* train <trainpn> home [-]<segpn> [-]<segpn> [-]<segpn>
* seg <segpn> has [-]<ownerpn>
* seg <segpn> at <movposcomb>
+ * feature <trainorfeatpn> <letter> is <addr> <nmranum>
+ * feature <trainorfeatpn> <letter> is <addr> step [-]<nmranum>
*
* speed is in um/s, upwait and downwait are in us
*/