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=-1.0 required=5.0 tests=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 6b170506 for ; Thu, 2 Aug 2018 13:17:31 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id 9F68CA1DC7; Thu, 2 Aug 2018 23:17:30 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id EB9A8A1D3C; Thu, 2 Aug 2018 23:17:14 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id 26CA9A1D3C; Thu, 2 Aug 2018 23:17:12 +1000 (AEST) X-Greylist: delayed 370 seconds by postgrey-1.35 at minnie.tuhs.org; Thu, 02 Aug 2018 23:17:11 AEST Received: from post.cogs.com (post.cogs.com [72.43.6.86]) by minnie.tuhs.org (Postfix) with ESMTPS id A6991A1D3B for ; Thu, 2 Aug 2018 23:17:11 +1000 (AEST) Received: from localhost (localhost [127.0.0.1]) by post.cogs.com (Postfix) with ESMTP id BB2381015870CA for ; Thu, 2 Aug 2018 09:11:00 -0400 (EDT) X-Virus-Scanned: amavisd-new at cogs.com Received: from post.cogs.com ([127.0.0.1]) by localhost (post.cogs.com [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id p70U0oYN77kQ for ; Thu, 2 Aug 2018 09:10:57 -0400 (EDT) Received: from [192.168.0.189] (unknown [172.56.22.250]) by post.cogs.com (Postfix) with ESMTPSA id CE9291015870C3 for ; Thu, 2 Aug 2018 09:10:56 -0400 (EDT) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 12.0 \(3445.100.9.7\)) Date: Thu, 2 Aug 2018 09:10:54 -0400 References: <201808021244.w72CiuU4025022@tahoe.cs.Dartmouth.EDU> To: TUHS main list In-Reply-To: <201808021244.w72CiuU4025022@tahoe.cs.Dartmouth.EDU> Message-Id: X-Mailer: Apple Mail (2.3445.100.9.7) Subject: Re: [TUHS] In Memoriam: Per Brinch Hansen 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: , From: Ben Greenfield via TUHS Reply-To: Ben Greenfield Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" Is this a weblink to that manual? I want to read something so well written:) Ben = https://pdfs.semanticscholar.org/b77f/02dedb784a52229c5376277173c5ef6da5c1= .pdf > On Aug 2, 2018, at 8:44 AM, Doug McIlroy = wrote: >=20 > A tangential connection to early Unix experience: >=20 > My collection of early computer manuals includes Brinch Hansen's = manual > for the RC 4000, which stands out for its precise description of the > CPU logic--in Algol 60! It's the only manual I have seen that offers a > good-to-the-last-bit formal description of the hardware. >=20 > DEC presented something of the sort for the PDP-11, but punted where > the woods got thick. When I wanted to know how they computed the last > bit of floating-point results, I got no satisfaction. Amidst a = thorough > description of addressing came this formulation of the actual = computation: > "form floating point result". >=20 > Doug