Re: New Math Coprocessor - who has a need for it???

[kapffer@Informatik.Mathematik.Uni-Mainz.DE (Matthias Kapffer)]

In article <1993Jul13.110208.8271@ifi.unizh.ch>, gudat@avalon.physik.unizh.ch (gudat henrik) writes:
[...]
|> Furthermore, the NC consists of the finest parts only (sockets, ceramic
|> carriers etc.). This also means that the card is rather expensive (ca.
|> $200 without the 68882).
                    ^^^^^
                    |||||

I believe to remember that this card (as well as the FPE) has been announced with
the 68881. From the descriptions I have read, the difference between the 68881
and the 68882 (besides the 1) is *not* the time needed for the operations itself
(calculating sin(), etc.), but enhanced parallelism with the 680[23]0 CPU
resulting in a speedup of about 20%.

Does anybody *know* if a 882 would bring any advantage in an Apple II ? The NC
was designed for clock rates up to 25 MHz (according to my memory ...); do 882
FPUs with a higher rating have a better availability/price ?


				- Matthias Kapffer