Re: [Qemu-devel] linux-test image for user-net?

[Paul Brook <paul@codesourcery.com>]

On Tuesday 15 November 2005 20:49, Jamie Lokier wrote:
> Paul Brook wrote:
> > On Tuesday 15 November 2005 20:36, Stealth Dave wrote:
> > > Is it possible to build a linux-test image that enables network access
> > > via user-net instead of tun/tap?
> >
> > The guest OS doesn't care whether qemu is using user-net or tun-tap.
> > The linux-test image downloadable from the qemu website doesn't work
> > properly because it only contains the ISA ne2k driver, and qemu now
> > emulates a PCI ne2k card.
>
> Perhaps qemu's PCI ne2k emulation could be changed to accept accesses
> to the I/O addresses of the classic ISA card too - and disabling the
> PCI addresses if an OS touches the ISA ones?  Old OSes which only know
> about ISA ne2k would work, and newer ones which enumerate it through
> PCI would also work.

You can tell qemu to emulate an isa only system. 
Having the same [virtual] hardware respond to both ISA and PCI is a bad idea. 
It'll break horribly as soon as an OS loads both drivers.

Paul