TMPL_128_MKEY.txt
count: list (2-byte zero-based item count)
  box: rectangle
  keystring: pstring (1-byte length; 256 bytes reserved)
  characterPlain: 1-byte integer (char)
  charachterShift: 1-byte integer (char)
  characterOption: 1-byte integer (char)
  characterOptionShift: 1-byte integer (char)
  keycode: 1-byte integer (char)
  modifiers: 1-byte integer (hex)