ES4 -- an experiment in hosting ES4 on the AVM

USAGE

  At the prompt enter one of the following sentences:

  <program>             - evaluate <program>
  .load <filename>      - load and evaluate the contents of <filename>
  .trace { on | off }   - turn tracing on or off
  .test                 - runs self tests
  .help                 - display information about this interpreter
  .quit                 - quit this shell program