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=-1.1 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 12258 invoked from network); 2 May 2023 01:16:07 -0000 Received: from minnie.tuhs.org (2600:3c01:e000:146::1) by inbox.vuxu.org with ESMTPUTF8; 2 May 2023 01:16:07 -0000 Received: from minnie.tuhs.org (localhost [IPv6:::1]) by minnie.tuhs.org (Postfix) with ESMTP id 9732B4142C; Tue, 2 May 2023 11:16:00 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tuhs.org; s=dkim; t=1682990160; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:list-id:list-help: list-owner:list-unsubscribe:list-subscribe:list-post; bh=qqCbqPbmRacDqd4B0XxMTVwamNISKnVCfDsLYYy/sow=; b=NW7H+VEIyxBpJUabTvSpg/+Jnbh34vv3fA1rgwFh0/Cxf3VBYaSL81e0dCrIKoFAcyu0Fw JJtGroM0fJTvn+Bv0dzmD1BDu99SckguGip/nmiCUiJ0E5eIxwZj6XuGAYerQRocSUAjY6 gcT515ZzEuR0Zjt826uIMtUnzDeRzjI= Received: from qs51p00im-qukt01072302.me.com (qs51p00im-qukt01072302.me.com [17.57.155.13]) by minnie.tuhs.org (Postfix) with ESMTPS id 06F8541208 for ; Tue, 2 May 2023 11:15:52 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mac.com; s=1a1hai; t=1682990151; bh=qqCbqPbmRacDqd4B0XxMTVwamNISKnVCfDsLYYy/sow=; h=Content-Type:Mime-Version:Subject:From:Date:Message-Id:To; b=UPnd93KWpuFGKAgBpGBYAsPyR+Z6Xhm2FAdrBOV3u3+QDz7VBIH+ly0GwbQ5LM6oC 3jnNe9rXSV18vkuPkjvl/YK4Z5XyJgZ8O8wHKg9SEEaQGiVqhbnsZc/QMiEtMyNRal S/8+s06VwVjZEUeezftd7x4C52WFslsqwyKMzqNH2otLlYlAwHn5ySj/K8huVUOk1t WM5472Q8S/3DeHrBB1FDzAbXRyf5cGRQtY2EO2k3auRD+XGwzdlRPJ8hrk/JOhL7eP ctNr989WNRVB0QjEVgJz6hsWFGr9lf6QKg/y7Mx8fYE3jVOfUubtwk8heSTUmfoNIP wqnGwTvgff3BA== Received: from smtpclient.apple (qs51p00im-dlb-asmtp-mailmevip.me.com [17.57.155.28]) by qs51p00im-qukt01072302.me.com (Postfix) with ESMTPSA id A5A776300346; Tue, 2 May 2023 01:15:50 +0000 (UTC) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (1.0) In-Reply-To: Date: Mon, 1 May 2023 21:15:48 -0400 Message-Id: <2B6C7969-FF99-4693-A3E8-22813E6ECF41@mac.com> References: To: Steve Simon X-Mailer: iPad Mail (20E252) X-Proofpoint-GUID: I6-bFkKWX7xfnAkJxK5XgXOKrn9fL6JD X-Proofpoint-ORIG-GUID: I6-bFkKWX7xfnAkJxK5XgXOKrn9fL6JD X-Proofpoint-Virus-Version: =?UTF-8?Q?vendor=3Dfsecure_engine=3D1.1.170-22c6f66c430a71ce266a39bfe25bc?= =?UTF-8?Q?2903e8d5c8f:6.0.425,18.0.572,17.11.62.513.0000000_definitions?= =?UTF-8?Q?=3D2022-01-11=5F01:2022-01-11=5F01,2020-02-14=5F11,2021-12-02?= =?UTF-8?Q?=5F01_signatures=3D0?= X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 clxscore=1011 bulkscore=0 mlxscore=0 mlxlogscore=490 suspectscore=0 malwarescore=0 spamscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2305020008 Message-ID-Hash: 2GTH47SJYXE3CRAO5TKGD7UVKDIHH3S4 X-Message-ID-Hash: 2GTH47SJYXE3CRAO5TKGD7UVKDIHH3S4 X-MailFrom: norwayjose@mac.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: UNIX "Machine Layer" List-Id: The Unix Heritage Society mailing list Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: Roderick Bartlett via TUHS Reply-To: Roderick Bartlett X-Spam: Yes I believe the async lines were connected to I/O boards in the Front End Proc= essor, AKA the Datanet 66xx. I don't recall having to change baud rates tha= t way but we did have to do periodic FCOs (field change orders) which requir= ed wiring changes and occasional chip changes to correct bugs. I've still g= ot my hand wire wrap tool somewhere but it hasn't been used in at least 30 y= ears. - Rod > On May 1, 2023, at 2:12 PM, Steve Simon wrote: >=20 > =EF=BB=BF > =E2=80=9Csoldering iron=E2=80=A6=E2=80=9D >=20 > i do remember the fun of changing the baud rate of an async line on the Ho= neywell level 66 mainframe at college. This required shutting the whole mach= ine down, removing one of the cards, and the (very careful) use of a wire wr= ap tool. >=20 > -Steve >=20