This is a Question of 260q1b

b) Study the following RTL steps. PC > MAR M[MAR] > MDR MDR > IR PC + 1 > PC PC > MAR M[MAR] > MDR MDR > MAR M[MAR] > MDR MDR > ACC PC + 1 > PC Assume some LMC instiuctions occupy two mailboxes. Let's consider instiuction STO 43. Two consecutive mailboxes are required to store the opcode (STO) and the operand (43). Write down the LMC instruction and addressing mode that can be best represented by the above RTL steps. [3] b) Study the following RTL steps. PC > MAR M[MAR] > MDR MDR > IR PC + 1 > PC PC > MAR M[MAR] > MDR MDR > MAR M[MAR] > MDR MDR > ACC PC + 1 > PC Assume some LMC instiuctions occupy two mailboxes. Let's consider instiuction STO 43. Two consecutive mailboxes are required to store the opcode (STO) and the operand (43). Write down the LMC instruction and addressing mode that can be best represented by the above RTL steps. [3]