The redstone program can be used to get, set or pulse redstone inputs and outputs from the computer.

ex:
"redstone probe" will list all the redstone inputs to the computer
"redstone set left true" turns on the left redstone output.
"redstone set right blue false" turns off the blue wire in the bundled cable on the right redstone output.
"redstone pulse front 10 1" emits 10 one second redstone pulses on the front redstone output.

Type "help redstone" or "help rs" for information on the redstone Lua API.