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| Micral | |
|---|---|
| Name | Micral |
| Caption | Micral microcomputer |
| Manufacturer | R2E |
| Type | Microcomputer |
| Released | 1973 |
| Cpu | Intel 8008 |
| Memory | 2 KB–16 KB |
| Os | None (monitor ROMs, later CP/M on derivatives) |
Micral
The Micral was an early microcomputer developed by a French engineering firm that implemented an Intel 8008 central processing unit in a commercially produced system. It appeared in the early 1970s and was intended for industrial control, scientific instrumentation, and business automation rather than hobbyist use. The Micral's introduction intersected with developments at Intel, Fairchild Semiconductor, and design practices emerging from research laboratories such as INRIA and universities including Université Pierre et Marie Curie.
The Micral project originated at the French firm R2E (Réalisation d'Etudes Electroniques) under the direction of engineer François Gernelle, who had connections to research groups at CNRS and companies such as Schneider Electric. Influences included contemporary work at Honeywell and Digital Equipment Corporation where minicomputer architectures inspired miniaturization. The Micral's development paralleled milestones from Xerox PARC, Hewlett-Packard, and Bell Labs in microprocessor experimentation, and it benefited from the availability of the Intel 8008 introduced in 1972. Presentation to potential customers occurred during exhibitions attended by representatives from ESA, Thales Group, Société Générale and industrial research centers, aiming to replace teletype-driven data acquisition systems used at CERN and CEA installations.
The Micral used the 8-bit Intel 8008 microprocessor clocked at modest frequencies consistent with early integrated circuits. Memory systems combined static and dynamic modules provided by suppliers like Texas Instruments and Motorola, resulting in configurations from 2 KB to 16 KB of core and semiconductor memory. Peripheral interfaces incorporated serial links compatible with RS-232 equipment used in labs operated by Électricité de France and aerospace firms such as Dassault Aviation. The chassis and power designs were influenced by industrial equipment standards found at Alstom and telecommunications standards from France Télécom. Diskless by default, the Micral used removable media and punch tape readers similar to those deployed at IBM installations and instrumentation systems used by Schneider Electric.
R2E produced successive Micral models to serve diverse customers including automation divisions of Renault and research teams at CNES. Variants added expanded memory, improved I/O modules sourced from suppliers like STMicroelectronics, and multi-board backplanes compatible with rack systems used by Siemens and Thomson-CSF. Later derivative products adapted bus architectures that echoed design choices in machines from MITS, Altair, and North Star; some variants supported floppy disk controllers developed in collaboration with engineering groups at Laboratoire Central des Ponts et Chaussées and private vendors associated with Bull.
Early Micral units shipped without full commercial operating systems, relying on monitor ROMs and bespoke control firmware written in assembly by teams connected to INRIA and university laboratories at Université Paris-Sud. Users developed application software for data logging and control that interfaced with instrumentation libraries used at CERN and process control suites implemented at Schneider Electric. As the microcomputer industry matured, some Micral derivatives supported portable operating systems such as CP/M adopted from developers linked to Digital Research and software toolchains influenced by work at Microsoft and Intel's developer community. Programming languages used included assembly influenced by Intel documentation and higher-level languages deployed in European research institutions, drawing on compiler technologies from Bull and academic projects at École Polytechnique.
Market reception was shaped by competition from early North American microcomputers from companies such as MITS (the Altair), Radio Shack (TRS-80), and Apple Computer. The Micral found niche acceptance among industrial clients like Renault, Alstom, and scientific establishments including CNRS laboratories, where robustness and service agreements mattered more than hobbyist ecosystems. Coverage in trade publications referenced contemporaneous announcements from Intel, Fairchild Semiconductor, and purchase considerations echoing procurement processes at European Space Agency facilities. Despite limited mass-market penetration compared to firms like Apple and Commodore, the Micral established a commercial precedent for microprocessor-based systems in European industry and influenced procurement at corporations such as Peugeot and public agencies like CNES.
Historically, the Micral is cited in discussions of the first commercially available microcomputers alongside machines from MITS, Kenbak Corporation, and experimental systems emerging from Xerox PARC and MIT. The Micral's early deployment demonstrated practical uses of the Intel 8008 in industrial automation, informing subsequent designs at Thomson-CSF and contributing know-how to European microelectronics firms like STMicroelectronics and Bull. Museums and archives have preserved Micral units, which are referenced in exhibitions curated by institutions such as the Musée des Arts et Métiers and academic retrospectives at Université Paris-Saclay and ENS. Its role in accelerating microprocessor adoption in continental Europe links it to later successes at companies including Atari, Amstrad, and Sinclair Research while intersecting with the broader history chronicled by historians who study the origins of personal and industrial computing.
Category:Microcomputers