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. repalce '
db '4. modify '
datasg ends
codesg segment
start: mov ax, stacksg
mov ss, ax
mov sp, 16
mov ax, datasg
mov ds, ax
mov bx, 3
mov cx, 4
s0: push cx
mov si, 0
mov cx, 4
s: mov al, [bx+si]
and al, 11011111
mov [bx+si], al
inc si
loop s
add bx, 16
pop cx
loop s0
mov ax, 4c00h
int 21h
coedsg ends
end start