Allows you to run the currently loaded program one step at a time, mainly used for debugging.

Whilst running the following screen is shown, displaying mode (Step), speed, current position and the next command to be executed displayed after the '>' prompt.

Keys:-

[>>] Executes current command, screen updates to reflect next command.

[G] Enters Run mode and continues full speed program execution from current point.

[S] Terminate program.