The first microcomputer: The transfluxor-powered Arma Micro Computer from 1962
This article meticulously unveils the Arma Micro Computer from 1962, a forgotten pioneer in compact aerospace computing that predates traditional "microcomputers" by over a decade. It delves into its unusual 22-bit serial architecture and non-destructive transfluxor memory, challenging our modern definitions of early computing history. HN readers appreciate this deep dive into obscure, groundbreaking technology and the re-evaluation of computing milestones.
The Lowdown
The article introduces the Arma Micro Computer from 1962, presenting it as a contender for the title of the "first microcomputer," long before the widely recognized Altair 8800 or Apple I. Designed for demanding space applications like inertial navigation and engine control, this 20-pound, 0.4 cubic-foot device offers a glimpse into a rarely discussed facet of early digital computing: the specialized, miniaturized aerospace computers of the 1960s.<ul><li>The Arma Micro Computer, while not a "microcomputer" by modern microprocessor-based definitions, was remarkably compact for its time, smaller than an Apple II.</li><li>It featured a unique 22-bit serial architecture and utilized innovative "transfluxor" memory, which allowed for non-destructive data readout, improving reliability for critical programs.</li><li>Built with silicon transistors and diodes, its circuits were assembled on small wafers, mounted onto ruggedized "sandwich" PCBs designed to withstand extreme aerospace environments (100g shock, wide temperatures).</li><li>Despite a 1 MHz clock speed, its serial nature limited it to 36,000 operations per second, but it boasted a rich instruction set including hardware multiply, divide, and square root, a contrast to early microprocessors.</li><li>Arma, with a history spanning from WWI naval targeting systems (Torpedo Data Computer) to Atlas ICBM guidance systems (pioneering PROM), consistently pushed the boundaries of compact digital computing.</li><li>The article highlights how the term "microcomputer" itself is a fluid, socially constructed definition, and the Arma machine meets broader definitions of a small, self-contained computing unit.</li><li>This line of computers evolved into systems for Navy ships, the E-2C Hawkeye, Concorde, and Air Force One, demonstrating its enduring legacy despite the company's eventual absorption and dissolution.</li></ul>The Arma Micro Computer serves as a compelling reminder that computing history is far richer and more diverse than commonly perceived. It unearths an important, often-overlooked lineage of robust, compact digital systems developed for critical aerospace applications, redefining our understanding of what constituted a "microcomputer" in its earliest forms and showcasing the ingenuity behind pre-integrated circuit technology.