I wonder why it's faster - specifically \*how\* it's more efficient. (Admittedly...

grishka · on Feb 4, 2022

If my understanding is correct, it doesn't implement the MMU (which latest OS 9 versions require), takes some other shortcuts and does JIT.

wk_end · on Feb 4, 2022

qemu actually tries to emulate all of the hardware in a Mac; also, I believe its CPU emulation is just interpreted though someone correct me if I'm wrong. SheepShaver emulates the CPU with a JIT and then patches the emulated MacOS so that calls to it run as native code.

anthk · on Feb 4, 2022

SheepShaver is hacky, I know it since BasiliskII times, same people. SS is faster, but nowadays the gap against Qemu is not that big on a modern machine. Also, Qemu will provide an ATI Rage device for the G3/G4 machine, so you may be able to correctly play a good chunk of 3D games released for Mac OS 9.

>I believe its CPU emulation is just interpreted

Something between interpreted and a JIT. TCG:

https://wiki.qemu.org/Documentation/TCG

That's why I say Qemu is not as slow as Bochs.