Yann Guidon / YGDESThat one is going to be one of the most controversial because it goes against most of the established practices.
Recently I have decided to side with Harvard. There are two reasons : speed and safety.
As a side-benefit, it allows the designer to use weird instruction widths.
(to be continued, the subject is quite hot)
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Most contemporary processors are actually Harvard-architecture devices in disguise. If your CPU has a split instruction and data cache, it's actually Harvard architecture under the hood.
Looks like Harvard architecture won this debate.
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