proteus8086 8255开关控制流水灯
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2012-12-21
21:03:14
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CODE SEGMENT
ASSUME CS:CODE
START:
JMP TZ0
TZ0:
AD DB 80H
MOV AH,00FAH
MOV AL,0001H
MOV BX,01H
MOV DX,94H
IN AL,DX
TEST AL,01H
JZ HUA
IN AL,DX
TEST AL,02H
JZ HUA1
IN AL,DX
TEST AL,04H
JZ HUA2
IN AL,DX
TEST AL,08H
JZ HUA3
MOV AL,01H
JMP TZ0
HUA:
MOV DX,00H
OUT DX,AL
MOV CX,9F20H
LOOP $
ROL AL,1
TEST AL,1000B
JZ TZ0
JMP HUA
HUA1:
MOV AL,AD
OUT DX,AL
MOV CX,9F20H
LOOP $
ROR AL,1
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