nuttx/boards/z80/ez80/ez80f910200kitg/configs/ostest

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