cvs commit: src/sys/dev/fdc fdc_isa.c

[John Baldwin]

On Thursday 02 September 2004 06:01 pm, Wilko Bulte wrote:
> On Thu, Sep 02, 2004 at 01:44:41PM -0700, Peter Wemm wrote..
>
> > On Wednesday 01 September 2004 06:47 am, Doug Rabson wrote:
> > > On Tue, 2004-08-31 at 21:38, Wilko Bulte wrote:
> > > > 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.
> > >
> > > All alphas with ISA busses support ISA PnP. I used to use it with an
> > > old ISA PnP sound card in my 164lx.
> >
> > Exactly.  Firmware support isn't required.  ISA-PnP is a hardware level
> > protocol.  You can plug an isa-pnp card into any machine with physical
> > isa slots and have to use the isapnp interface to wake the card, probe
> > it, assign irqs etc.  On PC's, this is typically done by the bios for
>
> OK, maybe I should have said that (AFAIK..) there is nothing in SRM
> that would do that on Alphas.

Yes. PnPBIOS is different from ISA PnP, but they look the same to ISA device 
drivers in FreeBSD.  It is definitely true that Alphas do not enumerate 
floppy drives via PnPBIOS, and I don't know of any PnP floppy drives.

> DEC did not have too many ISA cards for Alphas as far as I remember.
> EISA cards were used (Adaptec 174x, 274x, Compaq Qvision VGA,
> DEFAA (?) fddi, DE42x ethernet is what comes to mind.

-- 
John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org