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Assembly Language Lecture 4

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Motaz Saad
Motaz Saad

The document discusses fundamentals of assembly language including data types, operands, data transfer instructions like MOV, arithmetic instructions like ADD and SUB, and addressing modes. It provides examples of assembly language code to perform operations like copying a string, converting between Celsius and Fahrenheit, and using various addressing modes.

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Assembly Language Fundamentals of Assembly language Motaz K. Saad Spring 2007 Motaz K. Saad, Dept. of CS
Review of existing concepts ,[object Object],[object Object],[object Object],[object Object],Motaz K. Saad, Dept. of CS
Operand Types ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Motaz K. Saad, Dept. of CS
Data transfer instructions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Motaz K. Saad, Dept. of CS
MOV Instruction .data count DB 100 wVal DW 2 .code mov bl,count mov ax,wVal mov count,al mov al,wVal ; error mov ax,count ; error mov eax,count ; error ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Motaz K. Saad, Dept. of CS
[object Object],[object Object],[object Object],[object Object],LEA instruction Motaz K. Saad, Dept. of CS
Arithmetic instructions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Motaz K. Saad, Dept. of CS
Arithmetic instructions ,[object Object],[object Object],[object Object],[object Object],[object Object],Motaz K. Saad, Dept. of CS
Arithmetic instructions ,[object Object],[object Object],[object Object],[object Object],[object Object],Motaz K. Saad, Dept. of CS
Arithmetic instructions ,[object Object],[object Object],Motaz K. Saad, Dept. of CS
Arithmetic instructions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Motaz K. Saad, Dept. of CS
Arithmetic instructions ,[object Object],[object Object],[object Object],[object Object],Motaz K. Saad, Dept. of CS
Arithmetic instructions ,[object Object],[object Object],[object Object],[object Object],Motaz K. Saad, Dept. of CS
[object Object],[object Object],[object Object],[object Object],[object Object],Practice Motaz K. Saad, Dept. of CS
Repetitive move instructions copying a string to another TITLE A04ASM1 (EXE) Move and add operations ; --------------------------------------------- .STACK ; ---------------------------------------------- .DATA STRING1 DB "12345678","$" STRING2 DB ? Motaz K. Saad, Dept. of CS
Repetitive move instructions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Motaz K. Saad, Dept. of CS
Repetitive move instructions ,[object Object],[object Object],[object Object],[object Object],Motaz K. Saad, Dept. of CS
Practice ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Motaz K. Saad, Dept. of CS
Addressing mode ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Motaz K. Saad, Dept. of CS
Addressing mode ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Motaz K. Saad, Dept. of CS
Addressing mode ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Motaz K. Saad, Dept. of CS
Addressing mode ,[object Object],[object Object],[object Object],Motaz K. Saad, Dept. of CS

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Assembly Language Lecture 4

  • 1. Assembly Language Fundamentals of Assembly language Motaz K. Saad Spring 2007 Motaz K. Saad, Dept. of CS
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  • 15. Repetitive move instructions copying a string to another TITLE A04ASM1 (EXE) Move and add operations ; --------------------------------------------- .STACK ; ---------------------------------------------- .DATA STRING1 DB "12345678","$" STRING2 DB ? Motaz K. Saad, Dept. of CS
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