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From: rb@ccird2.UUCP
Newsgroups: net.micro.pc
Subject: Re: 8259 PIC
Message-ID: <774@ccird2.UUCP>
Date: Thu, 17-Apr-86 19:07:38 EST
Article-I.D.: ccird2.774
Posted: Thu Apr 17 19:07:38 1986
Date-Received: Mon, 21-Apr-86 04:33:24 EST
References: <84@uscvax.UUCP>
Reply-To: rb@ccird2.UUCP (Rex Ballard)
Distribution: net
Organization: CCI Telephony Systems Group,  Roch, NY
Lines: 14
Summary: Check the Intel Hardware manual

In article <84@uscvax.UUCP> nadji@uscvax.UUCP (Behzad Nadji) writes:
>"One can send a EOI to 8259 PIC by writing a 20H into port 20H."
>
>Where can I get more detail on this?
>

Check the various Intel hardware guides.  My 1978 manual lists it
as a preliminary product :-). (I really should get some new ones :-).

There are all kinds of perverse things you can do like change vector
addresses, disable different devices, assign priorities, and so on.

I don't know what specific interrupts are connected to what devices,
but it shouldn't be too hard to figure out.