From Newsgroup: comp.sys.mac.system
In article <230720031019237980%
zcoevgg@znp.pbz>, Michael Allbritton <
zcoevgg@znp.pbz> wrote:
There is no 68K emulation in Mac OS 9, and there hasn't been since
Mac OS 8.5.
You're completely wacked. I run 68000 code on my OS 9 box all the time.
There seems to be a bit of confusion as to what "68K emulation" means.
Yes, and I think it's on your part. Whether on purpose or not, you're spreading false information, and you need to educate yourself.
I never said there was no 68K CODE in Classic Mac OS; the legacy 68K
code in Classic Mac OS is what allows old 68K apps to run.
Sorry, legacy 68K code in the system has nothing to do with letting 68K
apps to run. They would both need to be emulated on a PPC processor.
What the 68K emulation did was allow newer versions of the Mac OS, such
as 7.5.x, to run on both the new PowerMacs that were coming out in 1994
and older machines with 680x0 (non-PowerPC) processors.
No, 68K emulation allowed ANY 68K code, whether part of the system or
part of a 68K application, to run. 68K code CANNOT run on a PPC chip!
That's like trying to put a VHS tape in your DVD burner -- even if it
would fit, it wouldn't do anything. Emulation was required to form a
bridge between the chip and the software -- kind of like running a
cable from your VCR to the DVD burner.
Older machines with 68K processors had no need of emulation whatsoever.
This emulation
was removed from Mac OS 8.5 when Apple dropped official support for
680x0 processors from the OS.
I believe you're conveniently blind to the fact that McTech says he
runs 68K code on OS 9 all the time. How could he do this without
emulation?
Apple dropped support for 68K chips from the OS, since keeping support
for 68K chips would require all new PPC code to be duplicated in 68K
code. (Or a PPC emulator to be written for the 68K chips, which would
never happen.)
--
-Thomas
e-mail me at thomasareed at philadelphia.net minus phil
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