| 摘要 |
In the data processing system a main memory is coupled to a communication controller by the system bus. The controller is coupled to the I/O devices for transfer of data bytes. The data bytes, address bytes, and control elements are stored by the controller in a shared memory. The tansfer of data bytes between the shared memory and requesting I/O device is effected by a line microprocessor. Signals from the line adapters in response to a poll, cause the line microprocessor to interrupt its operation.
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