Reply to post: Re: Illegal instructions

Talk about a calculated RISC: If you think you can do a better job than Arm at designing CPUs, now's your chance

Bruce Hoult

Re: Illegal instructions

Apple used illegal instructions to call system subroutines in the original MacOS, including many simple library things such as NewPtr() or opening and closing and reading disk files. Every M68000 instruction of the form 0xAnnn is an illegal instruction and Apple eventually used most of them.

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