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_INVALID,DKIM_SIGNED, HTML_MESSAGE,MAILING_LIST_MULTI autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 25080 invoked from network); 10 Feb 2023 13:21:22 -0000 Received: from minnie.tuhs.org (50.116.15.146) by inbox.vuxu.org with ESMTPUTF8; 10 Feb 2023 13:21:22 -0000 Received: from minnie.tuhs.org (localhost [IPv6:::1]) by minnie.tuhs.org (Postfix) with ESMTP id 6FC7641BD8; Fri, 10 Feb 2023 23:21:18 +1000 (AEST) Received: from mail-vs1-xe30.google.com (mail-vs1-xe30.google.com [IPv6:2607:f8b0:4864:20::e30]) by minnie.tuhs.org (Postfix) with ESMTPS id 60D2941BD7 for ; Fri, 10 Feb 2023 23:21:09 +1000 (AEST) Received: by mail-vs1-xe30.google.com with SMTP id g8so5622512vso.3 for ; Fri, 10 Feb 2023 05:21:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ccc.com; s=google; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=DtJ0TiSagHl1h6FITFfb+OeeUIZ65GCm97L+rzKv79U=; b=hHTEyA76z0bFCk1m7GnI9Ls56xbmZ6zFXLY6AP0YUbTOFRfv78316VpeHtEgb5BbQ5 04+X/cjig41ij2RvJKrP02laOtCUnGPfuWD/enf0FvbEG/FDqwIveUjH81knvftFhVR8 1LNx0On+yehXBnDAUDfFGpGcELl4dqDtVNg7c= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=DtJ0TiSagHl1h6FITFfb+OeeUIZ65GCm97L+rzKv79U=; b=hHHN7UTPpZPucv3hOnNJwKQYzOBOQUbo5DQcnmAsn86SNMfqjcK3Wkhpnmkkjf8A/7 MeWK580YbS0lZXpSHbjNBMNHaC+3xcDa71bMhy6shZVcfSxt0eb9/jpIDdvTOYyioD04 xKNFPEwdisunh/ES6XJu5OhDbjZ+lUvF5SHgmMcfgLrmgKCecb19utWuj/U2oAp8ISiE /M17SMUVsmoj3zUfNFoDrhBqPCBci+UnESeKS81YeO7WdGFSHVIP4sOEp2qoXcZbuq56 Vq20bWBxiA7XWCgzhlPpMFRa9ZaIJSpojNG7YzwMRjl9oYvOeOs+gCmgqPBh/0OqvYF4 xZ7Q== X-Gm-Message-State: AO0yUKVsit6B+uigJ7weoTmZJOcYLbdftgAAOxjhHAYQK0CI040s6Msw 1PRDRuO4ZFpUjojtkqXOK3VkHE7cl7uMcIK78A37I8WSywtcL/zN X-Google-Smtp-Source: AK7set8TdwOuXoUXV1+R+mesGyQC16HrSSaUSXFLayq8iAhOd5kqK61jOiJFr2hwUCdi6P1QylxaLIC64mKUpTVMSQ4= X-Received: by 2002:a67:e206:0:b0:3f1:cdec:49da with SMTP id g6-20020a67e206000000b003f1cdec49damr2553892vsa.52.1676035267556; Fri, 10 Feb 2023 05:21:07 -0800 (PST) MIME-Version: 1.0 References: <854dfba0-6cf2-57a4-3995-c57571205d1f@googlemail.com> In-Reply-To: From: Clem Cole Date: Fri, 10 Feb 2023 08:20:56 -0500 Message-ID: To: Douglas McIlroy Content-Type: multipart/alternative; boundary="000000000000c10ec505f4585ef1" Message-ID-Hash: MFDNK3H5N3MD3UMTSQ2AQ7FWLRB33GON X-Message-ID-Hash: MFDNK3H5N3MD3UMTSQ2AQ7FWLRB33GON X-MailFrom: clemc@ccc.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-tuhs.tuhs.org-0; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: Christian Dreier , tuhs@tuhs.org X-Mailman-Version: 3.3.6b1 Precedence: list Subject: [TUHS] Re: Circuit design tool mentioned in AT&T Unix promotion List-Id: The Unix Heritage Society mailing list Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: --000000000000c10ec505f4585ef1 Content-Type: text/plain; charset="UTF-8" FYI: The sources to CDL are in the TUHS archives. On Fri, Feb 10, 2023 at 7:56 AM Douglas McIlroy < douglas.mcilroy@dartmouth.edu> wrote: > CDL was for designing wired circuit boards, not integrated circuits.. > It was used to design the Datakit switch, the Belle chess machine and > other hardware. > > I suspect the cited IC-design tool was one that Steve Johnson created > for use in a short course that Carver Mead taught at Bell Labs. I am > not aware that it saw use outside of that course. > > Doug > > On Fri, Feb 10, 2023 at 12:37 AM Christian Dreier via TUHS > wrote: > > > > Hello there, > > > > I recently watched an old Unix promotion video by AT&T on YouTube (AT&T > > Archives: The UNIX Operating System: https://youtu.be/tc4ROCJYbm0) and > > they mention a design tool for integrated circuits (apparently named > > L-Gen or lgen; timestamped link: https://youtu.be/tc4ROCJYbm0?t=1284). > > > > Part of this software is a language implemented with YACC that appears > > to describe the behavior of digital logic, like modern hardware > > description languages, i.e. Verilog and VHDL. > > > > Does anyone have information about this, in particular: > > - Documentation > > - Which projects were realized with this? > > - Source code, if possible > > > > I asked this question on retrocomputing.stackexchange.com (see > > https://retrocomputing.stackexchange.com/q/26301/26615) but so far there > > is no satisfying answer. A "Circuit Design Language" (CDL) is mentioned > > and there is some good information about it but it has another syntax > > (as shown in the video vs. the documentation about CDL) and apparently > > another purpose (description of board wiring vs. logic behavior). > > > > Best regards, > > Christian > -- Sent from a handheld expect more typos than usual --000000000000c10ec505f4585ef1 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
FYI: The sources to CDL are in the TUHS archives. =C2=A0= =C2=A0

