从键盘输入一个0–255之间的整数，在屏幕上显示出该整数对应的二进制和十六进制数。
DATA SEGMENT
MEG DB 'Please input a number(0~255):',0DH,0AH,'$'
ME2 DB 0DH,0AH,'Input a invalid number,exit!',0DH,0AH,'$'
X DB ?
Y DB 0AH
BUF DB 10
DB ?
DB 10 DUP(?)
BU2 DB '0','$'
DB 8 DUP(?)
DATA ENDS
CODE SEGMENT
ASSUME DS:DATA,CS:CODE
START: MOV AX,DATA
MOV DS,AX
MOV AH,09H
MOV DX,OFFSET MEG
INT 21H
MOV AH,0AH
MOV DX,OFFSET BUF
INT 21H
MOV DL,BUF[1]
CMP DL,3
JA ER
MOV DL,BUF[2]
CMP DL,0DH
JZ PD
CMP DL,'0'
JB ER
CMP DL,'9'
JA ER
SUB DL,'0'
MOV X,DL
MOV DL,BUF[3]
CMP DL,0DH
JZ PD
CMP DL,'0'
JB ER
CMP DL,'9'
JA ER
MOV AL,X
MUL Y
SUB DL,'0'
ADD AL,DL
MOV X,AL
MOV DL,BUF[4]
CMP DL,0DH
JZ PD
CMP DL,'0'
JB ER
CMP DL,'9'
JA ER
SUB DL,'0'
MOV AL,X
CMP AL,19H
JA ER
MUL Y
MOV BL,0FFH
SUB BL,DL
CMP AL,BL
JA ER
ADD AL,DL
MOV X,AL
PD: CMP X,0
JB ER
CMP X,255
JA ER
MOV AL,X
MOV Y,AL
CMP AL,0
JE XS
MOV BL,BUF[1]
MOV DI,BX
MOV BU2[DI],'$'
MOV BL,0AH
AND AX,00FFH
DIV BL
DEC DI
ADD AH,'0'
MOV BU2[DI],AH
MOV BL,AL
CMP BL,0
JE XS
MOV AL,BL
MOV BL,0AH
AND AX,00FFH
DIV BL
ADD AH,'0'
DEC DI
MOV BU2[DI],AH
MOV BL,AL
CMP BL,0
JE XS
DEC DI
MOV AL,BL
MOV BL,0AH
AND AX,00FFH
DIV BL
ADD AH,'0'
MOV BU2[DI],AH
XS: MOV AH,09H
MOV DX,OFFSET BU2
INT 21H
MOV AH,02H
MOV DL,'='
INT 21H
MOV CX,8
MOV AL,X
SEC: MOV AL,Y
MOV DI,CX
MOV CL,1
ROL AL,CL
MOV Y,AL
AND AL,01H
MOV DL,AL
MOV AH,02H
ADD DL,'0'
INT 21H
MOV CX,DI
LOOP SEC
MOV AH,02H
MOV DL,'B'
INT 21H
MOV AH,02H
MOV DL,'='
INT 21H
MOV DL,X
MOV CL,4
SHR DL,CL
OR DL,30H
CMP DL,39H
JBE AD1
ADD DL,7
AD1: MOV AH,2
INT 21H
MOV DL,X
AND DL,0FH
OR DL,30H
CMP DL,39H
JBE AD2
ADD DL,7
AD2: MOV AH,2
INT 21H
MOV AH,02H
MOV DL,'H'
INT 21H
MOV AH,4CH
INT 21H
ER: MOV AH,09H
MOV DX,OFFSET ME2
INT 21H
MOV AH,4CH
INT 21H
CODE ENDS
END START
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