----------
From:   Mike Smith
Sent:   Wednesday, 8 October 1997 22:16
To:     PICLIST@MITVMA.MIT.EDU
Subject:        Re: More ISA bus questions [OT] = IRQ usage on PC "tutorial".


<major snip>

> >  4) The nature of the 8259 Programmable Interrupt Controller. You need
> >the datasheets to understand how it works, so get them (and even then
> >it's a bit of a mystery), but in short, each input trips an edge-

> I've got a kacky old Intel book with it somewhere - do you know if intel
> ever released it in pdf form?

I don't think Intel released it as a pdf file.  :-(

However, Harris Semiconductor have one on their 82C59A.  This may be useful.  It
 can be found at:

http://www.semi.harris.com/data/fn/fn2/fn2784/index.htm


Mark Thatcher