8259-Problem(My ISR is not called)

[Adek336]

perhaps you pop in he wrong order:

push es
push ds

pop es
pop ds

or you don't have enough stack space

[Pype.Clicker]

perhaps you pop in he wrong order:

push es
push ds

pop es
pop ds

or you don't have enough stack space

silliest suggestion ever heard. Have you ever read about stacks and LIFO (last in first out) model ?? the last thing you PUSH is the first you'll POP.