Addition of two 16 bits numbers without carry Microprocessor

PROGRAM NO.1

OBJECT: Write a program to add two 16 bit hexadecimal numbers without carry.
INSTRUMENT REQUIRED: 8086 Microprocessor Trainer Kit.
PROGRAM:

MEMORY LOCATION	MACHINE CODE	OPCODE	OPERAND
0206	BE0002	MOV	SI,0200H
0209	8B04	MOV	AX,[SI]
020B	46	INC	SI
020C	46	INC	SI
020D	8B1C	MOV	BX,[SI]
020F	03C3	ADD	AX,BX
0211	BF0402	MOV	DI,0204H
0214	8905	MOV	[DI],AX
0216	F4	HLT

DESCRIPTION:

To solve the given objective, we have taken two hexadecimal numbers in the memory locations of 0200H and 0202H and added them and stored the result in the memory location of 0204H.
To solve the given objective, we have taken the following steps:

Move the source index register (SI) pointer to the location of the first number.
Store the first number in the AX register using SI.
Double increment the SI pointer to point to the memory location of the second number.
Store the second number in the BX register using SI.
Now apply ADD operation to add the numbers in the registers AX and BX and store the result in AX.
Move the destination index (DI) pointer to point to the memory location where the
result is to be stored.
Finally move the result from the AX register to the destination using DI 8. HLT to Halt or End the program.

INPUT VALUE

MEMORY LOCATION	VALUE
0200H	10
0201H	3A
0202H	1C
0203H	2B
0204H	00
0205H	00

OUTPUT

MEMORY LOCATION	VALUE
0204H	2C
0205H	65

RESULT: The addition of the two hexadecimal numbers 3A1CH and 2B1CH yielded 652CH

COMMENTS:

1. MOV SI, 0200H: 16 bit data can be moved using immediate addressing . 0200 is moved to source index.

2. ADD AX, BX: contents in the accumulator and the base register are added.

3. INC SI: The content of a specified 8-bit or 16-bit register or memory location(s) is incremented by one by this instruction.

4. HLT: This instruction stops program execution. The processor stops fetching and executing instructions.

FLOWCHART:

Addition of two 16 bits numbers without carry using 8086 Microprocessor

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Microprocessor Lab Manual

Computer Organization & Microprocessor Lab Manual

Most Important Question for Exam

1. Which is the Microprocesor comprises?

A) Register Section

B) One or more ALU

C) All of these

D) Control Unit

Answer is C)
All of these

2. There are Primarly two types of register?

A) General Purpose Register

B) Dedicated Register

C) None of these

D) A and B

Answer is D)
A and B

3. What is the store by register?

A) Operands

B) Memory Konvid

C) None of these

D) Data

Answer is D)
Data

4. Name of typical dedicated register is:

A) PC

B) IR

C) All of these

D) SP

Answer is C)
All of these

5. Accumulator based Microprocessor example are:

A) Intel 8085

B) Motorola 6809

C) None of these

D) A and B

Answer is D)
A and B

6. BCD Stand for:

A) None of these

B) Both A & B

C) Binary coded decoded

D) Binary coded decimal

Answer is D)
Binary codec decimal

7. A set of register which contain are:

A) All of these

B) Result

C) Memory Address

D) Data

Answer is A)
All of these

8. Which is used to store critical pieces of data during subroutines and interrupts:

A) Data register

B) Accumulator

C) Queue

D) Stack

Answer is D)
Stack

9. The Data in the stack is called:

A) None of these

B) Pulling

C) Pushed

D) Pushing Data

Answer is D)
Pushing Data

10. The external system bus architecture is created ursing from _______ architecture:

A) Von Neumann

B) Charles Babbage

C) Dennis Ritchie

D) Pascal

Answer is A)
Von Neumann

11. The Processor 80386/80486 and the Pentium Processor uses _______ bits address bus:

A) 64

B) 36

C) 32

D) 16

Answer is C)
32

12. Which is not the control bus signal:

A) None of these

B) RESET

C) WRITE

D) READ

Answer is B)
RESET

13. PROM Stand for:

A) None of these

B) Programmable read-only memory

C) Programmable read write memory

D) Programmer read and write memory

Answer is B)
Programmable read-only memory

14. EPROM Stand for

A) None of these

B) Electrically Programmable read only memory

C) Electrically Programmable read write memory

D) Erasable Programmable read only memory

Answer is D)
Erasable Programmable read only memory

15. Each memory location has:

A) Both B & C

B) Address

C) Contents

D) None of these

Answer is A)
Both B & C

16. Which is the type of Microcomputer memory:

A) Primary memory

B) Processor memory

C) All of these

D) Secondry Memory

Answer is C)
All of these

17. Secondary memory can store________

A) Compiler

B) All of these

C) Program store code

D) Operating System

Answer is B)
All of these

18. Secondary memory is also called_______:

A) Both B & C

B) Auxiliary

C) Backup Store

D) None of these

Answer is C)
Both B & C

19. Customized ROMS are called:

A) Flash ROM

B) Mask ROM

C) EPROM

D) None of these

Answer is B)
Mask ROM

20. The RAM which is crated using bipolar transistors is called:

A) Dynamic RAM

B) Permanent RAM

C) Static RAM

D) DDR RAM

Answer is C)
Static RAM

21. Which type of RAM needs regular reffered:

A) Static RAM

B) Dynamic RAM

C) Permanent RAM

D) SD RAM

Answer is B)
Dynamic RAM

22. Which RAM is created using MOS transistor:

A) Permanent RAM

B) Static RAM

C) SD RAM

D) Dynamic RAM

Answer is D)
Dynamic RAM

23. A Microprocessor retries instruction from:

A) Cache Memory

B) Control Memory

C) Virtual Memory

D) Main Memory

Answer is D)
Main Memory

24. The lower red curvy arrow show the CPU places the address extracted from the memory location _______.

A) System Bus

B) Address Bus

C) Data Bus

D) Control Bus

Answer is B)
Address Bus

25. The CPU send out a _____ signal to indicate the valid data is available on the data bus:

A) Write

B) Read

C) Both A & B

D) None of these

Answer is A)
Write

26. The CPU moves the _______ signal to complete the memory write operation:

A) Write

B) Read

C) Both A & B

D) None of these

Answer is B)
Read

27. BIU Stand for:

A) Bess interface unit

B) Bus interface unit

C) Both A & B

D) None of these

Answer is B)
Bus interface unit

28. EU Stand for:

A) Excahnge unit

B) Execution unit

C) Execute unit

D) None of these

Answer is B)
Execution unit

29. Which are the four categories of registers:

A) Other register

B) Pointer or Index register

C) All of these

D) Segment register

Answer is C)
All of these

30. Eight of register are known ar:

A) Other register

B) Segment register

C) General-purpose register

D) Pointer or index register

Answer is C)
General-purpose register

PROGRAM NO.1

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