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 18887 invoked from network); 19 Sep 2023 12:55:15 -0000 Received: from minnie.tuhs.org (2600:3c01:e000:146::1) by inbox.vuxu.org with ESMTPUTF8; 19 Sep 2023 12:55:15 -0000 Received: from minnie.tuhs.org (localhost [IPv6:::1]) by minnie.tuhs.org (Postfix) with ESMTP id B798F406D8; Tue, 19 Sep 2023 22:55:09 +1000 (AEST) Received: from junk.nocrew.org (junk.nocrew.org [51.15.56.219]) by minnie.tuhs.org (Postfix) with ESMTPS id 8AC3540687 for ; Tue, 19 Sep 2023 22:55:01 +1000 (AEST) Received: from localhost ([127.0.0.1] helo=junk.nocrew.org) by junk.nocrew.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2) (envelope-from ) id 1qiaFm-00007L-Uu; Tue, 19 Sep 2023 12:54:59 +0000 From: Lars Brinkhoff To: jnc@mercury.lcs.mit.edu (Noel Chiappa) Organization: nocrew References: <20230919114229.55D3418C084@mercury.lcs.mit.edu> Date: Tue, 19 Sep 2023 12:54:58 +0000 In-Reply-To: <20230919114229.55D3418C084@mercury.lcs.mit.edu> (Noel Chiappa's message of "Tue, 19 Sep 2023 07:42:29 -0400 (EDT)") Message-ID: <7w4jjqmifx.fsf@junk.nocrew.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-SA-Exim-Connect-IP: 127.0.0.1 X-SA-Exim-Mail-From: lars@nocrew.org X-SA-Exim-Scanned: No (on junk.nocrew.org); SAEximRunCond expanded to false Message-ID-Hash: FFWA7GZQQWUEVURHOMZHT3YWYHDN737S X-Message-ID-Hash: FFWA7GZQQWUEVURHOMZHT3YWYHDN737S X-MailFrom: lars@nocrew.org 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: Noel Chiappa writes: > I can't answer that directly, but I will point you at IEN-56, "CRC > Checksum Calculation", by Dave Reed (11-Sep-78): > > https://www.rfc-editor.org/ien/ien56.pdf I can't help but notice the first program is PDP-10 code for running on ITS. ObTUHS: the other is a PDP-11 asssembly language program for Unix. Machine readable versions for both can be procured.