Re: Instruction And Data memory

On Mon, 23 May 2005 13:56:58 +0000, Ken Smith wrote:

> In article <pan.2005.05.22.18.27.37.278277@xxxxxxxxxx>,
> keith <krw@xxxxxxxxxx> wrote:
> [...]
>>Not at all. There is a rather big difference between the two. A modern
>>x86 doesn't do well with self-modifying code, but it can. An 8051 OTOH.
>>The first is clearly Princeton and the latter clearly Harvard.
>
> The PIC is a better example for Harvard. The 8051 uses the same bus but a
> different command signal. The PIC has a bus just for instuctions.

IIRC, I once scoured the PIC data*** - _A_ PIC data*** - to see how
hard a lookup table would be. Turns out it's a SOB.

Thanks,
Rich

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