1 assume cs:code 2 code segment 3 start: 4 mov ax,cs 5 mov ds,ax 6 mov si,offset do0 7 8 mov ax,0 9 mov es,ax 10 mov di,200h 11 12 mov cx,offset do0end-offset do0 13 cld 14 rep movsb 15 16 mov ax,0 17 mov ds,ax 18 mov word ptr ds:[0],200H 19 mov word ptr ds:[2],0H 20 21 mov ax,4c00h 22 int 21h 23 24 do0: 25 jmp short do1 26 db "divide error" 27 do1: 28 mov ax,cs 29 mov ds,ax 30 mov si,202H 31 32 mov ax,0b800H 33 mov es,ax 34 mov di,12*160+16*2 35 36 mov cx,13 37 s: mov al,[si] 38 mov es:[di],al 39 mov byte ptr es:[di+1],02H 40 inc si 41 add di,2 42 loop s 43 44 mov ax,4c00h 45 int 21h 46 47 do0end: 48 nop 49 50 code ends 51 end start
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