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 e7878e49 for ; Mon, 18 Jun 2018 05:59:33 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id 71937A19E2; Mon, 18 Jun 2018 15:59:32 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 090DFA19D3; Mon, 18 Jun 2018 15:59:04 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id 51683A19D3; Mon, 18 Jun 2018 15:59:01 +1000 (AEST) Received: from Psilocybe.Update.UU.SE (Psilocybe.Update.UU.SE [130.238.19.25]) by minnie.tuhs.org (Postfix) with ESMTP id 3FF819EC27 for ; Mon, 18 Jun 2018 15:59:00 +1000 (AEST) Received: from localhost (localhost [127.0.0.1]) by Psilocybe.Update.UU.SE (Postfix) with ESMTP id 0815C80310 for ; Mon, 18 Jun 2018 07:58:59 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at Update.UU.SE Received: from Psilocybe.Update.UU.SE ([127.0.0.1]) by localhost (Psilocybe.Update.UU.SE [127.0.0.1]) (amavisd-new, port 10040) with ESMTP id docrc7RTg2ov for ; Mon, 18 Jun 2018 07:58:57 +0200 (CEST) Received: from Trollet.local (178-82-175-247.dynamic.hispeed.ch [178.82.175.247]) by Psilocybe.Update.UU.SE (Postfix) with ESMTPSA for ; Mon, 18 Jun 2018 07:58:57 +0200 (CEST) To: tuhs@minnie.tuhs.org References: From: Johnny Billquist Message-ID: Date: Mon, 18 Jun 2018 07:58:56 +0200 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit 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: , Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" On 2018-06-18 04:00, Ronald Natalie wrote: >> Well, it is an easy observable fact that before the PDP-11/70, all PDP-11 models had their memory on the Unibus. So it was not only "an ability at the lower end", b > That’s not quite true. While the 18 bit addressed machines all had their memory directly accessible from the Unibus, the 45/50/55 had a separate bus for the (then new) semiconductor (bipolar or MOS) memory. Eh... Yes... But... The "separate" bus for the semiconductor memory is just a second Unibus, so the statement is still true. All (earlier) PDP-11 models had their memory on the Unibus. Including the 11/45,50,55. It's just that those models have two Unibuses. Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt@softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol