A computer system memory module includes a bi-directional repeater hub that in a first direction takes as an input a memory bus signal in a first port, regenerates the memory signals, and outputs the regenerated memory signal at a second port as at least one separate signal for coupling to a memory bus for each of the regenerated separate signals. In a second direction, the bi-directional repeater hub takes as input at least one memory bus signal at the second port, regenerates each input memory bus signal, and outputs the regenerated memory signal at the first port for coupling to a memory bus. A method includes determining whether a memory device to which signals are addressed is on a first memory module. Signals are routed to a first memory bus on the first memory module connected to the memory device if the memory is on the first memory module. Signals are routed to a second memory bus on a second memory module if the memory device is not on the first memory module.