| 摘要 |
PURPOSE:To start recording an interface signal, to stop it, etc., by providing a means, etc. for monitoring the interface signal transferred between a host device and a subordinate device, and transferring a signal which can be generated intentionally by a system. CONSTITUTION:Start of recording an interface signal, its stop and halt, etc. are executed by providing a means, etc. for monitoring the interface signal transferred between a host device and a subordinate device, and transferring a signal which can be generated intentionally by a system. For instance, when disk devices 4-1, 4-2 are selected through a channel 2 by a central processor CPU1 and through disk controller DKC3, an interface operation of the channel 2 and the DKC3 is monitored by an interface monitor 10. Subsequently, the interface signal is decoded by a logic part 5, and in case when its contents are other than a prescribed code, it is stored in an external storage device 6 through a buffer part 7. |
