8 Jul
1997
8 Jul
'97
3:39 a.m.
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