From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) 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=3.4.2 Received: from minnie.tuhs.org (minnie.tuhs.org [45.79.103.53]) by inbox.vuxu.org (OpenSMTPD) with ESMTP id 1d3118cf for ; Thu, 21 Nov 2019 17:30:27 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id D6B9E94BCA; Fri, 22 Nov 2019 03:30:25 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id B417D93DBE; Fri, 22 Nov 2019 03:29:57 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id AE39093DBE; Fri, 22 Nov 2019 03:29:54 +1000 (AEST) Received: from rooster.satexas.com (rooster.satexas.com [207.235.90.2]) by minnie.tuhs.org (Postfix) with ESMTPS id 24BC393D9E for ; Fri, 22 Nov 2019 03:29:54 +1000 (AEST) Received: from localhost (localhost [127.0.0.1]) by rooster.satexas.com (Postfix) with ESMTP id 4E2511C2A82 for ; Thu, 21 Nov 2019 11:29:53 -0600 (CST) Received: from rooster.satexas.com ([127.0.0.1]) by localhost (rooster.satexas.com [127.0.0.1]) (maiad, port 10024) with ESMTP id 01875-05 for ; Thu, 21 Nov 2019 11:29:52 -0600 (CST) Received: from [192.168.147.6] (rrcs-71-42-153-195.sw.biz.rr.com [71.42.153.195]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: csauer@nwhillsumc.org) by rooster.satexas.com (Postfix) with ESMTPSA id 87CCF1C2AC5 for ; Thu, 21 Nov 2019 11:29:52 -0600 (CST) To: tuhs@minnie.tuhs.org References: <86352c85-1b06-6035-de4a-5b5a64f1cf98@technologists.com> <20191106000600.GD26959@mit.edu> <479EA77E-E0A7-4B27-AEBB-42948309C03E@technologists.com> <03867014-5806-aa15-f4e4-db5fe1c376a5@bitsavers.org> From: Charles H Sauer Message-ID: <3dd01785-c43a-7972-34e0-80049f0ec86d@technologists.com> Date: Thu, 21 Nov 2019 11:29:51 -0600 User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:60.0) Gecko/20100101 Thunderbird/60.9.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Virus-Scanned: World Net ProMail v2.0.0 Subject: Re: [TUHS] AOS and IBM/RT [Re: Amdahl UTS, AIX/370, AIX/ESA X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" On 11/21/2019 5:58 AM, Dan Cross wrote: > On Thu, Nov 21, 2019, 1:33 AM Al Kossow > wrote: > It was, and may still be in the afs heirarchy > I'm not going to say where, or how complete what was there is > I also seem to remember it still sat on top of an AIX microkernel > and didn't go down to bare metal. > > > No, that's not true. AOS was basically 4.3BSD Tahoe plus NFS and it ran > on bare RT hardware. There was source code available to universities, > though as I recall some bits related to memory management were missing > and distributed as object files. I gathered, at the time, this was due > to some obscure intellectual property reasons. People later tried to > Port e.g. 4.4BSD to aging RT hardware and found it challenging because > the memory subsystem was so different. > > But anyway, there was no hypervisor involved. There may well have been AFS for AIX and thus the confusion about hypervisor (AIX VRM). -- voice: +1.512.784.7526 e-mail: sauer@technologists.com fax: +1.512.346.5240 Web: https://technologists.com/sauer/ Facebook/Google/Skype/Twitter: CharlesHSauer