| 摘要 |
PROBLEM TO BE SOLVED: To actively insert/eject a peripheral device for a computer to/from a bus line of the computer. SOLUTION: A bus switch 60 opens/closes bus lines 16a, 16b. A bus switch control circuit 61 generates a bus switch control signal responding to a turn-around cycle from a signal of a bus line 16a and supplies the control signal to the switch 60 through lines 305 to 311. The switch 60 executes opening/closing operation in response to the bus switch control signal. Since the bus line 16a is in a turn-around cycle at the time of connecting or releasing the bus lines 16a, 16b, the influence of noise due to the opening/closing of the bus line 16a/16b is not exerted upon bus cycle operation.
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