# Answer to Question #244717 in Electrical Engineering for Manju

Question #244717
1. In an assignment given on CSE211, a student is assigned the following task
3. Consider PC = last digits of your registration no
4. Place your date of birth including your date and month of birth into the DR
eg: 0108 – 01 date and 08 as month
5. Now perform the below given task
AR  PC
M[AR] DR
IR M[AR]
Explain the contents of the memory after the execution of second instruction.
2. If PC = 789 H , how CPU will fetch the instruction(binary code) from memory using common bus
system explain in detail.
1
2021-10-01T07:07:02-0400

Part 1:

Taking the student’s registration number to be:

117/78013/2020

We can execute this task as follows:

We begin by low-order leaving: With the specifications:

AR ß PC

M[AR] ßDR

IRß M[AR]

We determine that the program counter (PC) will require 12-bits to execute this task

Therefore,

Number of words = 256K words = 28 *210 words Number of bits pre each word = 32 bit = 25 bit Number of registers = 64 bit = 26 Register a) operation code = 7 bits, register code = 6 bits, address part = 18 bits

Part 2: With a PC = 789 H , the CPU will fetch the instruction(binary code) from memory using common bus system by using a bus which is constructed using multiplexer of equal capacity like a 4-unit. This will enable a set of registers to share a common bus for data transfer. Data Transfer Using the Bus.

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