0809.asm

微机原理——接口应用编程源码

STACK SEGMENT STACK
DW 64 DUP(?)
STACK ENDS
CODE SEGMENT
ASSUME CS:CODE
START: MOV DX,63H
       MOV AL,90H
       OUT DX,AL
D:  MOV DX,60H
   IN AL,DX
   AND AL,07H
   AND AH,00H
   CMP AX,06H
   JZ A
   CMP AX,05H
   JZ B
   CMP AX,03H
   JZ C
  JMP D
A:MOV DX,43H
  MOV AL,0B6H
  OUT DX,AL
  MOV DX,42H
  MOV AL,10H
  OUT DX,AL
  MOV AL,27H
  OUT DX,AL
B:  MOV DX,43H
   MOV  AL,0B7H
   OUT DX,AL
   MOV DX,42H
   MOV AL,0E8H
   OUT DX,AL
   MOV AL,07H
   OUT DX,AL
C: MOV DX,43H
   MOV AL,97H
   OUT DX,AL
   MOV DX,42H
   MOV AL,64H
   OUT DX,AL
CODE ENDS
      END START