（1）

（2）

 

（3）汇编代码如下

assume cs:code,ds:data,es:table

data segment

db 'welcome to masm!'

data ends

table segment

dw 4000 dup (0)

table ends

code segment

start: mov ax,data

mov ds,ax

mov ax,0b800h

mov es,ax

mov bx,0

mov si,0

mov cx,16

s0: mov ax,[bx]

mov es:[bx+720h][si],ax

mov al,2

mov es:[bx+721h][si],al

inc bx

inc si

loop s0

mov bx,0

mov cx,16

mov si,160

s1: mov ax,[bx]

mov es:[bx+720h][si],ax

mov al,36

mov es:[bx+721h][si],al

inc bx

inc si

loop s1

mov bx,0

mov cx,16

mov si,320

s2: mov ax,[bx]

mov es:[bx+720h][si],ax

mov al,113

mov es:[bx+721h][si],al

inc bx

inc si

loop s2

mov ax,4c00h

int 21h

code ends

end start