move uart helper to uart.S
dump_urom example

Shows how to dump the utility ROM.
add support for JTAG and flash registers

Those are undocumented but can be found in various other datasheets
and application notes by maxim.
execute from ram example

Show how to execute code from the RAM. This actually reads directly
from the flash controller.
add tiny serial terminal by Ivan Tikhonov

Little bit modified to be able to reset the remote control.