[LinuxBIOS] Fwd: rdcmos

[ron minnich]

Here from the author (Eric Hendriks) are the tools to read and write cmos.

Thanks

ron

[Stefan Reinauer]

* ron minnich <[e-mail]> [071127 22:36]:
> Here from the author (Eric Hendriks) are the tools to read and write cmos.
>
> Thanks
>
> ron

Alternatively, you can use a utility that is part of the LinuxBIOS
utils/ tree: lxbios. It reads/writes up to 256 byte cmos, and also lets
you read the linuxbios table, letting you change specific CMOS settings,
too, in addition to dumping/recovering all of CMOS.

Stefan

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[Jeremy Jackson]

Where is this magical utility?  I'm stuck trying to fix vendor BIOS cmos
issue with Tyan S2865, some memory parameters are outside the usual
128bytes CMOS.

I see LinuxBIOSv2/util/lxbios ... I guess I'll give it a shot.. this
email might just be the breadcrumb trail that leads someone else out of
the woods.

Jeremy

On Wed, 2007-11-28 at 09:45 +0100, Stefan Reinauer wrote:
> Alternatively, you can use a utility that is part of the LinuxBIOS
> utils/ tree: lxbios. It reads/writes up to 256 byte cmos, and also lets
> you read the linuxbios table, letting you change specific CMOS settings,
> too, in addition to dumping/recovering all of CMOS.
>
> Stefan

[ron minnich]

I posted rdcmos to this list a while back ...< 3 months ago I think.
Will try to find it again.

ron

[Jeremy Jackson]

It's OK, I have the one posted to the list (haven't tried it).  I tried
lxbios, and while it seems to output/input 256 bytes, these Tyan S2865
are still retaining some settings that clearing CMOS with a jumper on
the motherboard wipes out.

Does anyone know (CK804 datasheet holders hello!) if there is more than
256 bytes of NVRAM on this board, and/or if lxbios utility is able to
backup/restore all of it?

Symptoms are, when upgrading a board with vendor BIOS from 3.02 to 3.04,
the DRAM setup screen is *missing* some options, in particular Hardware
remapping, and Trcd 1/2, which matters with 4 DIMM slots filled.

On clearing CMOS with jumper, the extra options in 3.04 appear.  So far,
clearing it is the only way I've found to fix it.  using linux nvram.ko
and lxbios to save from a "good" board, and restore to a "bad" board,
doesn't work.  Reset ESCD from BIOS menu doesn't help.

Regards,

Jeremy

On Thu, 2008-01-17 at 22:58 -0800, ron minnich wrote:
> I posted rdcmos to this list a while back ...< 3 months ago I think.
> Will try to find it again.
>
> ron