[Asterisk-Users] RE: TDM Card loses Dialtone and Battery

[Sean Cheesman]

The interrupts are assigned by the BIOS at startup.  In your BIOS setup, do
you have the ability to assign IRQ's to particular PCI slots?  Each system
board is different, but most allow you to override somehow.  You might have
to set the Plug and Play Aware OS (or whatever yours is) to no to enable
those options.  Some IRQ's that are usually available are 5, 10, and 11.
Others can be available depending on your system configuration and what all
is enabled.  As a typical rule, here's the breakdown:

0: system timer
1: keyboard
2: cascade to 9
3: COM2/TTYS1
4: COM1/TTYS0
5: available
6: Floppy Disk controller
7: LPT1
8: Real Time Clock
9: PCI Steering (bridge to IRQ2)
10: Available
11: PCI Steering (usually available)
12: Mouse
13: Math Coprocessor
14: IDE0 (Primary IDE)
15: IDE1 (Secondary IDE)

Obviously if you have something disabled, you can use it's IRQ without
problems.  Any IRQ's over 15 are virtual IRQ's that are being assigned
either through the BIOS or possibly through the OS, although I am unsure
whether Linux does this?

Sean


-----Original Message-----
From: Victor Rini [mailto:victor at paceint.com]
Sent: Monday, December 29, 2003 12:37 AM
To: 'asterisk-users at lists.digium.com'
Subject: [Asterisk-Users] RE: TDM Card loses Dialtone and Battery


Sean,

Yes, that IRQ assignment seemed strange to me too.

I don't understand why the kernel wanted to assign IRQS this way.

I guess it's something to do with this APIC technology.

Can anyone fill me in here?

By the way, thanks to everyone who has contributed to this thread.
It's really helped a lot.

Victor

           CPU0
  0:     102777    IO-APIC-edge  timer
  1:        471    IO-APIC-edge  keyboard
  2:          0          XT-PIC  cascade
  8:          4    IO-APIC-edge  rtc
 14:       9159    IO-APIC-edge  ide0
 15:          6    IO-APIC-edge  ide1
 17:    1995769   IO-APIC-level  wcfxo, wcfxo
 18:     341396   IO-APIC-level  wcfxs
 19:          0   IO-APIC-level  EMU10K1
 20:       3390   IO-APIC-level  eth1
 21:       8652   IO-APIC-level  eth0
 22:        788   IO-APIC-level  eth2
NMI:          0
LOC:     102728
ERR:          0
MIS:          0

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