I have the main unit.
type computer
country UK
year 1981
os Acotn MOS
cpu MOS Technology 6502/6512
speed 2 MHz
ram 32 KB
graphic 640×256
colors 8 colors
sound Texas Instruments SN76489, 4 channels
ports printer, parallel, serial
The Acorn BBC Microcomputer System, popularly known as the BBC Micro or simply the ”Beeb,” is one of the most iconic pieces of computing history, particularly in the United Kingdom.
Here is a summary of the Model B, which was the most popular version of the machine:
1. Origin and the BBC Literacy Project
The BBC Micro was designed and built by Acorn Computers for the British Broadcasting Corporation’s Computer Literacy Project in the early 1980s. The goal was to introduce computing to the general public and schools. Because of this initiative, the Model B became the standard computer in nearly every UK classroom for a decade.
2. Technical Specifications (Model B)
The Model B was advanced for its time (released in 1981) compared to rivals like the Sinclair ZX Spectrum or the Commodore 64.
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Processor: MOS Technology 6502 running at 2 MHz.
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RAM: 32 KB (The Model A had only 16 KB).
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Graphics: It featured several display modes, including the famous Teletext (Mode 7) and high-resolution color graphics.
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Operating System: It used Acorn MOS and a built-in, highly structured version of BASIC called BBC BASIC, which is still praised today for its speed and features.
3. Expansion and Connectivity
What set the Model B apart was its incredible ”expandability.” The bottom of the machine was lined with ports, including:
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The Tube: A high-speed interface for adding second processors.
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User Port & Analog Port: Allowed students to connect sensors, motors, and robotic arms.
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Econet: An early networking system that allowed classrooms to share files and printers.
4. Cultural Impact and Legacy
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Gaming: While designed for education, it had legendary games like Elite (the first 3D wireframe space trader), Repton, and Aviator.
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ARM Architecture: The success of the BBC Micro gave Acorn the resources to develop the ARM (Acorn RISC Machine) processor. This architecture eventually evolved into the chips that power almost every smartphone and tablet in the world today.