From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=MAILING_LIST_MULTI autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 23891 invoked from network); 17 Dec 2022 03:44:17 -0000 Received: from minnie.tuhs.org (50.116.15.146) by inbox.vuxu.org with ESMTPUTF8; 17 Dec 2022 03:44:17 -0000 Received: from minnie.tuhs.org (localhost [IPv6:::1]) by minnie.tuhs.org (Postfix) with ESMTP id 9C567423E0; Sat, 17 Dec 2022 13:43:40 +1000 (AEST) Received: from lists.tip.net.au (lists.tip.net.au [203.10.76.3]) by minnie.tuhs.org (Postfix) with ESMTPS id E2A5D423B1 for ; Sat, 17 Dec 2022 13:43:34 +1000 (AEST) Received: from [192.168.1.2] (124-148-125-119.dyn.iinet.net.au [124.148.125.119]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mailhost.tip.net.au (Postfix) with ESMTPSA id 4NYsHp3ClLz9QfG; Sat, 17 Dec 2022 14:43:01 +1100 (AEDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.21\)) From: steve jenkin In-Reply-To: Date: Sat, 17 Dec 2022 14:42:59 +1100 Content-Transfer-Encoding: quoted-printable Message-Id: References: To: Douglas McIlroy X-Mailer: Apple Mail (2.3445.104.21) Message-ID-Hash: HMAXDTWHGT6BKKTHPKV272W23X3ISE2U X-Message-ID-Hash: HMAXDTWHGT6BKKTHPKV272W23X3ISE2U X-MailFrom: sjenkin@canb.auug.org.au X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-tuhs.tuhs.org-0; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: TUHS X-Mailman-Version: 3.3.6b1 Precedence: list Subject: [TUHS] Re: origin of null-terminated strings List-Id: The Unix Heritage Society mailing list Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: > On 17 Dec 2022, at 09:26, Douglas McIlroy = wrote: >=20 >>=20 >> was any thought given to trying to get a 360 system? >=20 > Very serious thought. However, virtual memory was a non-negotiable > desideratum, to which Gene Amdahl was implacably opposed because > demand paging would devastate hardware performance. Soon after GE got > the nod, IBM revealed Gerrit Blaauw's skunk-works project, the 360/67, > but by then the die had been cast. Michigan bought one and built a > nice time-sharing system that was running well before Multics. >=20 > Doug Doug, Thanks for the insight. I've seen =E2=80=9CMTS=E2=80=9D mentioned, but never properly understood = its significance. Never looked into it, either :( Brief search results below, w/o Wikipedia etc. A process step of building new =E2=80=99things=E2=80=99, skipped on all = computing / I.T. projects I worked on, is a =E2=80=9CPost Mortem=E2=80=9D a.k.a =E2=80=9CPost Implementation = Review=E2=80=9D. If MIT / Bell Labs / GE ever did a project review on Multics, I=E2=80=99d = love to know if it=E2=80=99s been published, and what insights they came away with, and any changes made to their development & project management = processes. The MIT lead, Corbat=C3=B3 / Corby, had demonstrated a high-level of = competence & ability. He'd built CTSS in 1961 and won the ACM Turing Award in 1990. Never = given to "second best=E2=80=9D. It wasn=E2=80=99t a lack of talent, need, desire (for a product/service = to sell) or funding that made Multics take years & years. With the capability & experience of the people involved, it'd be = simplistic and superficial to attribute the project delays to =E2=80=9CSecond System Effect=E2=80=9D. Is it more akin to what we=E2=80=99re seeing now in the differences in = approach to building Space Launch Systems & Vehicles? I don=E2=80=99t have words/ concepts for the different approaches, but = they seem to parallel how Multics & Unix were developed. - NASA & Boeing et al have only just flown the Space Shuttle = replacement, Artemis, the SLS pluse Orion capsule. In 2005, a program to replace the Shuttle (retired in = 2011) was begun. This was replaced with the SLS / Artemis program in 2010 = - reusing many of the Shuttle components, eg RS-25 engines. Next flight, Artemis 2, due in 2024. - Space-X is developing it=E2=80=99s second launch system, plus = a Crew / Cargo vehicle (StarShip). Falcon 9 has become the cheapest per kg/LEO, most = reliable and most flown rocket in history. They=E2=80=99ve already beaten 1 launch/week this year, = lofting 150+ tons per quarter into LEO. Which is more than two-times all other programs, public = or private, put together. steve j =3D=3D=3D=3D=3D=3D=3D=3D David L. Mills, photo gallery & some comments Michigan Terminal System (MTS) = During much of the 1960s I was a staff member at the U = Michigan Computing Center. I worked with a bunch of other guys on various hardward = and software projects,=20 one of which is described on this page. =3D=3D=3D=3D=3D=3D=3D=3D Organization and features of the Michigan terminal system Michael T. Alexander 16 November 1971 ABSTRACT This paper will explore some aspects of the Michigan = Terminal System (MTS) developed at the University of Michigan.=20 MTS is the operating system used on the IBM 360/67 at = the University of Michigan Computing Center, as well as at several other installations. It supports a large variety of uses ranging from very = small student-type jobs to large jobs requiring several million bytes of = storage and hours of processor time.=20 Currently at the University of Michigan there are about = 13,000 users running as many as 86,000 jobs per month. =3D=3D=3D=3D=3D=3D=3D=3D Time-sharing in the IBM system/360: model 67 Charles T. Gibson IBM Fine detail of 360/67, differences to /50. TSS mentioned =3D=3D=3D=3D=3D=3D=3D=3D -- Steve Jenkin, IT Systems and Design=20 0412 786 915 (+61 412 786 915) PO Box 38, Kippax ACT 2615, AUSTRALIA mailto:sjenkin@canb.auug.org.au http://members.tip.net.au/~sjenkin