On Sat, 31 Jul 1999 16:05:04 +0200 
 Manuel Bouyer <bouyer@antioche.lip6.fr> wrote:

 > You should really set PCIC_ISA_INTR_ALLOC_MASK to a more restrictive value.
 > One thing you can do is to boot win9x if you have it, and look at which IRQ
 > are used for what devices.

In fact, on the Inspiron 3500, you want to set it to 0x8000.  As far as
I can tell, that's the only interrupt that PCMCIA devices can use on
this laptop[*].

[*] I actually think that IRQ 14 might be usable, too.  But that happens to
be the "compatibility" interrupt on the PCI IDE controller.  I would like
to know if PCI IDE "compatibility" interrupts are really edge triggered
(like our code claims) or if they're actually level triggered (like other
PCI interrupts).  They would have to be level triggered in order for
PCMCIA devices to use them.

        -- Jason R. Thorpe <thorpej@nas.nasa.gov>