| 摘要 |
PURPOSE:To provide the bus check device which does not occupy a system bus by inputting/outputting a check pattern to the system bus by utilizing a period when no information is transferred. CONSTITUTION:This device is provided with an arithmetic means 3 to calculate and output the OR of plural bus use permit signals outputted from a bus priority deciding means 1, signal generating means 4 to output a signal for check to a system bus 2 during a bus use disable period discriminated from the output of the arithmetic means 3, and discriminating means 5 to check the state of the system bus 2 by comparing the signal for check received from the signal generating means 4 through the system bus 2 with the signal for check generated by the signal generating means 4. |
