21 Sep
2001
21 Sep
'01
12:07 p.m.
Ethan Dicks skrev:
--- emanuel stiebler <emu(a)ecubics.com> wrote:
> Iggy Drougge wrote:
>
> > >Yeah, the SE/30 is a 68030, 16MHz; with 68882 FPU...
> >
> > Me too, but shouldn't that be a 68881?
>
> 68882 is right for 68030 & 68020. 68881 only foir 68020.
> (talking about hardware, no software)
I _think_ the Amiga 3000/16 had a 16Mhz 68881 and the
A3000/25
had a 25Mhz 68882, but I could easily be mistaken.
There are accelerator boards with 68030+68881 as well.
As for the 68881, it may be run with the 68000 as well. It was used in the
Atari Mega ST series in such a configuration.
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. I never did any rendering on my Amigas,
so my use of the floating point was rather limited. I skipped over
the '020 when I was heavily into Amigas, leaping from a massively
expanded A1000 (Rejuvinator, Spirit InBoard, Microbotics Starboard w/Star-
Drive, ROM switcher, etc.) to an A3000/25.
I didn't have any FPU when I was into rendering. Didn't have any MMU either.
Or a hard drive. Fourteen MHz, two MB of chip RAM and a DD floppy drive is all
you need. ^_^
--
En ligne avec Thor 2.6a.
"But software which OpenBSD uses and redistributes must be free to all (be
they people or companies), for any purpose they wish to use it, including
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or atomic bombs to be dropped on Australia."
- Theo de Raadt