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([2a02:8109:b6bf:99bc:ddd2:e236:82e8:ff69]) by smtp.gmail.com with ESMTPSA id r9-20020a170906a20900b007c14ae38a80sm1880627ejy.122.2023.02.09.21.36.55 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 09 Feb 2023 21:36:56 -0800 (PST) Message-ID: <854dfba0-6cf2-57a4-3995-c57571205d1f@googlemail.com> Date: Fri, 10 Feb 2023 06:36:55 +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 To: tuhs@tuhs.org Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Message-ID-Hash: MLACOBE6RG2XM264WG7SDYHH2VEHH4PM X-Message-ID-Hash: MLACOBE6RG2XM264WG7SDYHH2VEHH4PM 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 X-Mailman-Version: 3.3.6b1 Precedence: list Subject: [TUHS] 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 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