Abstract: A system for displaying instruction syntax help information to a user as instructions are entered into an editor or other tool. The instruction syntax is presented with the next parameter in the instruction highlighted to prompt the user for entry 6f that parameter. A database of instructions and their syntax is provided to facilitate efficient search and retrieval of the instruction syntax for each instruction of the language.

Abstract: An adaptable controller for controlling variable numbers of switches is disclosed. Specifically the controller is useful in an irrigation system having a number of water sprinklers whose operation may be controlled by user-defined programs. The system has a processor unit, an interface unit and a number of add-on units. Switches for actuating electrically-operated devices such as sprinklers are located on the interface unit and the add-on units. The controller allows a user to enter operating parameters relating to the switches in the form of the user-defined programs. The processor is capable of ascertaining the number of switches on the interface unit and the add-on units and limiting the number of switches selected and controlled by the user-defined programs.