP>
Date: Thu, 5-Feb-87 11:07:33 EST
Article-I.D.: steinmet.1178
Posted: Thu Feb  5 11:07:33 1987
Date-Received: Sun, 8-Feb-87 04:02:09 EST
References: <8520@topaz.RUTGERS.EDU> <1270@cbmvax.cbmvax.cbm.UUCP> <2955@watdcsu.UUCP> <1001@gould9.UUCP>
Reply-To: davidsen@kbsvax.UUCP (william E Davidsen)
Organization: General Electric CRD, Schenectady, NY
Lines: 18


When I upgraded my S100 system from Z80 to 8086, I was a Seattle
dealer. The first cut of the o/s was called "QDOS" (quick and
dirty operating system), and was similar to DOS1.0, which is an
attempt to look like CP/M-86. I later bought a generic version
of CP/M-86 and ported it to my machine, rolling my own BIOS. It
took me an entire weekend to get it working!

The main difference was that QDOS had a flat file system, while
CP/M-86 had 16 "user numbers". Think of that as 16
subdirectories names 0-15. Programs in user 0 could be executed
from anywhere on the disk. Enough on origins, already, it makes
me feel old.
-- 
bill davidsen			sixhub \
      ihnp4!seismo!rochester!steinmetz ->  crdos1!davidsen
				chinet /
ARPA: davidsen%crdos1.uucp@crd.ge.com (or davidsen@crd.ge.com)