| 摘要 |
PURPOSE:To reduce the required time for transfer at error generation, by saving a head address from an address register to an address save register and saving the content of a count register at that time to a count save register. CONSTITUTION:An input and output device 5 outputs a save latch signal, every time the transfer of four data is finished from the transfer start point. When the device prepares for data and it is detected that the data block has an error, a list request signal is outputted from the device 5 in place of the data. A channel controlling section 301 receiving this signal outputs a switching signal and a count latch signal, and the content of an address save register 317 and a count save register 318 is latched to an address register 302 and a count register 303. The content of the registers 302, 303 represents the head data of the data block where the error is detected, then the transfer is retried from the state. |
