Fetching cycle is the basic operation cycle of a computer.
It is the process by which a computer retrieves a program instruction from its
memory, determines what actions the instruction requires, and carries out those
actions. This cycle is repeated continuously by the central processing unit
(CPU), from bootup to when the computer is shut down.
Execute cycle is the instruction in order to work out what actions should be performed to execute it. This involves examining the opcode to see which of the machine codes in the CPU's instruction set it corresponds to, and also checking which addressing mode needs to be used to obtain any required data. Therefore, using the CPU model from this tutorial, bits 16 to 23 should be examined.
Execute cycle is the instruction in order to work out what actions should be performed to execute it. This involves examining the opcode to see which of the machine codes in the CPU's instruction set it corresponds to, and also checking which addressing mode needs to be used to obtain any required data. Therefore, using the CPU model from this tutorial, bits 16 to 23 should be examined.
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