PPC embedded plans ?

Hi,

I have a working 2.4.2 port for a board for SBS-or (VG4) here
and wanted to migrate this port to 2.4.9.

Checking out the sources I think I  can notice that there is a strong
push towards some kind of "one file" machine definition.

Is this right ?
And what would be the best 2.4.9 to start out with ?
Any written policy on the setup of the machine dependant stuff ?
Any way of getting my board defs into the official (?) PPC source tree ?

BRGDS


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