Specifying operands in instructions
1.Operands are the entities operated upon by the instructions.
2.Recall that operands may have to be fetched from a memory location to execute an operation.
-Memory location have addresses using which they can be accessed
3.Operands may also be stored in the general purpose registers.
-Intermediate volue of some computation which will be required immediately for subsequent computations.
-Registers also have address.
4.Specify the operands on which the instruction is to operate involves specifying the address of the operands.
-address can be of a memory location or a register.