- The python code in tos-bsl.in runs on Linux or in Cygwin but the latter
  requires installation of the cp210x_rt python shim module, which is not
  yet built or installed by the makefile.

- The Cygwin/Windows code is currently not built, but untarred from a tarball.
  This code is apparently from V1.5 of tos-bsl, prior to support for the
  modular architecture and cp2103 additions in V1.6.  This code should be
  rebuilt.

- The Binary windows version should be built from source.