Abstract: The present invention provides a method and apparatus for combining tristate buffers into busses with a large number of drivers. The invention provides for an arbitrary number of drivers to be accommodated on a single line in a circuit wherein the number of tristate buffers coupled to the line is limited. A plurality of lines are used to support the required number of tristate buffers, and a multiplexing circuit is used to select the active line. Tristate control signals for the tristate buffers are utilized to generate the requisite multiplexer select signals. In one embodiment, the multiplexing function and the select signal generation logic are implemented in configurable logic blocks. In another embodiment, wired logic functions perform the select signal generation, and a cascade configuration of tristate buffer driven lines performs the multiplexing function.