实现代码：

assume cs:codesg,ss:stacksg,ds:datasg

stacksg segment
	dw 0,0,0,0,0,0,0,0
stacksg ends

datasg segment
	db '1. display      '
	db '2. brows        '
	db '3. replace      '
	db '4. modify       '
datasg ends

codesg segment
	start: mov ax,datasg
		   mov ds,ax
		   mov bx,0			;行

		   mov ax,stacksg
		   mov ss,ax
		   mov sp,10h		;初始化堆栈

		   mov cx,4

		s0:push cx			;入栈
		   mov si,0			;初始化列
		   mov cx,4
		   
		 s:mov al,[bx+si+3]
		   and al,11011111B
		   mov [bx+si+3],al
		   inc si
		   loop s

		   add bx,16		;下一行
		   pop cx
		   loop s0

		mov ax,4c00h
		int 21h
codesg ends
end start

调试

输入

结果