[SeaBIOS] SeaBIOS as EFI application

Kevin O'Connor kevin at koconnor.net
Sat Nov 10 22:07:45 CET 2012

On Sat, Nov 10, 2012 at 11:30:39AM -0800, Jordan Justen wrote:
> On Sat, Nov 10, 2012 at 8:25 AM, Thorsten Glaser <tg at mirbsd.de> wrote:
> > Kevin O'Connor dixit:
> >>1 - Using SeaBIOS as a CSM.  The CSM spec is amazingly complex as
> >
> >>2 - Implementing in SeaBIOS a subset of the EFI OS interface so that
> >
> > Both aren’t really what I want.
> It sounds like you definitely don't want 2, but you do want something
> similar to 1. In a UEFI+CSM system, the CSM essentially provides the
> environment that legacy BIOS based software can use.

I don't think one can add a CSM to an existing machine though.  So, if
you're looking to boot DOS from a machine with an off-the-shelf UEFI
implementation without a CSM then I don't think adding a CSM will


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