恩,好 .有错误请修改哦!
dseg segment
coname db 'space explorers inc.'
dseg ends
eseg segment
prline db 20 dup(' ')
eseg ends
cseg segment
assume cs:cseg,ds:dseg ,es:eseg
start: mov ax,dseg
mov ds,ax
mov ax,eseg
mov es,ax
lea ax,coname
add ax,20
lea si,ax
lea di,prline
mov cx,20
std
rep movsb
ret
cseg ends
end start

.model small
.386
option casemap:none

data segment
coname db 'space explorers inc.'
prline db 20 dup(?)
data ends

code segment
assume cs:code,ds:data
start: mov ax,data
mov ds,ax
mov bx,offset coname
add bx,20
mov cl,20
mov dx,offset prline
sign:
mov dx,bx
inc dx
dec bx
loop sign

mov dx,offset prline
mov ah,09h
int 21h
mov ax,4c00h
int 21h
code ends
end start

刚刚写了个16位的，手头没工具，不知道对不对？

我昨天是在无硬盘网吧，你来帮我下？

.model small
.386
option casemap:none

data segment
coname db 'space explorers inc.'
prline db 20 dup(?)
data ends

code segment
assume cs:code,ds:data
start: mov ax,data
mov ds,ax
mov bx,offset prline
mov si,bx
mov cx,20
ll: dec si
mov al,[si]
mov [bx],al
inc bx
loop ll
mov dx,offset prline
mov ah,09h
int 21h
mov ax,4c00h
int 21h
code ends
end start