Extra chip on M8186

From: Allison J Parent <allisonp_at_world.std.com>
Date: Tue Jul 8 10:39:31 1997

> The Floating Point socket will take either a KEF11-AA chip which
> holds floating point microcode, or you can plug a FPF11 board in next
> to the CPU and run the jumper cable to the socket. The FPF11 is
> 5 to 6 times faster than a KEF11-AA (and was accordingly more expensive

I have machines with both and the difference is noticeable even with
fairly simple stuff.

> I think a Commercial Instruction Set (CIS) microcode option may have be
> available as well, but I've never seen it installed. I'd guess it
> would've plugged into the "Spare" socket.

My 11/23b(+) has the CIS and FPP board. The CIS goes into spare.


Allison
Received on Tue Jul 08 1997 - 10:39:31 BST