[Asterisk-Users] PCI Master Abort

[Leo Ann Boon]

A general tip:
- use APIC even on a single processor system

APIC (Advanced Programmable Interrupt Controller?) or more specifically 
IO-APIC, is a feature on newer motherboards (>=2000) that allows the OS 
to allocate more than 15 IRQs. Windows XP depends on this feature to 
solve the IRQ sharing issue, APIC is a requirement for Windows logo. In 
Linux APIC is a little murky, it's only turned on if you're using an SMP 
kernel. I've found that even on a single processor system, using an SMP 
kernel will turn on IO-APIC. During kernel config, there're 2 options 
for uniprocess APIC and IO-APIC. For some reasons, I can't get the 
uniprocess IO-APIC to work. But if I set the SMP option, it does come 
on. On my nForce Athlon, using RH's SMP kernel will allow the OS to 
allocate up to IRQ 19 without any sharing. IIRC, the maximum is 
24/processor.

FYI.

Joe Antkowiak wrote:

>You can force IRQs in your BIOS config, I would set each card to its own IRQ
>that doesn't get shared with anything else.  Disable your serial and
>parallel ports if you aren't using them and use 3,4,5,7
>
>-----Original Message-----
>From: asterisk-users-admin at lists.digium.com
>[mailto:asterisk-users-admin at lists.digium.com] On Behalf Of Derek Beaumont
>Sent: Monday, July 07, 2003 4:15 PM
>To: asterisk-users at lists.digium.com
>Subject: [Asterisk-Users] PCI Master Abort
>
>I am always getting multiple PCI Master Abort messages when I try to
>plug in a second TDM400P.
>I have asked this question before, but I nothing really solved my
>problem and I just put it on the back burner for a while.
>I am at a point where this is a crucial issue.
>
>I have read that the Zaptel devices share an IRQ, is this causing the
>problem?
>Is there a way that I can manually change the IRQs of the devices?
>
>By the way, my hardware situation is as follows:
>2 X100P
>2 TDM400P
>
>Any help is always appreciated.
>
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