Re: [ECOS] Newbie questions

[Jose Souto <souto at contronics dot com>]

Hi Madhu,

Your answer is yes.
You need a bios customized to your hardware that does at least CPU
registers configuration (if needed), SDRAM memory controller configuration
(and basic memory test - for sanity), Super I/O and COM1 38400-8N1
programming or any other serial port support and network interface
configuration, if you intend to use RedBoot with network support.

The last thing this bios should do is to enter protected mode and do a "FAR
JMP" to the RedBoot entry point. The sample "romboot" available does
nothing specific to your hardware but is a fair starting point. You don't
have to reinvent a bios but you need to have at least the SDRAM working,
the other things may be done in C at the beginning of RedBoot...

Jose Luiz

Madhu Lakshmanan wrote:

> Does Redboot for an x86 platform assume that chipsets
> like the Northbridge, Southbridge, etc., are
> initialized by a BIOS?
>
> Can I use the current / latest Redboot sources to
> create a Redboot for a generic x86 PC which _does not_
> have a BIOS?
>
> Thanks,
>
> Madhu Lakshmanan
>
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Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
and search the list archive: http://sources.redhat.com/ml/ecos-discuss