Assembly Language Programs (8086)

Semester 4: Understanding the Machine

This repository documents my journey into low-level programming through Assembly Language. It serves as a structured record of the concepts, instructions, and programming techniques I practiced while learning how software interacts directly with computer hardware.

📌 The Learning Journey

This roadmap was organized to progress from basic input/output operations to arrays, strings, symbolic constants, loops, stack operations, and memory manipulation. Each program focuses on a specific Assembly Language concept and its practical implementation.

No.	Topic	Core Focus
01	Print Single Character	Character Output using DOS Interrupts
02	Print Name Using Characters	Sequential Character Display
03	Take Input Character	Keyboard Input Handling
04	Add Two Numbers	Arithmetic Operations
05	Input and Add Two Numbers	User Input & Arithmetic
06	Convert Capital Letter to Small	ASCII Manipulation
07	Convert Small Letter to Capital	Character Conversion
08	Print 0 to 9 Using Loop	Loop Instructions
09	Print Strings	String Display using DOS Services
10	Print Capital A to Z	Character Sequences
11	Evaluate Expression	Arithmetic Expression Evaluation
12	Symbolic Constants	Constants & Array Initialization
13	Symbolic Names for String Literals	EQU Directive
14	Compare Two Numbers	Conditional Jumps
15	Print Array Using Loop	Arrays & Iteration
16	Input and Print String	String Input/Output
17	Swap Two Numbers Using XCHG	Register Exchange
18	Swap Two Numbers Using Stack	Stack Operations
19	Reverse String	String Manipulation
20	Print Pyramid Pattern	Nested Loops

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🛠 Tech Stack

• Language: Assembly Language (8086)
• Assembler: Turbo Assembler (TASM)
• Linker: Turbo Linker (TLINK)
• Environment: DOS / DOSBox
• Editor: Visual Studio Code

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🗂️ Repository Structure

assembly_language_programs/
├── 00_print_single_character.asm
├── 01_print_name_using_characters.asm
├── 02_take_input_character.asm
├── 03_add_two_numbers.asm
├── 04_sub_two_numbers.asm
├── 05_input_and_add_two_numbers.asm
├── 06_convert_capital_letter_to_small.asm
├── 07_convert_small_letter_to_capital.asm
├── 08_print_0_to_9_using_loop.asm
├── 09_print_strings.asm
├── 10_print_capital_A_to_Z.asm
├── 11_evaluate_expression.asm
├── 12_symbolic_constants.asm
├── 13_symbolic_name_for_string_literals.asm
├── 14_check_numbers_equal.asm
├── 15_print_array_using_loop.asm
├── 16_input_and_print_string.asm
├── 17_swap_two_numbers_using_xchg.asm
├── 18_swap_two_numbers_using_stack_operations.asm
├── 19_reverse_string.asm
├── 20_print_pyramid.asm
├── LICENSE
└── README.md

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💡 Learning Outcomes

Through these programs, I practiced:

• DOS Interrupt Services (INT 21H)
• Register Manipulation
• Arithmetic Instructions
• ASCII Character Operations
• Conditional and Unconditional Jumps
• Looping Mechanisms
• Arrays and Strings
• Symbolic Constants
• Procedures and Macros
• Stack Operations
• Memory Addressing

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🚀 How to Run

1. Open DOSBox.
2. Mount the project directory.

mount d c:\code
d:

3. Assemble the program.

tasm filename.asm

4. Link the object file.

tlink filename.obj

5. Execute the program.

filename.exe

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🎯 Academic Context

This repository is part of my 4th Semester Bachelor of Computer Science journey and represents my practical work in Assembly Language Programming, Computer Organization, and low-level system concepts.

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💬 Connect

Author: Sehrish Javed

GitHub: https://github.com/sehrishjaved19

LinkedIn: https://www.linkedin.com/in/sehrish-javed-119abc

Twitter (X): https://x.com/Sehrishjaved119

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