The CPU card in the Prime 2455 uses 17 pin-grid-array packages
with what I think is the Fairchild hallmark (an 'F' with a bar
above and a bar below), and the part number is MB15604.
Is this an FPGA? Can anyone point me to a datasheet for this
device, somewhere on the net, perhaps? Or, failing that, a
copy in some format?
tia,
-doug quebbeman