Author: Johan Klockars (ctfs.celsiustech.se)
Date: 01-22-2002 17:06
> I donīt know which one is most
> incompatible of PPC/Coldfire, but non of
Huh?
The PPC is not compatible with the 68k in any way whatsoever. Unless you count the fact that it usually has the same byte order.
The Coldfire being used for the new Atari compatible is mostly compatible for the instructions it implements. It just lacks quite a few.
> 5200 which has a 603E processor at 75MHZ,
> is slover than an 8MHZ ST. Yes it is true,
> and the reason is the emulation. After
> some research I found out that it emulates
> an 17MHZ 68020! This is
It does emulate an '020 (no FPU or MMU, but with the new addressing modes etc). It's been a while since I used a PPC Mac emulating 68k, so I don't recall how quick it was. There was a third party emulator available that was a lot faster than the original Apple one, however, and Apple later improved theirs too.
> we better believe it. Sorry mate, but we
> just canīt ignore the fact that all
> emulation sucks.
Well, ARAnyM has been reported as faster than an AB040 on a reasonable PC. That is without JIT conversion into x86 code (which apparently is used by MagicPC and which is available for the UAE CPU engine used by ARAnyM).
By the way, unlike a real '040, the ARAnyM CPU engine actually does include those FPU instructions you want. ;-)
|
