求大神给个详细注释，看不懂。8086交通灯 -

标题: 求大神给个详细注释，看不懂。8086交通灯 [打印本页]

作者: 匿名 时间: 2017-12-23 13:30
标题: 求大神给个详细注释，看不懂。8086交通灯
CODE SEGMENT ;
      ASSUME CS:CODE
IOCON EQU 8006H
IOA    EQU 8000H
IOB    EQU 8002H
IOC    EQU 8004H
START: MOV AL,80H
MOV DX,IOCON
OUT DX,AL
MOV DX,IOB
MOV AL,0F0H
OUT DX,AL
MOV DX,IOC
MOV AL,0F0H
;MOV AL,0FH
OUT DX,AL
CALL DELAY1
IOLED0: MOV AL,10100101B;
MOV DX,IOC
OUT DX,AL
CALL DELAY1
CALL DELAY1
OR AL,0F0H  ;
;AND AL,10101111B;
OUT DX,AL
MOV CX,8
IOLED1: MOV DX,IOB
MOV AL,10101111B;

OUT DX,AL
CALL DELAY2
OR AL,01010000B;
OUT DX,AL
CALL DELAY2
LOOP IOLED1
MOV DX,IOC
MOV AL,0F0H ;
OUT DX,AL
CALL DELAY2
MOV AL,01011010B;
OUT DX,AL
CALL DELAY1
CALL DELAY1
OR AL,0F0H;
OUT DX,AL
MOV CX,8
IOLED2: MOV DX,IOB
AND AL,01011111B;
OUT DX,AL
CALL DELAY2
OR AL,10100000B;
OUT DX,AL
CALL DELAY2
LOOP IOLED2
MOV DX,IOC
MOV AL,0F0H ;
OUT DX,AL
CALL DELAY2
JMP IOLED0
DELAY1: PUSH AX
PUSH CX
MOV CX,0030H
DELY2: CALL DELAY2
LOOP DELY2
POP CX
POP AX
RET
DELAY2: PUSH CX
MOV CX,8000H
DELA1: LOOP DELA1
POP CX
RET
CODE ENDS
END START

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