Stumped

[Roger Heflin]

What does it look like the irq is doing?  I cannot think of too
many things that a car computer would be doing with an IRQ,
knock input maybe, car on, off, maybe, and probably watchdog.
I really don't think any would really need an irq except 
the watchdog.  

			Roger

On Thu, 1 Oct 1998, Mike Pitts wrote:

> 
> Does anyone know what triggers the IRQ interrupt in P4 PCM's?  
> 
> I've deciphered most of the loops in my PCM and how they are 
> scheduled (which is quite interesting BTW).  But there's some 
> code that's in the IRQ vector, but I can't figure out what 
> triggers the IRQ.  I assume it's tied to some external line, 
> but which one?
> 
> TIA,
> -Mike
> "Reverse engineering a 64k PCM is like eating an elephant, 
> one byte at a time." 
>