Re: reading/writing CMOS beyond 256 bytes?

David Woodhouse (dwmw2@infradead.org)
Mon, 09 Jul 2001 12:46:04 +0100

root@chaos.analogic.com said:
> Motherboard manufacturers who have rewritable BIOS chips now leave one
> page (typically 64k) for startup parameters. This is erased and
> written using the magic provided by the chip vendors.

You often have to do chipset-specific magic to enable the WE and Vpp lines
to BIOS flash chips. See drivers/mtd/maps/l440gx.c in my working tree for
an example.

Don't try this at home, kids. :)

--
dwmw2




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