BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/Los_Angeles BEGIN:DAYLIGHT DTSTART:20260308T030000 TZOFFSETFROM:-0800 TZOFFSETTO:-0700 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZNAME:PDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20251102T010000 TZOFFSETFROM:-0700 TZOFFSETTO:-0800 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZNAME:PST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20251202T022338Z UID:20A8A6E0-2020-4C0A-9F9B-A0A3998F64A4 DTSTART;TZID=America/Los_Angeles:20251111T190000 DTEND;TZID=America/Los_Angeles:20251111T210000 DESCRIPTION:This is a hybrid in-person and online event. Pre-registration i s required for either.\n\n>> DIFFERENT LOCATION FOR IN-PERSON MEETING THIS MONTH!\n\nThis presentation will discuss the pioneering microprocessor R& D efforts at Bell Labs in 1976-1982 which created a new chip architecture and physical design. New test and verification methods were needed to over come challenges in CMOS fabrication\, and many of this project’s inventi ons were forerunners of subsequent VLSI developments:\n\n- high-speed domi no circuits to reduce complex logic gate delay times\,\n- a twin-tub CMOS process for improved power efficiency and performance\,\n- interconnect-ce ntric logic design for signal delay reduction\,\n- gate-matrix layout whic h increased density\,\n- 32-bit wide internal and external transfers\, and \n- instructions which implemented certain UNIX operating system and C pro gramming language operations\n\nAs explained by Michael Condry in an [IEEE Spectrum story](https://spectrum.ieee.org/bellmac-32-ieee-milestone)\, th is device was designed with the intention of carrying both voice and compu tation into the future\, and CMOS was seen as a promising—but risky—al ternative to the NMOS and PMOS designs then in use.\n\nDuring this talk\, three of the project leaders will describe how their team overcame numerou s obstacles\, and how they exceeded their speed goal with a 6.4 MHz device in 2.5 micrometer CMOS technology. These efforts created the BELLMAC-32 s eries of microprocessors\, whose applications included telephony products. Their work was recognized this year with an [IEEE Milestone](https://ieee milestones.ethw.org/Milestone-Proposal:Development_of_the_Bellmac_Micropro cessor\,_1980).\n\nSpeaker(s): Michael Condry\, Sung (Steve) Mo Kang \, Vi ctor Huang\n\n925 Thompson Place\, Sunnyvale\, California\, United States\ , 94085\, Virtual: https://events.vtools.ieee.org/m/507828 LOCATION:925 Thompson Place\, Sunnyvale\, California\, United States\, 9408 5\, Virtual: https://events.vtools.ieee.org/m/507828 ORGANIZER:dmsnyder@ieee.org SEQUENCE:22 SUMMARY:Bell Labs’ Critical BELLMAC-32 Microprocessor Legacy URL;VALUE=URI:https://events.vtools.ieee.org/m/507828 X-ALT-DESC:Description: <br /><p><strong>This is a hybrid in-person and onl ine event. Pre-registration is required for either.</strong></p>\n<p><span style="color: rgb(224\, 62\, 45)\;">&gt\;&gt\; DIFFERENT LOCATION FOR IN- PERSON MEETING THIS MONTH!</span></p>\n<p>This presentation will discuss t he pioneering microprocessor R&amp\;D efforts at Bell Labs in 1976-1982 wh ich created a new chip architecture and physical design. New test and veri fication methods were needed to overcome challenges in CMOS fabrication\, and many of this project&rsquo\;s inventions were forerunners of subsequen t VLSI developments:</p>\n<ul>\n<li>high-speed domino circuits to reduce c omplex logic gate delay times\,</li>\n<li>a twin-tub CMOS process for impr oved power efficiency and performance\,</li>\n<li>interconnect-centric log ic design for signal delay reduction\,</li>\n<li>gate-matrix layout which increased density\,</li>\n<li>32-bit wide internal and external transfers\ , and</li>\n<li>instructions which implemented certain UNIX operating syst em and C programming language operations</li>\n</ul>\n<p>As explained by M ichael Condry in an <a href="https://spectrum.ieee.org/bellmac-32-ieee-mil estone" target="_blank" rel="noopener nofollow"><em>IEEE Spectrum</em> sto ry</a>\, this device was designed with the intention of carrying both voic e and computation into the future\, and CMOS was seen as a promising&mdash \;but risky&mdash\;alternative to the NMOS and PMOS designs then in use.</ p>\n<p>During this talk\, three of the project leaders will describe how t heir team overcame numerous obstacles\, and how they exceeded their speed goal with a 6.4 MHz device in 2.5 micrometer CMOS technology. These effort s created the BELLMAC-32 series of microprocessors\, whose applications in cluded telephony products. Their work was recognized this year with an <a href="https://ieeemilestones.ethw.org/Milestone-Proposal:Development_of_th e_Bellmac_Microprocessor\,_1980" target="_blank" rel="noopener nofollow">I EEE Milestone</a>.</p>\n<p>&nbsp\;</p> END:VEVENT END:VCALENDAR