11a.asm

来自「录音子程序 mov dx,offset news_2 显示放音提示」· 汇编 代码 · 共 38 行

DATA SEGMENT

    ioport equ 0c000h-280h              ;实验箱驱动默认中断地址为C000H，此处设置偏移量
    ioport1 equ ioport+290h

DATA ENDS

CODE SEGMENT
ASSUME CS:CODE,DS:DATA
START PROC FAR
STT:PUSH DS
    SUB AX,AX
    PUSH AX
;==============================
    MOV AX,DATA
    MOV DS,AX

    MOV CL,0

CONTROL:MOV DX,ioport1
    MOV AL,CL
    OUT DX,AL
    ADD CL,20
;==============================
    MOV AH,0BH
    INT 21H
    CMP AL,00H
    JNE EXIT
    JMP CONTROL

EXIT:MOV AH,4CH
    INT 21H
;==============================
    RET
START ENDP
CODE ENDS
END STT