资料来源 : Free On-Line Dictionary of Computing
Intel 487SX
A version of the {Intel 486DX} {microprocessor}
with an extra pin, for use in the {coprocessor} socket of an
{Intel 486SX} system. The 487SX provides the {FPU} which is
missing in the 486SX.
Although the 486SX is completely disabled when you install a
487SX, the 487SX design requires that you leave the 486SX in
your PC [why?], rather than use it elsewhere. Intel admits
that in some systems you can unplug the 486SX and fit a 487SX
in its place but they don't guarantee that it will always
work.
See {Intel 486}.
(1995-05-10)