Re: [Qemu-devel] [PATCH 1/2] KVM: fix i8259 interrupt high to low transition logic

[Maciej W. Rozycki]

On Thu, 13 Sep 2012, Jan Kiszka wrote:

> > I've also just skimmed parts of the 8254 section of "The Indispensable PC
> > Hardware Book", by Hans-Peter Messmer, Copyright 1994 Addison-Wesley,
> > although I probably ought to read it more carefully.
> 
> http://download.intel.com/design/archives/periphrl/docs/23124406.pdf
> should be the primary reference - as long as it leaves no open questions.

 Oh, I'm glad they've put it online after all, so there's an ultimate 
place to refer to.  I've only got a copy of this datasheet I got from 
Intel on a CD some 15 years ago.

 And for the record -- they used to publish the 8259A datasheet as well, 
but it appears to have gone from its place.  However it can be easily 
tracked down by an Internet search engine of your choice by referring to 
its order # as 231468.pdf (no revision number embedded there in the file 
name as there was none as it was originally published either).

  Maciej