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=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable autolearn_force=no version=3.4.4 X-Received: by 2002:a5e:8c0f:: with SMTP id n15-v6mr409925ioj.0.1539840252597; Wed, 17 Oct 2018 22:24:12 -0700 (PDT) X-Received: by 2002:a9d:43:: with SMTP id 61mr279522ota.3.1539840252331; Wed, 17 Oct 2018 22:24:12 -0700 (PDT) Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!feeder.eternal-september.org!feeder.erje.net!2.eu.feeder.erje.net!feeder.usenetexpress.com!feeder-in1.iad1.usenetexpress.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!x98-v6no141949ita.0!news-out.google.com!l70-v6ni185itb.0!nntp.google.com!x98-v6no141944ita.0!postnews.google.com!glegroupsg2000goo.googlegroups.com!not-for-mail Newsgroups: comp.lang.ada Date: Wed, 17 Oct 2018 22:24:11 -0700 (PDT) In-Reply-To: Complaints-To: groups-abuse@google.com Injection-Info: glegroupsg2000goo.googlegroups.com; posting-host=136.163.203.5; posting-account=g0yTkgoAAADdZGEYyZahxGlO3EkjH0Wv NNTP-Posting-Host: 136.163.203.5 References: <63bee5dc-51c0-4092-8e46-69e0301f1427@googlegroups.com> User-Agent: G2/1.0 MIME-Version: 1.0 Message-ID: <0d52eb25-7a3a-420b-a958-9b73d8ac277f@googlegroups.com> Subject: Re: Least Dangerous Way to Do This ? From: Petter Fryklund Injection-Date: Thu, 18 Oct 2018 05:24:12 +0000 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Xref: reader02.eternal-september.org comp.lang.ada:54623 Date: 2018-10-17T22:24:11-07:00 List-Id: > Well, the actual machine code is very weird; it was weird enough that the= y=20 > provided our project with a guy whose main job was to figure out what was= =20 > happening at the lowest level and feed it back to the rest of us working = in=20 > the "normal" world. I regard(ed) 1100/2200 as the normal world ;-), it is (was) everything else= that is weird. For instance, until much later I didn't know about little-e= ndian, still weird to me. I was almost brought up with 1100, since I got he= ad-hunted together with 27 other people directly from University.=20 Traditional machine-code like early 1100 is very nice. I love traditional L= MJ, Load Modifier and Jump, which loaded the return address in the modifier= part of a X (index) register and jumped to the specified location. The cal= led routine could then return to an offset of the X register where 0 was us= ually the normal return and others different error returns. The X register = could also do automatic increments and decrements when used. The Modifier p= art was added to the other part if a bit in the instruction was set. We nee= ded all 36 bits of the instructions for different purposes including part-w= ord operations. The ability to have for different banks directly visible (m= aybe later there where more?) and possibility to change any of them with ju= st one or two instructions was very neat. Those where the days. I agree that the new what-ever-it-was-called, I bet new, was a bit ..., but= not weird ;-)=20 But 1991 I "had" to learn Ada, which I have used most of the time since.=20 Regards, Petter=20