Assembly Language Lecture 4

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],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],Motaz K. Saad, Dept. of CS

Assembly Language Lecture 4

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Assembly Language Lecture 4