>>  I don't understand how to call the interrupt routine...
>=20
> *You* never do. It is "called" automaticly by the interrupt
> hardware logic whenever an interrupt condition occures.

Which is of course why, Richard, it's called an interrupt :-))

Don't forget to add the context saving, as generally you can be
in some random place executing any other code when the ISR
is entered, and retaining the values of W and Status is more than
likely important to the code you return to after the ISR

Joe
--=20
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