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SubjectRe: reading/writing CMOS beyond 256 bytes?
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> Unfortunately, it seems that some settings are not in the 128 (or 256)
> bytes accessible this way, so they must be stored elsewhere.

Large numbers of BIOS settings are in the NVRAM ESCD area in modern systems
(EISA config, ISAPNP config, etc)

> Does anyone know where I should look for the remaining parts of CMOS
> (short of having to sign some NDA with Intel?)?

The PnPBIOS and ESCD specs are publically available if a little impenetrable

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