assume cs:a
data segment
db 'Welcome to masm!',0
data ends
a segment
start:
mov dh,8
mov dl,3
mov cl,2
mov ax,data
mov ds,ax
mov si,0
call show_str
mov ax,4c00h
int 21h
nop
show_str:
push dx
push si
push cx
push es
mov ax,0b...