AC'97 (VT82C686A) & IRQ reassignment (I/O APIC)

From: Greg Hosler (hosler@lugs.org.sg)
Date: Mon Apr 30 2001 - 10:38:25 EST


The AC'97 has an IRQ register which allows for IRQ's 1, and 3 thru 14
(page 107 of the VT82C686 datasheet, under section "Offset 3C, Interrupt Line")

The problem I'm seeing is that on a SMB machine, the IRQ's get reassigned by
the I/O APIC code, and my AC'97 gets assigned an IRQ of 18 (which won't fit into
4 bits :(

Is there any way to reassign an IRQ to one that teh AC'97 will be happy with ?

Does any other device already have to do this ?

thx, and rgds,

-Greg

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| Greg Hosler i-net: hosler@lugs.org.sg |
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