| 摘要 |
A serial pattern generator circuit for serially outputting a bit pattern corresponding to one line received in parallel from a character generator and, in response to a predetermined control signal, generating the serial bit pattern with an inverted bit sequence is disclosed. A combining circuit is provided for combining an output of the serial pattern generator circuit with a video signal of a displayed video image. A mirror image signal generator circuit responsive to an output signal of the combining circuit and the control signal is provided in order to generate a mirror image signal.
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