8254调试代码CODE SEGMENT ASSUME CS:CODE,DS:DATA MOV DX,INTCSR_BYTE1 MOV AL,1FH OUT DX,AL MOV DX,INTCSR_BYTE2 MOV AL,3FH OUT DX,AL MOV DX,INTCSR_BYTE3 MOV AL,00H OUT DX,AL-code of 8254CODE SEGMENT ASSUME CS:CODE,DS:D