1. KMUTT: S. Srakaew Instructions Can Be Divided into 3 Classes Data movement instructions  Move data from a memory location or register to another memory location or register without changing its form  Load—source is memory and destination is register  Store—source is register and destination is memory Arithmetic and logic (ALU) instructions  Change the form of one or more operands to produce a result stored in another location  Add, Sub, And Shift, etc. Branch instructions (control flow instructions)  Alter the normal flow of control from executing the next instruction in sequence  Jmp Loc, Jz Loc2,—unconditional or conditional branches

2. KMUTT: S. Srakaew Examples of Data Movement Instructions InstructionMeaning MOV AX,BX Move 16 bits from register BX to register AX MOV AL,[1234H] Load register AL with the byte content of the data segment memory address 1234H MOV BL,48 Copy 48 decimal(8-bit) (30H) into BL MOV EAX, 100Y Copy a 100 binary (32-bit) into EAX MOV AH, ‘A’Copy an ASCII ‘A’ (8-bit) into AH MOV AX, ‘AB’Copy an ASCII ‘BA’(16-bit) into AX

3. KMUTT: S. Srakaew Examples of ALU Instructions InstructionMeaning ADD AL, BLAL = AL + BL ADD BX, 2345HBX = BX + 2345H SUB DH, 2FHDH = DH - 2FH SUB ECX, data1Subtract the doubleword contents of the data segment memory location addressed by data1 from ECX MUL ECXEAX is multiplied by ECX; the unsigned product is in EDX-EAX

4. KMUTT: S. Srakaew Examples of Branch Instructions InstructionMeaning JMP Addr Jump to address Addr. JCXZ AddrJump to Addr if contents of register CX  0.

5. KMUTT: S. Srakaew Programming The 80x86 Addressing Modes

6. KMUTT: S. Srakaew Programming The 80x86 Register Addressing

7. KMUTT: S. Srakaew Programming The 80x86 Register Addressing: Example

8. KMUTT: S. Srakaew Programming The 80x86 Immediate Addressing

9. KMUTT: S. Srakaew Programming The 80x86 Direct Addressing

10. KMUTT: S. Srakaew Programming The 80x86 Direct Addressing

11. KMUTT: S. Srakaew Programming The 80x86 Direct Data Addressing

12. KMUTT: S. Srakaew Programming The 80x86 Direct Data Addressing: Example

13. KMUTT: S. Srakaew Programming The 80x86 Register Indirect Addressing

14. KMUTT: S. Srakaew Programming The 80x86 Register Indirect Addressing

15. KMUTT: S. Srakaew Programming The 80x86 Register Indirect Addressing: Example

16. KMUTT: S. Srakaew Programming The 80x86 Register Indirect Addressing

17. KMUTT: S. Srakaew Programming The 80x86 Base-Plus-Index Addressing

18. KMUTT: S. Srakaew Programming The 80x86 Base-Plus-Index Addressing

19. KMUTT: S. Srakaew Programming The 80x86 Base-Plus-Index Addressing: Array Structure

20. KMUTT: S. Srakaew Programming The 80x86 Base-Plus-Index Addressing: Array Structure

21. KMUTT: S. Srakaew Programming The 80x86 Register Relative Addressing

22. KMUTT: S. Srakaew Programming The 80x86 Register Relative Addressing

23. KMUTT: S. Srakaew Programming The 80x86 Array Structure Using Register Relative

24. KMUTT: S. Srakaew Programming The 80x86 Array Structure Using Register Relative

25. KMUTT: S. Srakaew Programming The 80x86 Base Relative-Plus-Index Addressing

26. KMUTT: S. Srakaew Programming The 80x86 Base Relative-Plus-Index Addressing

27. KMUTT: S. Srakaew Programming The 80x86 Base Relative-Plus-Index Addressing

28. KMUTT: S. Srakaew Programming The 80x86 Base Relative-Plus-Index Addressing

29. KMUTT: S. Srakaew Programming The 80x86 Scaled-Index Addressing

30. KMUTT: S. Srakaew Programming The 80x86 Scaled-Index Addressing

31. KMUTT: S. Srakaew Programming The 80x86 Direct Program Memory Addressing

32. KMUTT: S. Srakaew Programming The 80x86 Stack Memory Addressing: PUSH

33. KMUTT: S. Srakaew Programming The 80x86 Stack Memory Addressing: POP

34. KMUTT: S. Srakaew Programming The 80x86