# CS101 Assignment 1 Solution 2021 - Introduction to Computing Assignment

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CS101 ASSIGNMENT 1 SOLUTION SPRING 2021

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QUESTION NO 1:

Given is a snapshot of memory addresses E2 to F4 and CPU registers 0 to F. All bit patterns in the memory cells are represented in hexadecimal notation. CS101 Assignment 1 2021

Assume that the Program Counter has E2 as its initial value. Using the information provided in the above Figure 1, answer the following questions.

Note: Use the table provided in Appendix C on page 581 of the book.

SOLUTION:

Q.1) Determine the contents of register 1 when the machine halts.

15

Q.2) Write down the bit pattern (in hexadecimal) at memory address F3 when the halt instruction is executed.

0705

Q.3) How many times the machine instruction at address EE is executed before the machine halts

6

Q.4) Determine the contents of register 0 after the instruction at address EC is executed.

91

Q.5) Determine the contents of register 2 when the instruction at address F0 is executed.

07

QUESTION NO 2:

a. Perform binary addition on given numbers:

SOLUTION:

Find 20116

 24 23 22 21 20 Radix 2-1 2-2 2-3 2-4 16 8 4 2 1 12 14 18 116 1 0 1 0 0 0 0 0 1

The final Answer is 20 116=10100.0001

Find 714

 22 21 20 Radix 2-1 2-2 4 2 1 12 14 1 1 1 0 1

The final Answer is 7 14=111.01

b. Convert the following binary number into ASCII code and then into its equivalent decimal representation.

01001001010000010100110101011100

SOLUTION:

Divide from left in 8 Characters

01001001

01000001

01001101

01011100

 27 26 25 24 23 22 21 20 128 64 32 16 8 4 2 1 0 1 0 0 1 0 0 1 =73 0 1 0 0 0 0 0 1 =65 0 1 0 0 1 1 0 1 =77 0 1 0 1 1 1 0 0 =92

=73 =I

=65 =A

=77 =M

=92 =\

So

01001001010000010100110101011100 = IAM/s

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CS101 Assignment 1 Solution 2021

1. 