| 摘要 |
A system for causing a device such as a printer to receive data from an external device such as a host computer, the system allowing the printer to automatically set not only a pattern for outputting an acknowledge signal (ACK) and a busy signal (BUSY) but also the capacity of a receiving buffer so as to match the external device, so that efficient data reception can be made, thereby freeing the external device at an early stage of the data reception.
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