now that we create segmented UF2 files properly in concatenate, we need
the ability to read them, which we'd previously saved for later; that
time is now. the reader now supports jumps forward (but not backwards,
and I don't know how likely it is we'll ever see this)
Signed-off-by: Brian S. Stephan <bss@incorporeal.org>
Brian S. Stephan
6a802bb232
