| 摘要 |
PURPOSE:To shorten the check time by providing a decoder which generates such control sequence that information can be directly inputted to and outputted from at least one of internal registers from and to an external terminal. CONSTITUTION:After the operation executed till then is stopped, a control part 2 suppresses the operation of an instruction decoder 3 by an instruction decoder operation signal and operates a register input/output decoder by a register input/output decoder operation signal. The control part 2 outputs a control signal select signal to a control multiplexer 18, and thereby, the control multiplexer 18 outputs the control signal outputted from the register input/output decoder 16 to a data processing part 4. The control part 2 outputs an address select signal to a multiplexer 17, and the multiplexer 17 outputs location information and input/output direction information inputted from an address output terminal 8 to the register input/output decoder 16. Thus, the check time of an information processor is shortened. |
