Re: PPC incompatible software

Patrik Schindler wrote:

any of you observe another software which reproducibly crashes
only on PPCs but not on 68k Macs?

Yes, this will occur for any 68k encoded Mac software that requires
Floating Point Math, i.e.; an onboard FPU to be present. This is a 68k
FPU that's required, not a built-in PPC FPU.

PPC's 68k emulation does not emulate a 68k FPU, so any 68k software
requiring an FPU, will not run on that PPC Mac.

The workaround for this is a 3rd party FPU emulator, to enable those
68k programs to run on PPC hardware.

The best 68k FPU emulator solution for PPC Mac's is PowerFPU.
<http://macintoshgarden.org/apps/powerfpu>

Not saying this is the cause of your 68k program not working on PPC
hardware. Only, that it does occur for any 68k program that requires
floating point math.

Another cause of 68k software being unable to run on PPC Macintosh, is
any 68k software that requires the presence of a Memory Management Unit
(MMU). <https://en.wikipedia.org/wiki/Memory_management_unit>

PPC's 68k emulation does not emulate a 68k MMU either, and I don't know
of a 3rd party soulution to this one. It is however, rare for 68k
software to demand this. It happens, but it's rare.

--
dee