from
The Free On-line Dictionary of Computing (8 July 2008)
Ferranti F100-L
F100-L
<processor> A {processor}, with 16-bit addressing, {registers}
and data paths and a 1-bit serial {ALU}. The F100-L could
only access 32K of memory (one address bit was used for
{indirection}). It was designed by a British company for the
British Military.
The unique feature of the F100-L was that it had a complete
control bus available for a {coprocessor}. Any instruction
the F100-L couldn't decode was sent directly to the
coprocessor for processing. Applications for coprocessors at
the time were limited, but the design is still used in modern
processors, such as the {National Semiconductor 32000} series.
The {disk operating system} was written by Alec Cawley.
(2007-05-19)