Introduction to Computing (CS101) Assignment # 01 Solution 2021

 

Introduction to Computing (CS101) Assignment # 01 Spring 2021 Name: Abdul Rehman

 

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.

 

Introduction to Computing (CS101)

 

 

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

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

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

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

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

 

 

 

Ans:

1.   15

2.   0705

3.   6

4.   91

5.   07

 

 

Part: 2

 

A.   Perform binary addition on given numbers:

 

201/16 and 71/4.

 

 

28	24	22	21	20	radix	2-1	2-2	2-3	2-4
16	8	4	2	1	.	1/2	1/4	1/8	1/16
1	0	1	0	0	.	0	0	0	1

 

20 1/16 = 10100.0001

 

 

7 1/4

 

22	21	20	radix	2-1	2-2
4	2	1	.	1/2	1/4
1	1	1	.	0	1

 

7 ¼ = 111.01

 

 

 

 

Binary Addition

 

10100.0001

 +    111.01

 0101011110

 

 

 

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

 

01001001010000010100110101011100

·       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 = \

01001001010000010100110101011100 = IAM\s