Subject: Computer Organization and Architecture

2b

Show the changes of contents in Instruction Register (IR), Program Counter (PC), Memory Address Register (MAR), Memory Data Register (MDR) and Accumulator (A) during the execution of Instruction 54 and Instruction 55. Program counter: 53 Value in memory location 53: 574 (LOAD) Value in memory location 54: 275 (SUB) Value in memory location 55: 376 (STORE) Value in memory location 74: CB16 Value in memory location 75: 516