This PPT contain very basic knowledge of Assembly programming Language

5. MOV INSTRUCTION
D S
MOV A, #55H
MOV R0,A
MOV A,#9
In MOV (MOVE) instruction the data is moved from
Source(S) to Destination(D).
# (Pound sign shows immediate value)

6. ADD INSTRUCTION
MOV R0,#25H
MOV A,#25H
ADD R0,A // Error
ADD A,R0
If we want to perform any Arithmetic Operation than we have to use
Accumulator (A) Register. Result will be stored in Destination(D) so,
Accumulator will we at the destination place only otherwise it will give the error.

7. Now you will see three back to back
program and you will understand the
way how to reduce the number of
steps but you will get the same
answer.

8. MOV R5,#25H
MOV R7,#26H
MOV A,#0
ADD A,R5
ADD A,R7

9. MOV A,#25H
MOV R7,#26H
ADD A,R7

10. MOV A,#25H
ADD A,#26H

12. ORG 0H // Starting of the program
(Body of the Program)
END // End of the program

13. ORG 0H
MOV R5,#30H
MOV R7,#20H
MOV A,#0
ADD A,R5
ADD A,R7
ADD A,#10H
END

14. LOOP
Repeating a sequence of instruction a
Certain number of times.

15. ORG 0H MOV A,#0
MOV R2,#10
ADD A,#03AGAIN:
DJNZ R2,AGAIN
MOV R5,A
END

16. Conditional Jump

17. ORG 0H MOV A,R5
JNZ NEXT
MOV R5,#55H
….NEXT :

18. Addressing Modes:
• Immediate
• Register
• Direct
• Register indirect

19. Immediate
MOV A,#25H
MOV R4,#62
MOV B,#40H
Notice that the immediate data
must be preceded by the sign, ”#”

20. Register
MOV A,R0
MOV R2,A
ADD A,R5

21. Direct

22. Register indirect
R0-R1 are used
R2-R7 are not used.