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From: Doug Rabson <dfr@nlsystems.com>
To: "M. Warner Losh" <imp@bsdimp.com>
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Subject: Re: cvs commit: src/sys/dev/fdc fdc_isa.c
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On Tue, 2004-08-31 at 21:42, M. Warner Losh wrote:
> In message: <20040831203807.GA60718@freebie.xs4all.nl>
>             Wilko Bulte <wb@freebie.xs4all.nl> writes:
> : On Tue, Aug 31, 2004 at 08:37:10PM +0000, Warner Losh wrote..
> : > imp         2004-08-31 20:37:10 UTC
> : > 
> : >   FreeBSD src repository
> : > 
> : >   Modified files:
> : >     sys/dev/fdc          fdc_isa.c 
> : >   Log:
> : >   When ISA_PNP_PROBE is called, it will return 0 when it finds a device,
> : >   ENOENT when there's no PNP ID for this device node, or ENXIO when there
> : >   is one, but it doesn't match.
> : >   
> : >   In the nonPNP case (as most Alpha systems appear to be), we were
> : 
> : I think no Alpha has PNP.
> 
> Makes sense.  The Floppy controller usually shows up in the PNP BIOS
> or ACPI tables.  I do believe that Alpha supports the ISA PNP,
> however, for add-in cards.  We map both PNP BIOS and ISA PNP into the
> same thing (which is probed with ISA_PNP_PROBE).

There is also a hardware list which SRM has that we could use to imitate
PnP bios if someone could be bothered to figure out the format.