loaded button switch depression of the switch initiates a number of operations within the mode controller first the outputs of port status sampler 26 are disconnected from led drivers 24 this interrupts or disables the primary mode display function of the leds 13 and enables a secondary mode the software then directs mode controller 23 to send a secondary mode confirmation signal to all inputs of led drivers 24 this will cause the entire matrix of leds to light momentarily and then turn off confirming to the user that the secondary mode configuration function has begun the software then triggers function selection timer 28 timer 28 has a repetitive output pulse which is sequentially routed through mode controller 23 to the inputs of led drivers 24 in a preferred manner of operation a first leftmost column of leds 29 comprised of a pair of leds will light momentarily for a predetermined period of time and then turn off when timer 28 times out this period of time is entirely arbitrary but two seconds or so should be sufficient to allow the user to effect the selection step described below while illuminating a column pair of leds is preferred illuminating only a single led in a column or other arrangement of leds is entirely satisfactory as long as the user can identify that led with a particular configuration.