assume cs:code,ds:data,ss:stack

data segment
    db 'welcome to masm!'
    db 00000010B
    db 00100100B
    db 01110001B
data ends 

stack segment stack
        db    128 dup (0)
stack ends 

code segment
        start:mov ax,stack
              mov ss,ax
              mov sp,128

              mov bx,data
              mov ds,bx 
              
              mov bx,0B800H
              mov es,bx 

              mov si,0
              mov di,160*10+30*2
              mov bx,16
              mov dx,0 
              
              mov cx,3

masm:          push bx
              push cx
              push si
              push di

              mov cx,16
              mov dh,ds:[bx] ;mov es:[di],dx   mov es:[di+0],dl es:[di+1],dh     

showRow:      mov dl,ds:[si]    
              mov es:[di],dx
              add di,2
              inc si 
              loop showRow

              pop di 
              pop si
              pop cx
              pop bx
              add di,160
              inc bx
              loop masm



              mov ax,4C00H
              int 21H


code ends 

end start