1. A digital data bus system useful in a digital computer system including memory means for storing said data and providing said data at a first predetermined time interval after responding to a first memory input signal, said data bus system comprising: memory input bus means connected to said memory means for conducting said first memory input signal to said memory means; memory output bus means connected from said memory means for conducting said data provided by said memory means; and memory bus interface means comprising generating means connected to said memory input bus means for generating said first memory input signal, timing means responsive to operation of said generating means for measuring said first predetermined time interval beginning when said generating means has generated said first memory input signal, and data receiving means connected from said memory output bus means and responsive to operation of said timing means for receiving said data when said timing means indicates passage of said first predetermined time interval.