How to detect if an emulator is being used ?

[Piru]

There are certain (never used) special cases of 68k opcodes which are not working right in UAE.

Last I checked

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move.l a7,-(a7)...works like on 68000 regardless on the CPU selection. So if you appeear to have a 68010+ CPU and the opcode stores the a7 value like on 68000 you can be sure that you're running under UAE.

I was reading the 68k manuals and noticed that 68000 and other CPUs varied on whether the original or predecremented a7 was stored in this case. I wasn't that surprised to learn that UAE always works like 68000 here...