The following option restricts the subsequent run to ``forwards only'' for just space-time patterns.
forwards only (uses less memory, slower)-y:
If ``y'' is selected. the 2d network is not wired up, saving memory that would otherwise be allocated to specify the wiring. The option is useful to run just space-time patters (as for the ``game of Life``) if memory is limited. The ``forwards only'' run will be slower as each cell's 2d neighbourhood must be redefined at each pass. For a system with 8Mb RAM selecting this option should not be necessary.