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> Explicit access to PC as a register, makes "computed goto" trivial and very natural.

Am I right in thinking ARM uses this model? I haven't worked on them since ARM2, but I have a hazy recollection...

Sort of. R15 is the PC, but you also have branch instructions which have very large literal values which in practice you'll always use.

Yes it does.

(Thinks of a typical SWI handler...)