>  a 386ex board with a flash memory on it
> --enablertemsbsp="i386-rtems"

That does not look like the name of a valid board support package.
You need to look in the i386 directory, and find a board support package which will work for your board, or close to it.
In old releases I think it was "i386ex," but I haven't kept up with what packages support the ex processor in current snapshots.

-- Chris Caudle


