Question about IBM405 and IRQ

[Juergen Beisert]

Am Mittwoch, 1. Oktober 2003 06:02 schrieb Shih-Ying Chou:
> The following is the /proc/pci
>
> PCI devices found:
>   Bus  0, device  10, function  0:
>     USB Controller: NEC Corporation USB (rev 65).
>        IRQ 25
<snip>
>     USB Controller: NEC Corporation USB 2.0 (rev 2).
>       IRQ 25
>       Master Capable.  Latency=128.  Min Gnt=16.Max Lat=34.
>       Non-prefetchable 32 bit memory at 0xbfffdf00 [0xbfffdfff].

Are you shure logical IRQ25 is connected to your PC104plus slot? Have a look
into CPU registers UIC0_PR and UIC0_TR: Is IRQ25 configured for negative
level triggering (like the PCI bus need)? Register CPC0_CR0: Is the physical
IRQ0 (logical IRQ25) enabled?

Hope it helps
-- JB

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