I've tried two different cards with this machine.  One is a modern 
Creative Labs Sound blaster with pnp support.  NetBSD 1.2g has isapnp
support in it and this card probes with isapnp settings, which look
reasonable.  the behavior of the driver is as if interrupts are merely
disabled.  No stray interrupts get generated and the  processes writing to
the audio device get stuck in "aud wr".
	The second card is not a pnp capable device and probes with the message 
that the card is configured for an invalid interrupt.  If I use a hard
coded interrupt in the configuration file, it probes like the pnp capable
card, and behaves the same way.  That is, interrupts never get generated.

	I don't know why versions of NetBSD later than 1.3 seem to hang this 
machine.  They seem to hang the isa bus in some way.
Any thoughts are greatly appreciated.
-Brian
On Aug 8,  3:42pm, David Maxwell wrote:
} Subject: Re: SOUND BLASTER INTERRUPT CONFIGURATION
} On Tue, Aug 08, 2000 at 07:40:13AM -0700, Brian Buhrow wrote:
} > 	Hello Folks.  I'm trying to get an old sound blaster 16 working on my NetBSD
} > I386 box.  My problem is that I can't get the driver to program the card to
} > use the correct interrupt.  The card appears to have software programmable
} 
} The driver doesn't know how to do that. Documentation isn't reliably available
} for those types of functions, and while there are lots of SB compatible cards,
} each one might do that setup function differently.
} 
}  > interrupt channels, but the sb driver appears not to know how to set them.
} 
} Use the setup disk that comes with the card (or downloadble from Creative, I
} guess) to set the card up. 
} 
} If you had something newer than 1.2G, I'd say prefferably pick PnP.
} I don't remember ever seeing a jumperless SB that didn't support PnP mode.
} NetBSD 1.2G though, was before good PnP support - I think it was available
} as patches at that time. So, go for IO220/IRQ5.
} 
} > I'm using an older machine with NetBSD 1.2G and sb version 1.54, and I
} > can't use a newer version of NetBSD because they don't work on this
} > hardware.
} 
} Newer versions of NetBSD don't work on that hardware? Do you mean the
} install floppy doesn't work, or something else? I can't think of anything
} that's been de-supported on i386.
} 
} -- 
} David Maxwell, david@vex.net|david@maxwell.net -->
} Any sufficiently advanced Common Sense will seem like magic... 
} 					      - me
>-- End of excerpt from David Maxwell