Re: Cascade interrupt

[bruce@pixar.com (Bruce Perens)]

The 8259 has _three_ cascade inputs (0, 1, and 2) and a slave-master input
pin according to the "Microsoft Programmer's PC Sourcebook". Unfortunately,
they don't give the register description :-( . Thus, I think it might be at
least possible for a cascade interrupt to come up on another IRQ than 2 if
someone wires it that way.

Who is Intel's second-source for this chip? If you search for *8259* on
other manufacturers WWW pages (TI, Motorola, etc.) you might find it.

        Thanks

        Bruce