English Computing Dictionary
◊ I860
i860
A 32/64-bit {superscalar} {RISC} {microprocessor}
from {Intel}, released in 1989. Originally codenamed "N10".
It has a 32-bit integer {ALU} and a 64-bit {floating-point
unit}. It has a 64-bit {data bus} with an initialisation mode
which only uses eight bits of the data bus to allow the use of
a small {boot ROM}. It has a 32-bit wide {instruction cache}
and a separate 64-bit wide {data cache}. It uses {register
scoreboarding} and {register bypassing}. The {clock rate} is
33 MHz with a clock-doubled version available.
(1998-03-28)
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