On Thu, Apr 12, 2007 at 10:54:17AM +0200, Dag-Erling Smørgrav wrote: > Peter Jeremy <peterjeremy_at_optushome.com.au> writes: > > There's a feature bit (CPUID_CX8) that advertises the availability of > > cmpxchg8b (and maybe some related instructions). My pre-MMX 586 has > > this bit set so I presume anything later than 486 will support it. > > (I'm not sure about the low-end VIA, GEODE etc clones). > > The Geode is a 486, and does not support it. The Geodes found in both my net4801-50 and net4801-60 are both i586-class CPUs with CX8 support: $ dmesg | grep -A 2 ^CPU CPU: Geode(TM) Integrated Processor by National Semi (266.65-MHz 586-class CPU) Origin = "Geode by NSC" Id = 0x540 Stepping = 0 Features=0x808131<FPU,TSC,MSR,CX8,CMOV,MMX> Regards, Brix -- Henrik Brix Andersen <henrik_at_brixandersen.dk>
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