1. Mar 17, 2008 #1

   mkbh_10

   

   What does the FETCH EXECUTE OVERLAP instruction mean ?

    

   mkbh_10, Mar 17, 2008
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3. Mar 17, 2008 #2

   berkeman

   

   Staff: Mentor

   It just looks like the execute of the current instruction is overlapped a bit with the fetching of the next instruction:
   
   http://www.geocities.com/siliconvalley/peaks/3938/z80arki.htm

    

   berkeman, Mar 17, 2008
4. Mar 17, 2008 #3

   TheAnalogKid83

   

   that does almost seem to be a something you would expect with pipelining or else you would have some gap of clock cycles between the stages each time the cpu fetches a new instruction.
   
   how common is the fetch-execute overlapping in modern cpus? it seems common sense to have the next instruction fetched by the time the preceding one is executed unless the code jumps memory locations . .

    

   TheAnalogKid83, Mar 17, 2008

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