| 摘要 |
This device forms a parallel printer interface circuit for a serial bus and is composed of: a data buffer which buffers for the data interface of the serial bus; an EPROM which is accessed by the parallel address of the serial bus; a latch which latches data to the printer side; a printer buffer; a data bus which inputs and outputs data; a PAL which emits generating signals by decoding control signals and sends/receives perception signals; and a flip-flop which emits interrupt signals to the serial bus depending on printer perception signals.
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