data segment

msg db "enter number$"

maxl db 100

actl db ?

num db 100 dup(0)

prime_nos db 100 dup('$')

data ends

mystack segment

dw 40 dup(0)

tos label word

mystack ends

code segment

assume cs: code, ds: data

start:

mov ax,data

mov ds,ax

mov ah,09h

lea dx,msg

int 21h

mov ah,0ah

lea dx,maxl

int 21h

lea bx,num

mov dh,0ah

cmp num,dh

jae go

mov dl,[bx]

and dl,0fh

jmp ahed

go:

push cx

push ax

mov dl,[bx]

mov cl,[bx+1]

sub dl,30h

sub cl,30h

mov ch,0ah

mov ah,00h

mov al,dl

mul ch

add al,cl

mov dl,al

pop ax

pop cx

ahed:

jz outer_loop

mov bx,offset prime_nos

outer_loop:

dec dl

cmp dl,01h

jz done

mov cl,dl

shr cl,01h

inner_loop:

cmp cl,01h

jz inner_loop_end

mov ah,00h

mov al,dl

div cl

cmp ah,00h

jz outer_loop

dec cl

jmp inner_loop

inner_loop_end:

mov dh,0ah

cmp dl,dh

jae go1

mov ah,dl

add ah,30h

mov [bx],ah

inc bx

jmp ahed1

go1:

push ax

push cx

mov ah,00h

mov al,dl

mov ch,0ah

div ch

add al,30h

mov [bx],al

inc bx

add ah,30h

mov [bx],ah

inc bx

pop cx

pop ax

ahed1:

jmp outer_loop

done:

mov ah,09h

lea dx,prime_nos

int 21h

mov ah,4ch

int 21h

code ends

end start