Introduction to Computer Organization and Assembly Language

1. Introduction to Computer Organization and Assembly Language Sheet 4 By: Nora Alaqeel

2. Unconditional Jumps – JMP Instruction JMPdestination_lable

3. Conditional Jumps – Signed Jumps

4. Conditional Jumps – Unsigned Jumps

5. Conditional Jumps – Single Flag Jumps

6. CMP Instruction CMPdestination, source Just like SUB but the destination does not change. Changes the Flags. Used with conditional jumps.

7. Example – IF, THEN, ELSE • Suppose AL and BL contain extended ASCII characters,Display the one that comes first in the character sequence

8. Example – AND condition Read a character, and if it’s an uppercase letter, Accept it

9. Example – OR Condition • Read a character. If it’s 'y' or 'Y', display it; otherwise, terminate the program.

10. LOOP Instruction LOOPdestination_Label • Display a row of 80 stars.

11. Example – While Loop Count number of characters entered and terminate if carriage return is entered.

12. Example – Repeat Loop Read characters until a blank is read terminate.