[PReP][PATCH] Fix ISA PIC interrupt acknowledge address detection

[Hollis Blanchard]

On Sep 16, 2004, at 1:25 PM, Leigh Brown wrote:

> The ISA PIC address for acknowledging interrupts is actually defined
> in residual data as a 32-bit system address, rather than a 32-bit
> memory address.  This is rather embarrasing, as I don't think this
> function has done the right thing, ever.
>
> Tested and working fine on my Carolina and 140.

And this is important, as 2.6.9-rcX suffer from the dreaded Carolina 
"lost interrupt" problems. Could we try to get this patch into 2.6.9 
final?

-Hollis