$4.$Write an assembly language program to do the following tasks using a single switch.

SW$-$ON $7-$Segment display displays number from $0$F

SW$-$OFF $7-$Segment display displays number from F$0$

data segment

array db $3$FH$,06$H$,5$BH$,4$FH$,66$H$,6$DH$,7$DH$,07$H$,7$FH$,6$FH

data ends

code segment

assume cs: code, ds:data

start:

mov ax$,$data

mov ds$,$ax

mov cx$,10$

mov si$,$ offset array

again:

mov al$,[$si$]$

mov dx$,378$h

out dx$,$al

call delay

inc si

loop again

jmp start

delay:

push cx

mov cx$,0$fh

up$1$:

push cx

mov cx$,0$fffh

up$2$:

nop

loop up$2$

pop cx

loop up$1$

pop cx

ret

code ends

end start