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History of ARM:

BBC & ARM1

In 1980 BBC started the Computer Literacy Project. At the time BBC wanted the project to center around a microcomputer. BBC entered talks with a number of computer companies, among them was Acorn Computers. Early in 1980 Acorn released the Acorn Atom and by that time they were already working on their next project, Proton. Acorn got an early prototype working to demo BBC. The Proton met BBC's specification resulting in a contract signed in February of 1981. In December of 1981 Acorn Computers introduced the BBC Micro, becoming a great success.

The Acorn BBC Micro made use of the 6502, a highly popular 8-bit microprocessor operating at 2 MHz. The early 80s were transforming quickly and by January 1983 Apple introduced the Apple Lisa which utilized the Motorola 68000, a much more powerful 16-bit microprocessor operating at 5 MHz. The Lisa included many other cutting edge features such as a windowing environment.

Recognizing the need for more powerful computers, Acorn formed the Advanced Research and Development division. The group was established in an attempt to develop a their own RISC processor. The initial outcome of the project was the first ARM processor. Initially stood for Acorn RISC Machine, the name was later changed to Advanced RISC Machine.

The first processor, the ARM1, was fabricated on VLSI Technology's 3 µm process using just 25,000 transistors.


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