| 摘要 |
PURPOSE:To increase a substantial machine cycle with less amount of hardware, by reducing a waiting time through the difference of confirming timing of branch conditions, in a data processor of a microprogramming control system. CONSTITUTION:A timing control circuit 10 controls an operating timing of each device, and three phase fundamental clocks T0, T1 and T2 and a dummy clock TX are outputted. When branching is confirmed for establishment/unestablishment before a point A, one machine cycle is finished with three clocks of T0, T1, and T2 (S type machine cycle 11), and when not confirmed before the pint A but confirmed at a point B, one machine cycle is finished with 4 clocks of T0, T1, T2 and T3 (L type machine cycle 12). The both machine cycles are determined with a value of a conditional branching field 5, and when the circuit 10 takes the L type machine cycle, the clock TX is inserted after the clock T1 to give a delay to the generation of the T2. |
