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Re: Cascade interrupt

Subject: Re: Cascade interrupt
From: (Bruce Perens)
Date: Tue, 21 May 96 09:27 PDT
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.



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