Just for the archives - this turned out to be an issue with interrupts 
not being enabled yet - I had to defer part of the configuration with 
config_interrupts().  That, and I had a flag set wrong so the board was 
incorrectly having its serial input inverted.  :}

+j

Jeff Rizzo wrote:

>
> I'm working on porting a driver ("wcfxo") from FreeBSD for Digium 
> X100P boards (and clones) for use with the Asterisk PBX 
> (www.asterisk.org), and I'm having what appear to be interrupt-related 
> problems - namely, I'm not getting any from the board most of the 
> time.  Under FreeBSD, it works most of the time on the same 
> motherboard, though I _have_ gotten it to fail in a similar way, 
> namely that the interrupt routine never gets called.  _Once_ (and 
> never again), I managed to get it booted in such a way under NetBSD 
> that I was getting interrupts.
>
> I've twiddled various PCI interrupt settings on my motherboard, but I 
> haven't gotten a single setting that seems to work much better than 
> others - in some slots, the card gets its own irq, in others it shares 
> with (for example) the onboard IDE controller - it seems to work 
> better under FreeBSD with the non-shared slot, but I can't reliably 
> get it to fail under FreeBSD or work under NetBSD.  :(
>
> Would someone be willing to help me out a bit here - make some 
> suggestions of things to try in the BIOS, look at code and suggest 
> changes?  Interestingly enough, in one of my systems (dual p3 with 
> serverworks chipset), having one of these cards installed makes the 
> BIOS screen not even come up.  :/  (I have two of them, they both act 
> the same - they're both the same manufacturer, though)
>
> I realize there isn't much detail in this post - I've been banging my 
> head against this for a couple days and can't figure out what I might 
> be doing wrong.
> Thanks,
> +j