Intel Atom N270 - unknown CPUID cache descriptors

[idata]

Hi,

Recently I found out a strange output of CPUID in Intel Atom N270 processor. It gives cache descriptors (CPUID function 02h) of 59h, BAh, 4Fh, C0h, 80h and 0Eh which are not defined according to the most up-to-date version of Application Note 485 (August 2009). Could you confirm the same results? I use a simple program I have written in assembler for MS-DOS, but AFAIK CPUID works in all modes the same way.

[idata]

Hello,

Have you tried other software like CPUZ, Crystal Mark etc.?

Post the tools that you are using so that i can give it a try may be next week.

Zip it and attach it.

All the best,

Regards,

Aryan

[idata]

Hi,

I browsed through the register dump from CPU-Z ver. 1.52.1 (latest) and it seems the cache descriptors have the same values as returned by my program. However, CPU-Z probably does not decode them, as there is deterministic cache information in the processor.

You can dowload my program from http://157.158.56.13/BZ/CMD.COM http://157.158.56.13/BZ/CMD.COM and run with cpu option (cmd cpu). BTW, it can also do few other things, e.g., display PCI devices info (only under MS-DOS or Windows 9x) or measure CPU clock frequency according to Intel's procedure found in AP485 (pci and clk options).

Best regards,