ex1.asm

显示9-9乘法表和ASCII字符表（从20H--FFH） 基本功能 1 建立主菜单； 2分别显示9-9乘法表和ASCII字符表

public ex1
DATA SEGMENT 
INFO DB "PLEASE INPUT A CHAR:",13,10,"$" 
INFO2 DB 13,10,"THE ASCLL CODE IS(HEX) :",13,10,"$" 
DATA ENDS 

STACK SEGMENT 

STACK ENDS 

CODE SEGMENT 
ASSUME CS:CODE,DS:DATA,SS:STACK 
ex1 proc far

MOV AX,DATA 
MOV DS,AX 
MOV DX,OFFSET INFO 
MOV AH,9 
INT 21H 
MOV AH,1 
INT 21H 
PUSH AX 
MOV DX,OFFSET INFO2 
MOV AH,9 
INT 21H 
POP AX 
PUSH AX 
MOV CX,4 
ROR AL,CL 
MOV DL,AL 
AND DL,0FH 
CMP DL,10 
JB AGAIN 
ADD DL,7 
AGAIN:ADD DL,30H 
MOV AH,2 
INT 21H 
POP AX 
AND AL,0FH 
CMP AL,10 
JB OTHER 
ADD AL,7 
OTHER:ADD AL,30H 
MOV DL,AL 
MOV AH,2 
INT 21H 
MOV AH,4CH 
INT 21H
ex1 endp 
CODE ENDS 
END