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_FONT_LOW_CONTRAST,HTML_MESSAGE,MAILING_LIST_MULTI autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 11221 invoked from network); 10 Feb 2023 15:04:23 -0000 Received: from minnie.tuhs.org (2600:3c01:e000:146::1) by inbox.vuxu.org with ESMTPUTF8; 10 Feb 2023 15:04:23 -0000 Received: from minnie.tuhs.org (localhost [IPv6:::1]) by minnie.tuhs.org (Postfix) with ESMTP id 6783741B87; Sat, 11 Feb 2023 01:04:17 +1000 (AEST) Received: from mail-vs1-xe2a.google.com (mail-vs1-xe2a.google.com [IPv6:2607:f8b0:4864:20::e2a]) by minnie.tuhs.org (Postfix) with ESMTPS id 3735040D8A for ; Sat, 11 Feb 2023 01:04:07 +1000 (AEST) Received: by mail-vs1-xe2a.google.com with SMTP id g8so5941917vso.3 for ; Fri, 10 Feb 2023 07:04:07 -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=4XiYru9bfq7MK/fF1DHeIApt3xjsKs01UV6h5BG2a+g=; b=dAPgPMtD/2rnJ1pzzI3NchmpzJoNrTVX1N9L196DmqGOTJzuH8H02icsI6XV9f1WW7 WoM+Ri6rkuZRLkb+e/eyffoELGrb3Kj0DQMGFL6R5GCNakmF5IWf1yFJRPobG3xgKMnt HY05hNXWIOrO5cMAdHQqIldmJ3joxiJs6OPyM= 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=4XiYru9bfq7MK/fF1DHeIApt3xjsKs01UV6h5BG2a+g=; b=HSef0l0LuuTU8DZclVY+skPSDuOXrffhF2bMuoa4S3njK9yL8QUCxzRt79HssueGn5 0FR2ujI/akaFOV8twlWertd2VvsYm8X7Od3Bl4PxWulOoc949rzNhwJdwkJ0nEfMkA5q 6A9FWPUu5GIJ29YvjL9s6IjX8GXURn+SRF5w9yGS2nf8nMT/3zsreigXGYinM3pOO++M Vb5RIU2F4lc0DnmX0GPBdEn5qS9H2MzZsUu2Njyp//bKR7ACs19cb+LdptjBqI60yoXi pU6T5Pb5GBBbcAYzrQau6lX8bu5aNqcR8h2fNtEey2KhcXTb0MOHuDGCS/L02xJ07jEw pd/g== X-Gm-Message-State: AO0yUKUvS1R++FLfzRnHZ9jFQuGptX1//gKh6m9tfOvAy/0rm1b8xUgk PEocqe9L6T88aOxBWjF4vzw7TGRhne6I1N9Ytb+5nQ== X-Google-Smtp-Source: AK7set8WsZzMsy0cCh61baXpaP/uruzPQf234WhzuEKuB1qk2rSEFCN27zVpKno6vdPAcpHEv6LUk+hqrLE7ujtgZqc= X-Received: by 2002:a67:cb9e:0:b0:3f7:211b:daa1 with SMTP id h30-20020a67cb9e000000b003f7211bdaa1mr3105003vsl.46.1676041445950; Fri, 10 Feb 2023 07:04:05 -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 10:03:40 -0500 Message-ID: To: Douglas McIlroy Content-Type: multipart/alternative; boundary="00000000000003debb05f459cf3e" Message-ID-Hash: EQ3SC2IFVATFIM3FYCOOZZQX7IDHCL22 X-Message-ID-Hash: EQ3SC2IFVATFIM3FYCOOZZQX7IDHCL22 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: --00000000000003debb05f459cf3e Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable I had to get off my mobile and to real network connection - here is the URL: https://www.tuhs.org/Archive/Applications/Circuit_Design/ =E1=90=A7 On Fri, Feb 10, 2023 at 8:20 AM Clem Cole wrote: > 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=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.com (see >> > https://retrocomputing.stackexchange.com/q/26301/26615) but so far >> there >> > is no satisfying answer. A "Circuit Design Language" (CDL) is mentione= d >> > 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 > --00000000000003debb05f459cf3e Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

I had to get off my mobile and to real net= work connection - here is the URL: https://www.tuhs.org/Archive/Applications/Cir= cuit_Design/
3D""=E1=90=A7

On Fri, Feb 10, 2023 at 8:20= AM Clem Cole <clemc@ccc.com> wr= ote:
FYI: The sources to CDL are in the TUHS archives. =C2=A0=C2=A0
=

O= n 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 expec= t more typos than usual
--00000000000003debb05f459cf3e--