.model tiny
assume cs:mycode
assume ds:mydata
assume ss:mystack

mydata segment
; <Ob'yavleniya peremennyh i strok>
mydata ends

mycode segment
; Polzovatelskii obrabotchik preryvaniya
myhandler:
sti
; <Kod obrabotchika preryvaniya v sootvetstvii s zadaniem>
mov al, 20h
out 20h, al
iret

; Tochka vhoda v programmu
mystart:
mov ax, mydata
mov ds, ax
mov ax, 0
mov es, ax
mov ax, mystack
mov ss, ax
mov sp, 0

; <Kod osnovnoi programmi v sootvetstvii s zadaniem>

; Vyhod v DOS
mov ax, 4C00h
int 21h
mycode ends

.stack
mystack segment
db 1000 dup(?) ; razmer steka 1000 bait
mystack ends

end mystart