Diosdado “Dado” Banatao, a Filipino entrepreneur and engineer whose innovations helped shape the modern personal computer and whose success in Silicon Valley inspired generations of Filipinos, has died. He was 79.
Banatao’s family confirmed his passing in a message posted at Banatao.com, saying he died on Christmas Day of 2025 at the campus of Stanford University, his alma mater. “He was 5 months shy of his 80th birthday, and ultimately succumbed to complications from a neurological disorder that hit him late in his life.”
Born on May 23, 1946, in Iguig, Cagayan, Banatao rose from humble beginnings to become one of the most influential Filipino figures in global technology.
The son of a rice farmer and a housekeeper, he was known for a rags-to-riches journey that began with walking barefoot on dirt roads to attend Malabbac Elementary School.
He later studied at the Jesuit-run Ateneo de Tuguegarao before earning a Bachelor of Science in Electrical Engineering, graduating cum laude, from the Mapúa Institute of Technology.
After college, Banatao declined several job offers in the Philippines, including one from Meralco. He briefly trained as a pilot with Philippine Airlines before moving to the United States, where he joined Boeing as a design engineer and worked on the Boeing 747 program.
He later completed a master’s degree in Electrical Engineering and Computer Science at Stanford University in 1972, where he joined the Homebrew Computer Club and interacted with early personal computing pioneers, including Steve Jobs and Steve Wozniak.
Banatao went on to work at major technology firms such as National Semiconductor, Intersil, Commodore International, and Seeq Technology.
He is widely credited with breakthrough semiconductor and computing innovations, including the first 10-Mbit Ethernet CMOS chip with silicon coupler data-link control and transceiver, the first system logic chipsets for IBM’s PC-XT and PC-AT, the local bus concept, and one of the earliest graphical user interface (GUI) accelerator chips for personal computers. These technologies became foundational to the modern computing industry.
A three-time startup founder, Banatao co-founded Mostron in 1984, Chips and Technologies in 1985, and S3 Graphics in 1989.
Chips and Technologies quickly became a key supplier of PC chipsets and was later acquired by Intel for about $300 million. S3 Graphics emerged as a global leader in graphics chips during the 1990s.
In 2000, Banatao founded Tallwood Venture Capital using his own capital and continued backing high-impact technology companies. He was also involved in SiRF Technology, which helped drive the consumer adoption of GPS, and later served as chief executive officer of Ikanos Communications in 2010.
Beyond his business achievements, Banatao devoted much of his later life to strengthening the Philippine innovation ecosystem.
In 2017, the Asian Institute of Management–Dado Banatao Incubator (AIM-DBI) was established to address the country’s lack of structured support programs for startup entrepreneurs.
Since its launch, the incubator has helped nurture more than 70 startups from across the Philippines, supported job creation nationwide, and earned multiple awards and recognitions for its role in advancing local entrepreneurship.
In a Facebook post that first reported Banatao’s death, former Department of Finance secretary Cesar Purisima described the legendary figure as “a brilliant engineer, visionary tech entrepreneur, and a true pride of the Philippines,” noting how his journey from Cagayan Valley to Silicon Valley became “one of the most inspiring Filipino success stories on the global stage.”
“Dado helped shape the modern personal computer,” Purisima wrote, citing Banatao’s role in developing the Ethernet CMOS chip, IBM PC system logic chipsets, graphics accelerators, and the local bus architecture — “technologies that became foundational to today’s computing industry.”
Purisima also emphasized that Banatao’s greatest legacy went beyond technology.
“Yet beyond his remarkable achievements in technology, Dado’s greatest legacy was his faith in people,” he said, highlighting Banatao’s work with his wife, Maria, through the Philippine Development Foundation (PhilDev) and the Dado Banatao Educational Foundation.
Together, they championed education, access, and opportunity for Filipino students, provided scholarships, supported STEM education, and built a modern computer center in Banatao’s childhood school in Iguig.
The couple also funded the Center for Information Technology Research in the Interest of Society (CITRIS) and the Banatao Institute at the University of California, Berkeley, a research center focused on IT solutions with broad societal and economic benefits.
“He believed deeply in Filipino talent and often emphasized that talent was never the problem — what mattered was opportunity and access to world-class technology education,” Purisima wrote.
Quoting Banatao, he added: “My story could be your story,” a line Banatao often used to remind young Filipinos that perseverance, education, and opportunity could change lives.
This story was updated to include the date and cause of Banatao’s death.
