| 摘要 |
PURPOSE:To reduce the load applied to the programs of a host processor and a processor part by providing a memory at a channel control part to store the buffer information and performing a command retrial based on the stored information in an overrun or underrun mode. CONSTITUTION:A memory GBKB 6 stores the obtained buffer information; while a memory ICBW 7 stores the IWC which is reported to a PC. Both memories 6 and 7 work while a command is executed respectively. thus the command retrial is attained without applying the load at all to the programs of a host processor and a CCP in case an overrun or an underrun is produced. Furthermore the overall processing capacity is improved for an information processing system. While no processing is applied to the reported ICW until the ICW (normal end, error end, etc.) of the end information is delivered in agreement with the program of the CCP. As a result, the same function is attained with no use of both memories ICWBC 7 and ICWBC 9. |
