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([2a02:8109:b6bf:99bc:c830:535c:cc35:4c60]) by smtp.gmail.com with ESMTPSA id x24-20020a170906135800b00872a726783dsm6432866ejb.217.2023.02.13.01.22.43 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 13 Feb 2023 01:22:44 -0800 (PST) Message-ID: Date: Mon, 13 Feb 2023 10:22:43 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0) Gecko/20100101 Thunderbird/102.7.2 Content-Language: en-US To: scj@yaccman.com References: <854dfba0-6cf2-57a4-3995-c57571205d1f@googlemail.com> In-Reply-To: <854dfba0-6cf2-57a4-3995-c57571205d1f@googlemail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Message-ID-Hash: FIGK7YCJDL2B2A5KOJ7HP6XUVNPUSKWW X-Message-ID-Hash: FIGK7YCJDL2B2A5KOJ7HP6XUVNPUSKWW X-MailFrom: flipper.x3r@googlemail.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: tuhs@tuhs.org, bakul@iitbombay.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: From: Christian Dreier via TUHS Reply-To: Christian Dreier Hello Steven, I have questions about a logic design tool mentioned in an old Unix promotion by AT&T and apparently presented by you. Do you have some information about this software? See below for further details about my question. See also TUHS mailing list: https://minnie.tuhs.org/pipermail/tuhs/2023-February/thread.html#27724 Best regards, Christian Am 10.02.23 um 06:36 schrieb Christian Dreier: > 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