The i487 SX was not really a Co Processor. It was a
normal
486 DX processor when installed
disable the onboard SX Processor and take over main operation of
the CPU/FPU. The i487 has one pin more than a normal 486 cpu, so
you need a special socket to install this chip.
A80487SX
A80487SX
SZ494
USA, SZ494
More Info and
Pictures Intel i487SX
Intel 80487 original
sealed
with little window
(nice)
curious text on the box,
perfect compatibility???
I thought the sx on board will be
disabled??
