[coreboot] ### coreboot, geode lx

Steve Spano steve at fl-eng.com
Wed Feb 27 04:06:39 CET 2008

Hi Joe

Thanks for the reply.

The compact flash card does show up as a regular disk; under the
commercial BIOS. 

I'll get a new card tomorrow and wipe it clean and reinstall, see if
that gets it going.

So basically, if FILO is in coreboot - it will look at the MBR and
decide on what filesystem it should attempt to mount? 

Anyone know of an LPC flash emulator so its easier to develop the BIOS
code - rather than plugging/unplugging flash chips all the time?


Steve Spano, President
Finger Lakes Engineering

-----Original Message-----
From: coreboot-bounces at coreboot.org
[mailto:coreboot-bounces at coreboot.org] On Behalf Of
joe at smittys.pointclark.net
Sent: Tuesday, February 26, 2008 9:29 PM
To: coreboot at coreboot.org
Subject: Re: [coreboot] ### coreboot, geode lx

Quoting Steve Spano <steve at fl-eng.com>:

> Hello folks,
> We have developed - basically a clone of the DB800 Amd Geode LX800
> reference system.
> We have an LX800, CS5536, SST04 LPC Flash (512KB) and a compact flash
> card - 1GB.
> The system is booting Ubuntu 6.10 using a commercial BIOS.
> I have downloaded the corebios and wish to get it running on our
> I have been able to download it, configured with FILO and its almost
> working.
> What I want it to do is boot into the GRUB sector of the compact flash
> card and then allow grub to let me select what linux kernel/etc to
> When corebios loads FILO, filo says "mounting FAT" and it cannot find
> our grub sectors/etc on the compact flash card. Shouldn't this be EXT2
> that it mounts.
Can you confirm this is was partitioned as ext2?
> I have adjusted the configs for FILO to attempt to remove FAT, but it
> still keeps coming up. Seems like I a missing something pretty simple.
Maybe the MBR on your CF card has a fat partition entry on it?
you can try wiping the mbr with dd:
dd if=/dev/zero of=/dev/hda bs=512 count=1
But be warned dd can be dangerous so be careful.
> Can anyone point me to a reference on how to configure the latest
> corebios/FILO package to boot into an IDE compact flash (the compact
> flash card is right on the IDE bus of the CS5536).
Doesn't it just show up as a drive?
> Also - doesn't have to be FILO. I saw etherboot can boot to IDE as
> I just want a BIOS so I can alter the memory timings/etc and jump to
> compact flash card for booting. So whatever is easiest.
Etherboot works too, but only upto version 5.2.6

Hope that helps.

Thanks - Joe

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