README.txt
^^^^^^^^^^

ostest.zdsproj is a simple ZDS-II project that will allow you
  to use the ZDS-II debugger.  Before using, copy the following
  files from the toplevel directory:
  
  nuttx.hex, nuttx.map, nuttx.lod
  
  to this directory as:
  
  ostest.hex, ostest.map, ostest.lod