p124.asm

assume cs:code

; 用div 计算 data 段中，第一个数据除以第二个数据，商存第三个存储单元中
data segment
  dd      100001
  dw      100
  dw      0
data ends

stack segment stack
  dw 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
stack ends

code segment
start:
  mov ax, data
  mov ds, ax

  ; for div, high => dx, low => ax
  mov ax, ds:[0]
  mov dx, ds:[2]
  div word ptr ds:[4]
  mov ds:[6], ax

  mov ax, 4c00h
  int 21h

code ends

end start