From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID autolearn=no autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,f25e853f410d55da X-Google-Attributes: gid103376,public X-Google-Thread: 1014db,88e117cf43230b41 X-Google-Attributes: gid1014db,public X-Google-Thread: 109fba,88e117cf43230b41 X-Google-Attributes: gid109fba,public X-Google-Thread: f8c65,88e117cf43230b41 X-Google-Attributes: gidf8c65,public X-Google-Thread: 1008e3,88e117cf43230b41 X-Google-Attributes: gid1008e3,public From: grante@visi.com (Grant Edwards) Subject: Re: M2 history - relations to Ada Date: 1999/02/05 Message-ID: <4Ruu2.3162$NN.150859@ptah.visi.com>#1/1 X-Deja-AN: 440875404 References: <78abg4$cnc$1@its.hooked.net> <78i8s4$hth$1@its.hooked.net> <78iq2m$br9$1@nnrp1.dejanews.com> <794gg7$ib$1@nnrp1.dejanews.com> <7963q0$ail$1@nnrp1.dejanews.com> <7973lb$mdl$1@remarQ.com> <797hjv$ivm$1@nnrp1.dejanews.com> <7992oe$ram$1@remarQ.com> <79bp1n$fd5$1@remarQ.com> <87ww1x3ogi.fsf@mihalis.ix.netcom.com> Followup-To: comp.lang.ada,comp.lang.c,comp.lang.c++,comp.lang.modula2,comp.lang.modula3 X-Complaints-To: abuse@visi.com X-Trace: ptah.visi.com 918190528 209.98.98.8 (Thu, 04 Feb 1999 22:55:28 CDT) Organization: Vector Internet Services, Inc. NNTP-Posting-Date: Thu, 04 Feb 1999 22:55:28 CDT Newsgroups: comp.lang.ada,comp.lang.c,comp.lang.c++,comp.lang.modula2,comp.lang.modula3 Date: 1999-02-05T00:00:00+00:00 List-Id: Chris Morgan (mihalis@ix.netcom.com) wrote: : > Just one small point of clarification about this "history:" : > Gates didn't write DOS. Microsoft, which had been writing language : > translators -- e.g., BASIC and FORTRAN -- _bought_ DOS from Seattle Computer : > Products. : : Didn't SCP nickname it QDOS or "quick and dirty operating system" and : wasn't it just a rip off of CP/M? Definitely. The FCB structure was almost identical, the layout of .com files was the same. You could call BIOS routines by doing a jump to address 0005 just like CP/M. The systems calls were the same as CP/M, etc. Of course, parts of CP/M were pretty transparently borrowed from RSTS and possibly other systems at DEC (which is where Gary Kildall worked before he became Digital Research and started selling CP/M). -- Grant Edwards grante@visi.com