~ Larry
On Tuesday, January 21, 2003, at 09:22 PM, Larry Friedman wrote:
http://www.everymac.com/systems/by_processor/68lc040.html http://www.tspintl.com/support/tsp/quadra.htm http://burks.brighton.ac.uk/burks/foldoc/92/75.htm http://www.pix.net/languard/mc68040.shtml http://www.crashtips.com/macacronyms.htmlAnd that's just the surface. The 68LC040 did not have an FPU. Larry On Tuesday, January 21, 2003, at 09:05 PM, Marc Sira wrote:I'm not sure where you got that idea, but Paul is correct, and the 270c hasAre you sure of the 280c being faster than the 270c? I hadThe 270c doesn't have a built in FPU. However you can take advantage of an
supposed that the FPU in the 270c might more than make up for the 030-040
difference.
FPU if you run the 270c in a DuoDock (FPU was optional in the original Dock
and standard in the DuoDock II & DuoDock Plus).
The 270c uses a 68LC030 and the 280c uses a 68LC040. The LC
nomenclature is referring to a lack of FPU.
a built-in FPU (I used to run Infini-D on mine). It also has a 68030, not a
"68LC030" - I'm not certain that model even exists , but if it does it
refers to something other than the lack of an on-chip FPU, since the FPU is
external to the 68030 in any case.
In terms of actually answering the question, a 68[LC]040 is theoretically twice
as fast as a 68030 at integer ops. My experience is that the real-world
difference on a Mac is somewhat less than that, though this may partly reflect
the tendency to run a later OS version on a 68040. Between a Duo 280 and 270
you'll find that the 280 is somewhat appreciably faster most of the time and
considerably faster for integer-only number crunching, but vastly slower (or
simply impossible to use) for floating-point work. Since you're only likely to
actually need an FPU for things like non-realtime graphics rendering, you can
decide which would suit your needs better. Most Mac software never hits the
FPU, especially 68k stuff (since the presence of one is so hit-and-miss, and
failing to find it is usually a crashing matter on a stock OS).
--
Marc Sira | [EMAIL PROTECTED]
If you can't play with words, what good are they?
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