进制转化：从键盘接收一个4位的十进制数，将它转化为16进制并输出

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;从键盘接收一个4位的十进制数，将它转化为16进制并输出
DATA SEGMENT
NUM  DW 0
CRLF   DB 0AH,0DH,24H
DATA ENDS

STACK SEGMENT PARA STACK
            DW 128 DUP(?)
TOP      LABEL WORD
STACK ENDS

CODE SEGMENT
           ASSUME CS:CODE,DS:DATA,SS:STACK
MAIN PROC FAR
START:
         MOV AX,DATA
MOV DS,AX
   
MOV AX,STACK
MOV SS,AX
LEA SP,TOP
   
MOV CX,4
L1: MOV AH,1
INT 21H
SUB AL,30H
CBW
MOV BX,10
PUSH AX
MOV AX,NUM
MUL BX
POP BX
ADD AX,BX
MOV NUM,AX
LOOP L1
PUSH AX


         MOV AH,9
         LEA DX,CRLF
         INT 21H  
     
         POP AX  
XOR CX,CX 
MOV BX,16
L2:    XOR DX,DX
DIV BX
PUSH DX
INC CX
CMP AX,0
JNZ L2
   
L5: POP DX
CMP DL,10
JB  L3
ADD DL,37H
JMP L4
L3:    ADD DL,30H
L4:    MOV AH,2
         INT 21H
LOOP L5
   
MOV AH,4CH
INT 21H
CODE ENDS
MAIN ENDP
           END START