8086彙編--實時(延時)讀取並顯示BIOS時間
阿新 • • 發佈:2018-12-12
assume cs:code data segment FORMAT db 'YY/MM/DD HH:MM/SS',0dh,0ah,'$' ;si PRO db 9,8,7,4,2,0 ;di data ends code segment start: bg: mov ax,data mov ds,ax mov si,0 mov di,offset PRO mov cx,6 s0: push cx mov al,ds:[di] out 70h,al in al,71h mov ah,al mov cl,4 shr ah,cl and al,00001111B add ah,30h add al,30h inc di mov byte ptr ds:[si],ah mov byte ptr ds:[si+1],al add si,3 pop cx loop s0 jmp show show: mov ax,data mov ds,ax mov dx,0 mov cx,offset PRO-offset FORMAT mov ah,9 int 21h delay: MOV AX,09FH ;0000~0FFFFH REP2: MOV CX,5FFFH REP10MS: LOOP REP10MS DEC AX ;AX-1->AX CMP AX,0H JNE REP2 jmp bg code ends end start