微機原理彙編程式碼
STACK1 SEGMENT STACK
DW 256 DUP(?)
STACK1 ENDS
DATA SEGMENT
MES DB 'su tie sen',0AH,0DH,0AH,0DH,'$'
MES1 DB 'Show a as hex:',0AH,0DH,'$'
SD DB 'a'
DATA ENDS
CODE SEGMENT
ASSUME CS:CODE,DS:DATA
START: MOV AX,DATA
MOV DS,AX
MOV DX,OFFSET MES
MOV AH,09H
INT 21H
MOV DX,OFFSET MES1
MOV AH,09H
INT 21H
MOV SI,OFFSET SD
MOV AL,DS:[SI]
AND AL,0F0H
MOV CL,4
SHR AL,CL
CMP AL,0AH
JB C2
ADD AL,07H
C2: ADD AL,30H
MOV DL,AL
MOV AH,02H
INT 21H
MOV AL,DS:[SI]
AND AL,0FH
CMP AL,0AH
JB C3
ADD AL,07H
C3: ADD AL,30H
MOV DL,AL
MOV AH,02H
INT 21H
KEY: MOV AH,1
INT 16H
JZ KEY
MOV AX,4C00H
INT 21H
CODE ENDS
END START