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 24886 invoked from network); 19 Sep 2023 15:34:12 -0000 Received: from minnie.tuhs.org (2600:3c01:e000:146::1) by inbox.vuxu.org with ESMTPUTF8; 19 Sep 2023 15:34:12 -0000 Received: from minnie.tuhs.org (localhost [IPv6:::1]) by minnie.tuhs.org (Postfix) with ESMTP id 6909440920; Wed, 20 Sep 2023 01:34:05 +1000 (AEST) Received: from mail-pj1-x102d.google.com (mail-pj1-x102d.google.com [IPv6:2607:f8b0:4864:20::102d]) by minnie.tuhs.org (Postfix) with ESMTPS id E2B52408F8 for ; Wed, 20 Sep 2023 01:34:01 +1000 (AEST) Received: by mail-pj1-x102d.google.com with SMTP id 98e67ed59e1d1-2768239d2f3so1427948a91.1 for ; Tue, 19 Sep 2023 08:34:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1695137641; x=1695742441; darn=tuhs.org; h=cc:to:subject:message-id:date:from:references:in-reply-to :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=R4pn4YzMSYRE6M3JPMt/FyXYvNFUQOxALK+uG9hSgg8=; b=JQ72oTKAM9xByZ2F9VndLm6Ifm3Qg1OjE1Cp+Bh0vss6PebwxExxP5JMIkAej17vRY YZod6hjVG5IiNi9H3qJ1RRcFK3DlOmsx+yaaACaBAxT6ux1ERIdS5zhDEhrw66AWauvy 9NIdsgt9ApH6s9YkJwb399GxQYZigFEG+ARoUzxAJZKstPVmQHaHosJH8o19orwYRMyt xaOPdhUyBbXl7Hq5SX+Pt0e7ELFS4xVfil92K1K0sI3OLj+ZuUecfZjXt8EERFefkYqj i7uTlNUB+UzHUpG+VGiSotSGjysqXJ11vQJF8icvWjr1tgeMqUIN8il/Ldl+nPDnQ/1D /9Lg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1695137641; x=1695742441; h=cc:to:subject:message-id:date:from:references:in-reply-to :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=R4pn4YzMSYRE6M3JPMt/FyXYvNFUQOxALK+uG9hSgg8=; b=frNwF7dp3RpaCR5Sfu4HohZ14Ci1pRRq1u4lR8Kpq7oX6RY172gT9OhhC8BVIt5pAn +d9SHL/GEoo2RBIHHVXCCcR3gjkmPKijjO0O5d7X/IYZg6GCf+Bkcp5UZKzMwkbon7Un WU4LPNHZKdyCr2Tk8W05JPZ2Vvy1H/wW4y5Hl96KQuTx0OtbpBQrpimpdWjRYK6CmV0I o+Me2iNO4xIFZkp1HK80YYbyzYRRFyoPJ2m0lvSdgfgRSoEbd3LezXNEpu6Z7v0YJgrE 4iOiBFzHyHv0Uw6eZ1mRP8XZxHeRZuyAfr2bw8tdYAm6R7jolEHW0Wf+8n8Y0ui8FJdJ 9uxA== X-Gm-Message-State: AOJu0YwRndM39lkQ/dlC+VbFQ3AdfMU3jFlirzghxaf65pKpDnZfa/Js /HD/CAO+kmhl84FRwQk/nmhdD/0IlQhB8SuowRQ= X-Google-Smtp-Source: AGHT+IHMpWQg+fVoRCNKZm75rwU8QhHzkpc00u3JyPcSMIFbhEr0ZNCjcKRlXeEi7SEg9FSn/MLjsKvC47FwwGQbsdE= X-Received: by 2002:a17:90b:1e0a:b0:269:85d:2aef with SMTP id pg10-20020a17090b1e0a00b00269085d2aefmr72993pjb.20.1695137641017; Tue, 19 Sep 2023 08:34:01 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:a05:6a10:cca6:b0:4e6:21ca:4dee with HTTP; Tue, 19 Sep 2023 08:34:00 -0700 (PDT) In-Reply-To: <87246EC9-0AC8-404E-A8DD-508AB046018B@planet.nl> References: <87246EC9-0AC8-404E-A8DD-508AB046018B@planet.nl> From: Paul Winalski Date: Tue, 19 Sep 2023 11:34:00 -0400 Message-ID: To: Paul Ruizendaal Content-Type: text/plain; charset="UTF-8" Message-ID-Hash: MH6FA6YQHDQT6YIUMOQTID7WVFF55OGJ X-Message-ID-Hash: MH6FA6YQHDQT6YIUMOQTID7WVFF55OGJ X-MailFrom: paul.winalski@gmail.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: "tuhs@tuhs.org" X-Mailman-Version: 3.3.6b1 Precedence: list Subject: [TUHS] Re: CRC calculation in the 1980s List-Id: The Unix Heritage Society mailing list Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: For what it's worth, the VAX had a table-driven CRC instruction. It wasn't very popular because on most VAX models it was actually slower than by-hand coding. It is one of the instructions dropped from the microVAX instruction set used on all later VAXen, where it was emulated by the operating system. -Paul W.