RE: spurious 8259A interrupt

[Maciej W. Rozycki]

On Mon, 22 Mar 2004, Richard B. Johnson wrote:

> Yes. The interrupt status, above, clearly shows that the XT-PIC is
> being used for timer interrupts. The local APIC timer is being used
> instead of the PIT (Programmable Interval Timer at port 0x40,

 The local APIC timer is never used "instead" of the PIT.  If both timers
are available, they are used independently for different puproses.

> channel 0).  The IO-APIC contains, several timers as well as a
> programmable interrupt controller and router, etc. You are not
> using its interrupt controller, but you are using its timer,
> best I can see.

 There is no timer source in any I/O APIC I know of.

-- 
+  Maciej W. Rozycki, Technical University of Gdansk, Poland   +
+--------------------------------------------------------------+
+        e-mail: macro@xxxxxxxxxxxxx, PGP key available        +
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