不错的！软件小！IOPORT EQU 0EC00H-0280H
IO8253_0 EQU IOPORT+280H
IO8253_1 EQU IOPORT+281H
IO8253_C EQU IOPORT+283H
code segment
assume cs:code
main:
MOV AL,00110101B
MOV DX,IO8253_C
OUT DX,AL
MOV AL,00H
MOV DX,IO8253_0
OUT DX,AL
MOV AL,10H
OUT DX,AL
MOV AL,01110111B
MOV DX,IO8253_C
OUT DX,AL
MOV AL,00H
MOV DX,IO8253_1
OUT DX,AL
MOV AL,10H
OUT DX,AL
;LOOP:MOV AH,1
; INT 16H
; JE LOOP
MOV AH,4CH
INT 21H
CODE ENDS
END MAIN
