From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: tuhs-bounces@minnie.tuhs.org X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.1 Received: from minnie.tuhs.org (minnie.tuhs.org [45.79.103.53]) by inbox.vuxu.org (OpenSMTPD) with ESMTP id 3658f8d2 for ; Tue, 19 Jun 2018 12:24:19 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id C3308A19E2; Tue, 19 Jun 2018 22:24:18 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id EA47CA19D5; Tue, 19 Jun 2018 22:24:04 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id 49670A19D5; Tue, 19 Jun 2018 22:24:01 +1000 (AEST) Received: from mercury.lcs.mit.edu (mercury.lcs.mit.edu [18.26.0.122]) by minnie.tuhs.org (Postfix) with ESMTPS id ECEA4A19D4 for ; Tue, 19 Jun 2018 22:23:59 +1000 (AEST) Received: by mercury.lcs.mit.edu (Postfix, from userid 11178) id 1525D18C084; Tue, 19 Jun 2018 08:23:59 -0400 (EDT) To: tuhs@tuhs.org Message-Id: <20180619122359.1525D18C084@mercury.lcs.mit.edu> Date: Tue, 19 Jun 2018 08:23:59 -0400 (EDT) From: jnc@mercury.lcs.mit.edu (Noel Chiappa) Subject: Re: [TUHS] core X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jnc@mercury.lcs.mit.edu Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" > From: Doug McIlroy > Core memory wiped out competing technologies (Williams tube, mercury > delay line, etc) almost instantly and ruled for over twent years. I never lived through that era, but reading about it, I'm not sure people now can really fathom just how big a step forward core was - how expensive, bulky, flaky, low-capacity, etc, etc prior main memory technologies were. In other words, there's a reason they were all dropped like hot potatoes in favour of core - which, looked at from our DRAM-era perspective, seems quaintly dinosaurian. Individual pieces of hardware you can actually _see_ with the naked eye, for _each_ bit? But that should give some idea of how much worse everything before it was, that it killed them all off so quickly! There's simply no question that without core, computers would not have advanced (in use, societal importance, technical depth, etc) at the speed they did without core. It was one of the most consequential steps in the development of computers to what they are today: up there with transistors, ICs, DRAM and microprocessors. > Yet late in his life Forrester told me that the Whirlwind-connected > invention he was most proud of was marginal testing Given the above, I'm totally gobsmacked to hear that. Margin testing was important, yes, but not even remotely on the same quantum level as core. In trying to understand why he said that, I can only suppose that he felt that core was 'the work of many hands', which it was (see e.g. "Memories That Shaped an Industry", pg. 212, and the things referred to there), and so he only deserved a share of the credit for it. Is there any other explanation? Did he go into any depth as to _why_ he felt that way? Noel