| 摘要 |
PURPOSE:To make a data transfer speed to maximum at each interface to take out optionally a necessary data and to process in parallel with other process by providing a channel data storing memory to a channel adaptor. CONSTITUTION:A channel data storing memory 8 is installed which is used as a data buffer of channel data communicated between a channel adaptor 5 and a channel interface 1. The memory 8 can be accessed by a microprocessor MPU2 quite the same as a memory 4. Namely, by sending an address of the memory 8 given beforehand to a MPU bus 3, the data at the address position in the memory 8 can be inputted and outputted at a certain bit unit. Thus, since each data transfer speed between an interface and the MPU bus 3 will not be influenced to each other, the data transfer speed at respective interfaces goes to maximum, only the necessary data can be outputted optionally and the process in parallel with other process can be executed. |
