io.h and I/O port access from user space

Jeffrey D. Kowing jeffrey.d.kowing1 at
Wed Feb 6 11:16:15 EST 2002

Hollis Blanchard writes:
 > Have you tried enabling CONFIG_PNP and CONFIG_ISAPNP? That's all I had
 > to do to get ISA PnP working for an onboard sound card here.

Yes, I had tried that but all I got was the following message on my
console during bootup:

isapnp: Scanning for PnP cards...
isapnp: No Plug & Play device found

I did notice that on my Redhat 7.1 host machine I have a
/usr/lib/modules/modules.isapnpmap file that I lack the equivalent for
on my target powerpc machine.  The file is a listing of
vendor/device/function ids.  Perhaps this may be important for the
CONFIG_ISAPNP functionality?  Any suggestions or pointers welcome !

Anyways, thanks for the suggestion.  I guess I need to go educate
myself on the PnP protocol a bit more.


Jeff Kowing
jeffrey.d.kowing1 at

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