| 摘要 |
PURPOSE:To shorten a time to occupy a data bus by one adaptor in one time of data transfer, by providing a burst control register in each adaptor. CONSTITUTION:In a communication control processor (CCP) provided with plural adaptors 3, the burst control register 36 is provided in each adaptor. In this way, the data transfer by one adaptor and a cycle steal in a main storage unit (MSU) 1 is divided to several number of times of data transfer corresponding to the number of bytes instructed by the burst control register 36, and a data bus in the said communication control processor is released. Therefore, it is possible to shorten the time to occupy the data bus by one adaptor in one time of data transfer. In this way, it is possible to decentralize a load on a microprogram in the adaptor, and the availability of the data bus, and to realize efficient communication control processing. |
