Processor Internal Architecture
Dispatch ports in the Pentium 4 processor
Processor Internal Architecture & Buses
Basic instruction flow
One useful division that computer architects use when talking about CPUs is that of "front end" vs. "back end" or "execution engine." When instructions are fetched from the cache or main memory, they must be decoded and dispatched for execution. This fetching, decoding and dispatching takes place in the processor's front end.
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