DATA SEGMENT
        A DB 10H
        B DB 20H
        MSG1 DB 10,13,"BOTH A AND B ARE EQUAL$"
        MSG2 DB 10,13,"A IS GREATER THAN B$"
        MSG3 DB 10,13,"B IS GREATER THAN A$"

DATA ENDS

CODE SEGMENT
        ASSUME CS:CODE,DS:DATA
        START:
                MOV AX,DATA
                MOV DS,AX

                MOV AL,A
                CMP AL,B
                JZ LAB1
                JA LAB2
                MOV AH,09H
                LEA DX,MSG3
                INT 21H
                JMP END1
        LAB1:
                MOV AH,09H
                LEA DX,MSG1
                INT 21H
                JMP END1
        LAB2:
                MOV AH,09H
                LEA DX,MSG2
                INT 21H
                JMP END1
                
         END1:   MOV AX,4C00H
                INT 21H

CODE ENDS
        END START


OUTPUT
***********

D:\tasm\tasm1>K

B IS GREATER THAN A