05a.asm

录音子程序 mov dx,offset news_2 显示放音提示

DATA SEGMENT
ORG 1000H
BUF DB 1H,2H,3H,4H,9H,5H,6H,0EH,8H,7H
ORG 1020H
MAX DB 1 DUP(?)
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

    CALL CHAMAX
    CALL HEX2ASCII

    MOV DL,AL
    MOV AH,2
    INT 21H

;==============================
    RET
START ENDP

CHAMAX PROC NEAR

    MOV SI,OFFSET BUF
    MOV AL,[SI]
    MOV CX,9
    INC SI

F0: CMP AL,[SI]
    JGE F1
    MOV AL,[SI]
F1: INC SI
    LOOP F0

    MOV DI,OFFSET MAX
    MOV [DI],AL

    RET
CHAMAX ENDP

HEX2ASCII PROC NEAR
    CLC           ;16进制转ASCII子程序
    DAA
    ADD AL,0F0H
    ADC AL,40H
    RET
HEX2ASCII ENDP


CODE ENDS
END STT