19 Sep
2001
19 Sep
'01
8:54 a.m.
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 had a Mac II, which used a 68881. I remember the 68882 being sold by
some people as a speed-up for the Mac II.
I bought a 68851 MMU so I could run A/UX on my Mac II. The 68851 added
functionality necessary for A/UX but did slow down memory access slightly.
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Ethusiasts Club at http://www.dittman.net/