Messages in this thread | | | Date | Tue, 15 Dec 1998 22:17:49 -0700 (MST) | From | The Lost Wizard <> | Subject | Re: NOP instruction |
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On Wed, 16 Dec 1998, Chris Wedgwood wrote:
> Several architectures have real NOPs -- Intel might be one of the few > that doesn't. > > (Hoping everyone will jump in with their favorite arch. now)
Well, here's an archaic one for you: The Motorola 6809 processor had a separate NOP coded as 12h (10h, 11h were "prefixes", 13h-1fh were misc instructions). Granted, it's an 8 bit processor :) (Mind you, any "invalid" opcodes acted as NOPs as well under that one)
William Astle
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