This document discusses assembly language and its relationship to microprocessors. It notes that assembly language works directly with microprocessors, is a low-level language, and is the final product of compiler translations from high-level languages. It provides examples of assembly language programming processes like register addressing and memory addressing. Important concepts like interrupts and input/output functions are also summarized.

1. Assembly Language And
Microprocessor
Online Class-3.
Md. Atiqur Rahman (Guest Lecturer )
Habibullah Bahar University collage

3. Assembly Language
• It is low level language.
• It work direct with the microprocessor.
• It is the final product that is produced by every compiler.

4. Example: 2

6. Example

7. Advance and Comparison with high level
language
• Performance and accuracy better than high level .
• Assembly can communicate better than high level.
• We can use assembly language to direct read pointer at physical address.
• And can control the machine code better …

9. Create, run an assembly language program
• Create the source program .
• Assembler the program .
• Link the program.
• Run the program.

11. Type of Register

12. Programing process :
• Register Address: Both Operands are register like as : Reg, Reg.
i.e. Mov bx,dx
• Immediate Register: one Operands and constant term: i.e mov ax, value
• Memory Addressing: access static data directly . i.e reg, [30h]

13. Important parts for programing
• 1= input a character with echo.
• 2=output/print a single character.
• 8= input a character without echo.
• 9= print of string ..
• 4ch for Exit

14. Interrupt
• Stop the current program and allow microprocessor to access hardware to
take input or given output .
• INT 21h= interrupt for text handling.
For input : Mov ah, 1 for output: Mov ah,2
Int 21h int 21h

15. Thanks