Re: [Devil-Linux-discuss] Cyrix CPU

[Wally DL <wal...@ya...>]

Hi,

As I posted to this list a couple of months ago, I
couldn't get my Cyrix MediaGX-based PC to run Devil
until I disabled PCI support in the kernel.  Maybe the
C3 has the same problem?

This is no hardship for me since I use only the ISA
slots in my ancient PC.  I searched the kernel mailing
lists for help with this.  My problem seems to only
occur in the 2.4 kernel.

Wally


--- Ed Hemphill <ed...@ed...> wrote:
> Matthew Smith wrote:
> 
> > Hi Heiko
> >
> >
> >> A few users reported problems with the Citrix
> CPUs, it seems they're 
> >> only 99% x86 compatible.
> >
> >
> > I can confirm that this is a known problem - I was
> given access to a 
> > load of Cyrix-based PCs for a charity project; I
> use SuSE Linux on 
> > most of my servers and desktops.  I tried three
> different versions and 
> > *none* will complete the install on a Cyrix
> machine.
> >
> > Cheers
> >
> > M
> >
> >
> True. Cyrix (Via) C3s dont implement the
> conditional-move (CMOV) 
> instruction. When gcc compiles for x686 it uses CMOV
> even though Intel 
> claims CMOV is an 'optional' instruction for x686
> compatibility. If you 
> want stuff to run on C3 you need to compile for
> i586. Apparently the C3 
> is really made to run i486 instructions optimally -
> so it might be 
> better to compile for 486. However I cant get the
> one I have to run DL 
> at all even when compiled for 486. go figure.
> 
> -Ed
> 
> 
> 
> 
>
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