| 摘要 |
PURPOSE:To load the control storage at high speed by using a scan path for control storage and loading the remaining microprograms into a microprogram that is stored via an exclusive scan path. CONSTITUTION:A shift-out control circuit 8 selects a single piece of shift-out data received from a 1st or 2nd scan path with a mode signal 12. Then the circuit 8 selects a control storage loading scan path 4 for formation of a scan path passing through a control storage writing register 2. Under such conditions, a single microprogram word to be stored in a control storage 1 is prepared with the shift-in data 13. Then a microinstruction equivalent to one word is loaded into the register 2 and at the same time the clocks are continuously applied until the control information on both registers 30 and 3n are set. The microinstruction is stored in the storage 1 with the control information on the registers 30 and 3n. Thus the storage 1 is loaded at the high speed.
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