MC68881 vs MC68882 (was Re: Mac Plus as a webserver...)

From: Chris Kennedy <chris_at_mainecoon.com>
Date: Wed Sep 19 12:43:30 2001

Ethan Dicks wrote:

> emanuel stiebler <emu_at_ecubics.com> wrote:

> > 68882 is right for 68030 & 68020. 68881 only foir 68020.
> > (talking about hardware, no software)
>
> My memory is that the parts were interchangable in hardware (presuming
> the speed was OK) but the performance was better at a given speed
> for the 68882 over the 68881.

Yep. I was a co-owner of a firm that build accelerators for the Ami;
in the lab we used '881s and '882s interchangeably -- just whatever
was handy. As far as the bus interface was concerned the '882 was
identical to the '881 -- it just took fewer clocks than the '881
for some operations.

--
Chris Kennedy
chris_at_mainecoon.com
http://www.mainecoon.com
PGP fingerprint: 4E99 10B6 7253 B048 6685  6CBC 55E1 20A3 108D AB97
Received on Wed Sep 19 2001 - 12:43:30 BST

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