The format of double operand instruction of a CPU is opcode Source operand Destination operand 4bits 4bits 4bits If 12 double operand instructions

3. Consider a 16-bit processor in which the following appears in main memory, starting at location 101.

The first part of the first word indicates that this instruction loads a value into an accumulator. The Mode field specifies an addressing mode and, if appropriate, indicates a source register; assume that when used, the source register is R1, which has a value of 500. There is also a base register that contains the value 100. The value of 412 in location 102  may be part of the address calculation. Assume that location 399 contains the value 999, location 400 contains the value 1000, and so on. Determine the effective address and the operand to be loaded for the following address modes:

• Indirect            b. Register indirect               c. Displacement