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 b4bde2a1 for ; Thu, 21 Nov 2019 13:28:56 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id EC9FC9B4F4; Thu, 21 Nov 2019 23:28:54 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 670AE93DBE; Thu, 21 Nov 2019 23:28:43 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id 6738093DBE; Thu, 21 Nov 2019 23:28:41 +1000 (AEST) X-Greylist: delayed 1297 seconds by postgrey-1.36 at minnie.tuhs.org; Thu, 21 Nov 2019 23:28:40 AEST Received: from anduin.eldar.org (anduin.eldar.org [24.106.248.90]) by minnie.tuhs.org (Postfix) with ESMTPS id CB1ED93D9E for ; Thu, 21 Nov 2019 23:28:40 +1000 (AEST) Received: from anduin.eldar.org (IDENT:brad@localhost [127.0.0.1]) by anduin.eldar.org (8.15.2/8.13.8) with ESMTPS id xALD700U007334 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Thu, 21 Nov 2019 08:07:00 -0500 (EST) Received: (from brad@localhost) by anduin.eldar.org (8.15.2/8.13.8/Submit) id xALD704L024408; Thu, 21 Nov 2019 08:07:00 -0500 (EST) From: Brad Spencer To: Dan Cross In-Reply-To: (message from Dan Cross on Thu, 21 Nov 2019 06:58:38 -0500) Date: Thu, 21 Nov 2019 08:07:00 -0500 Message-ID: MIME-Version: 1.0 Content-Type: text/plain X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.4.3 (anduin.eldar.org [127.0.0.1]); Thu, 21 Nov 2019 08:07:00 -0500 (EST) 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: , Cc: tuhs@minnie.tuhs.org Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" Dan Cross writes: > On Thu, Nov 21, 2019, 1:33 AM Al Kossow wrote: > >> >> >> On 11/5/19 11:59 PM, SPC wrote: >> > >> > >> > Is it AOS stuff saved and available (including source code) >> > un some place on the Internet? >> >> 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. > > - Dan C. For a brief time a long time ago, I used a 4.3BSD based Mt. Xinu, MACH microkernel, OS on the IBM-RT as an alternative to AOS. Ran well enough, but was disk and memory constrained. We had source to much of the system (or perhaps all of it, don't remember), but I seem to recall that compiling it was a big pain. Something like you had to use a specific compiler (perhaps referred to as High C?? hc command perhaps) to compile some of the source. gcc had a backend for the ROMP processor, but it had a hard time making usable binaries. I think that some variation of pcc was the usual compiler. I remember it being pretty stock 4.3BSD with NFS and minus YP/NIS. We used them mostly as X terminal workstations. -- Brad Spencer - brad@anduin.eldar.org - KC8VKS - http://anduin.eldar.org