Hello,
it's possible to reconfigure u-boot (etc) to have the OS on the Card's
micro-sd.
I believe I’m using a quite old u-boot boot script.
that is irrelevant. u-boot-spl.bin is what needs compiling and that is done with compile options. "make config".
i think.
you need to establish which phase has been achieved. there are MULTIPLE phases. EVERY ONE OF THEM needs properly configuring.
I should have a working u-boot configuration and binary somewhere on my hard drive. Let me check my files. Hopefully I will also find some comments and notes that are not yet in the rhombus-tech wiki. My search and answer on the mailing list may take me a few days.
Pablo