List and briefly define the possible states that define an instruction execution

Solution of List and briefly define the possible states that define an instruction execution :

1) Instruction address calculation (iac): 

Determine the address of the next instruction to be executed. Usually, this involves adding a fixed number to the address of the previous instruction. For example, if each instruction is 16 bits long and memory is organized into 16-bit words, then add 1 to the previous address. If, instead, memory is organized as individually addressable 8-bit bytes, then add 2 to the previous address.

2) Instruction fetch (if): 

Read instruction from its memory location into the processor.

3) Instruction operation decoding (iod): 

Analyze instruction to determine type of operation to be performed and operand(s) to be used.

List and briefly define the possible states that define an instruction execution

4) Operand address calculation (oac): 

If the operation involves reference to an operand in memory or available via I/O, then determine the address of the operand.

5) Operand fetch (of): 

Fetch the operand from memory or read it in from I/O.

6) Data operation (do):

 Perform the operation indicated in the instruction.

7) Operand store (os):

 Write the result into memory or out to I/O.