assume ds:data,cs:code
data segment
db 'welcome to masm!'
data ends
code segment
start:mov ax,data
mov ds,ax
mov ax,0b878h
mov es,ax
mov bx,0
mov di,0
mov cx,16
s:mov ax,[di]
mov es:[bx+40h],ax
mov es:[bx+0e0h],ax
mov es:[bx+180h],ax
mov byte ptr es:[bx+41h],2h
...