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[[Sophie Wilson]] and [[Steve Furber]] designed a reference model in [[BBC BASIC]] in just 808 lines of code. The first processor, the {{armh|ARM1}}, was fabricated on [[VLSI Technology]]'s [[3 µm process]] using just 24,800 transistors. First silicon prototypes were delivered on April 26 1985.
 
[[Sophie Wilson]] and [[Steve Furber]] designed a reference model in [[BBC BASIC]] in just 808 lines of code. The first processor, the {{armh|ARM1}}, was fabricated on [[VLSI Technology]]'s [[3 µm process]] using just 24,800 transistors. First silicon prototypes were delivered on April 26 1985.
  
The ARM1 had a few major bottlenecks - primarily the lack of hardware [[multiplication]] support resulted in considerable performance issues in related code. The problem was compounded by the fact that the ARM1 had no ability to support [[coprocessors]] which were needed for scientific applications that could make use of a powerful [[FPU]] coprocessor. By the following year Acorn reimplemented the ARM1 on a smaller process along with a number of enhancements designed to address those precise problems. The new design became the [[ARM2]].
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The ARM1 had a few major bottlenecks - primarily the lack of hardware [[multiplication]] support resulted in considerable performance issues in related code. The problem was compounded by the fact that the ARM1 had no ability to support [[coprocessors]] which were needed for scientific applications that could make use of a powerful [[FPU]] coprocessor. By the following year Acorn reimplemented the ARM1 on a smaller process along with a number of enhancements designed to address those precise problems.
  
 
== ARM2 & ARM3 ==
 
== ARM2 & ARM3 ==

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