On Sat, Nov 10, 2012 at 1:07 PM, Kevin O'Connor <kevin(a)koconnor.net> wrote:
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(a)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.
I think you could load it similarly to an OS, but what you load would
probably require some chipset/platform knowledge.
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
Yes, I think you are correct, due to the chipset/platform legacy
pieces that likely aren't provided in a non-CSM UEFI system.