From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=MAILING_LIST_MULTI autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 19989 invoked from network); 30 Nov 2021 15:43:05 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 30 Nov 2021 15:43:05 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id 143629CF1F; Wed, 1 Dec 2021 01:43:03 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 1579D93D60; Wed, 1 Dec 2021 01:40:00 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id 7EE6E93D60; Wed, 1 Dec 2021 01:39:57 +1000 (AEST) Received: from relay05.pair.com (relay05.pair.com [216.92.24.67]) by minnie.tuhs.org (Postfix) with ESMTPS id 54F9E93D29 for ; Wed, 1 Dec 2021 01:39:56 +1000 (AEST) Received: from orac.inputplus.co.uk (unknown [87.112.72.13]) by relay05.pair.com (Postfix) with ESMTP id 266201A34A8 for ; Tue, 30 Nov 2021 10:39:55 -0500 (EST) Received: from orac.inputplus.co.uk (orac.inputplus.co.uk [IPv6:::1]) by orac.inputplus.co.uk (Postfix) with ESMTP id 2AABB210F4 for ; Tue, 30 Nov 2021 15:39:54 +0000 (GMT) To: tuhs@minnie.tuhs.org From: Ralph Corderoy MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit In-reply-to: <202111301530.1AUFU2eC015214@freefriends.org> References: <010901d7e5c1$4a0c7c20$de257460$@gmail.com> <202111301530.1AUFU2eC015214@freefriends.org> Date: Tue, 30 Nov 2021 15:39:54 +0000 Message-Id: <20211130153954.2AABB210F4@orac.inputplus.co.uk> Subject: Re: [TUHS] Encoding an ISA: Random Logic vs. Control Stores 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" Hi Arnold, > Can someone please explain why it's called "random" logic? Discrete > logic I understand (more or less), but I've not heard the term > "random" used in this context before now. I'm more used to ‘hard-wired’ logic versus ‘micro-programmed’ for microcode but random logic in a known term in this context: https://en.wikipedia.org/wiki/Random_logic Random logic is a semiconductor circuit design technique that translates high-level logic descriptions directly into hardware features such as AND and OR gates. The name derives from the fact that few easily discernible patterns are evident in the arrangement of features on the chip and in the interconnects between them. -- Cheers, Ralph.