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=-0.8 required=5.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FROM,MAILING_LIST_MULTI autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 27193 invoked from network); 1 Dec 2021 06:29:50 -0000 Received: from minnie.tuhs.org (45.79.103.53) by inbox.vuxu.org with ESMTPUTF8; 1 Dec 2021 06:29:50 -0000 Received: by minnie.tuhs.org (Postfix, from userid 112) id 5F1A09CDA9; Wed, 1 Dec 2021 16:29:48 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 0E21E9C78B; Wed, 1 Dec 2021 16:29:20 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="a+8i6UEd"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id ED0DB9C78B; Wed, 1 Dec 2021 16:27:37 +1000 (AEST) Received: from mail-qk1-f169.google.com (mail-qk1-f169.google.com [209.85.222.169]) by minnie.tuhs.org (Postfix) with ESMTPS id 6308694502 for ; Wed, 1 Dec 2021 16:27:37 +1000 (AEST) Received: by mail-qk1-f169.google.com with SMTP id i9so29804511qki.3 for ; Tue, 30 Nov 2021 22:27:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:references:in-reply-to:subject:date:message-id:mime-version :content-transfer-encoding:thread-index:content-language; bh=VsD3DZrZCniT7xDimryT0kfoP2CANDuiGTTPsJxVDak=; b=a+8i6UEdDF8eRRHlrrzCglAjgaeqAunrkT1VCCSU9DwxmEzNzrELBMMGwaIqIHLp22 8el8ebQMbMqndFXS1yHbnDniboGLX1bB4MH2WR7feAECvwGJn9NCUmtOpxw+sTyS1OZ/ qt+VUPe3dXj0+97xcqRwalF0HUR4fZD9Lki9FrB99MxK5PJoUsQh+aECKzc571E26jGu Btot4eOkSREQMbSNMwR5ulm9itu8HRUN/1r2eDqEkgRiOt0WohmaWBfAKNcqnv7FOGTs njhnv8EeVnqRevNW4MprS9ZXmYGg9lONQl6Ho7QaIyFOuZi16k88lkCAcdbm7bkomitO +glQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:references:in-reply-to:subject:date :message-id:mime-version:content-transfer-encoding:thread-index :content-language; bh=VsD3DZrZCniT7xDimryT0kfoP2CANDuiGTTPsJxVDak=; b=RdIIU2aK9Rod7PrAzMz3PDCrZCLD6zNG01Qxxrfkh21Z8Q/3bw8nsfjnAyjpRhFpoZ 0+nlMU/rDljNLcP2ZHi7RZ0pWkI1bOmZhNyYQ2l346JSe2tYxBJeMg6TZBoOFRuqTbkU ujUHB28caFAcm9v+8Ds+X5I6aG9UWy3wVCX5dMRX8ENPnU9Iwq610LDkKqCLBObXWsEs 9mh/uL8OTDwrFkUzatz3tWiYnERxIacsx5ddZF8sVYPhq5swFiSMzUffglNJ6KBNNuWN IrASAVchGMP/ON9elT8U2Mojg8Cz9TvtsTYTtlilQUjxzwjNuz9dU11IUhmMMlLEc7pU d0gQ== X-Gm-Message-State: AOAM530lJ1IEUICsbBJ+IKuOZrlHJNwVwCgmpiZtokkBIuie35mjCN98 MEo5+7lZcntV6EXEE7WXaeCdFuCMKSs= X-Google-Smtp-Source: ABdhPJyy3lqwj6BbCtob8jylOZQm1tsCze/J32ZLiVhFE4UwU9VDzM2w1JpWPsxMfF89XCX/7e3sHg== X-Received: by 2002:a05:620a:370c:: with SMTP id de12mr4000082qkb.546.1638340056261; Tue, 30 Nov 2021 22:27:36 -0800 (PST) Received: from Primary (pool-96-241-37-234.washdc.fios.verizon.net. [96.241.37.234]) by smtp.gmail.com with ESMTPSA id bl16sm11023692qkb.44.2021.11.30.22.27.35 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 30 Nov 2021 22:27:35 -0800 (PST) From: To: "'TUHS main list'" References: <010901d7e5c1$4a0c7c20$de257460$@gmail.com> <202111301530.1AUFU2eC015214@freefriends.org> <202111301850.1AUIovEG006894@darkstar.fourwinds.com> <202111302307.1AUN7TBv066715@darkstar.fourwinds.com> <202112010500.1B150a48077541@darkstar.fourwinds.com> In-Reply-To: <202112010500.1B150a48077541@darkstar.fourwinds.com> Date: Wed, 1 Dec 2021 01:27:35 -0500 Message-ID: <028601d7e67c$87e1bbd0$97a53370$@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Outlook 16.0 Thread-Index: AQE3EX6DC7KzhBcIY+CT0sYGZOG3wAKgt522ApsCMogBmGdANAIlK2zBAThaPZUBO8YizgFiiyvWrPhUisA= Content-Language: en-us 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" Said Jon: " In a microcoded machine, the same hardware is used for every microinstruction. In random logic, custom designed circuitry is used for each special case." Best way to get a handle on the distinction is to read up on the originator of the concept, Maurice Wilkes: https://en.wikipedia.org/wiki/Maurice_Wilkes https://amturing.acm.org/info/wilkes_1001395.cfm The original paper: http://www.cs.princeton.edu/courses/archive/fall09/cos375/BestWay.pdf "The Best Way to Design an Automatic Calculating Machine" (1951) -----