| From: | Matt Sealey |
| Date: | 23 Apr 2001 at 14:07:41 |
| Subject: | Re: Common misconception (was Re: Voyager Image Decoders) |
Hello Alan
On 23-Apr-01, you wrote:
> hi,
>
>> which has enough patches to exec.library to make a difference. The 68k
>> emulator is known to be lacklustre in performance terms compared to that
>> of MorphOS (which can hit 68060 speeds if it tries, H&P were going
>> on about how a G4 would be required to make that cmfortable level)
>
> I have yet to see any new 68k emulator for MorphOS in action (there was
> talk about JIT etc going into it) but what I can say is that even with a
> 240MHz PPC I get no where NEAR 060 speeds with MorphOS when its doing 060
> emulation. the benchmark of lame.060 in last months AA is pretty close to
> the mark. the 060 has a VERY powerful FPU (compared to the 040 its over
> 15x better).
The 68060 FPU is very good, and that is the 68k emulator's stumbling block
for sure (simply because the FPU on a 603e isn't as fast, and scarily enough
the 604e one is slower :)
Do some integer tests, run around in Workbench for a while, and it'll feel
pretty much like it would on a 68060. The context switches between
emulation and PPC native is what gives it a sluggish feel, but Ralph
speeded those up a lot in the last release, and is working on making
it even faster..
> I also believe the Mac people when they say you need a G3-450 to get 060
> speeds in emulation
How would Mac people know? They can't use a 68060 at all.. Mac emulation
on the Amiga has to disable caches and hack MacOS ("OS8.x support" boxes
in SS) to get it to work even at all..
Thanks
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