On Fri, Feb 10, 2023 at 7:56 AM Douglas McIlroy <douglas.mcilroy@dartmouth.edu> = wrote:
CDL was for designing wired = circuit boards, not integrated circuits..
It was used to design the Datakit switch, the Belle chess machine and
other hardware.

I suspect the cited IC-design tool was one that Steve Johnson created
for use in a short course that Carver Mead taught at Bell Labs. I am
not aware that it saw use outside of that course.

Doug

On Fri, Feb 10, 2023 at 12:37 AM Christian Dreier via TUHS
<tuhs@tuhs.org>= ; wrote:
>
> Hello there,
>
> I recently watched an old Unix promotion video by AT&T on YouTube = (AT&T
> Archives: The UNIX Operating System: https://youtu.be/tc4ROCJYbm0) and
> they mention a design tool for integrated circuits (apparently named > L-Gen or lgen; timestamped link: https://youtu.be/tc4ROCJY= bm0?t=3D1284).
>
> Part of this software is a language implemented with YACC that appears=
> to describe the behavior of digital logic, like modern hardware
> description languages, i.e. Verilog and VHDL.
>
> Does anyone have information about this, in particular:
> - Documentation
> - Which projects were realized with this?
> - Source code, if possible
>
> I asked this question on retrocomputing.stackexchange.co= m (see
> https://retrocomputing.stackexchange.com/= q/26301/26615) but so far there
> is no satisfying answer. A "Circuit Design Language" (CDL) i= s mentioned
> and there is some good information about it but it has another syntax<= br> > (as shown in the video vs. the documentation about CDL) and apparently=
> another purpose (description of board wiring vs. logic behavior).
>
> Best regards,
> Christian
--
Sent from a handheld expect more typos t= han usual
--000000000000c10ec505f4585ef1--