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Drive system for character generator

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专利汇可以提供Drive system for character generator专利检索,专利查询,专利分析的服务。并且PURPOSE: To enable the both operations of row or column scanning, by branching the address signal with the two outputs respectively selecting the row and column address.
CONSTITUTION: The character ROM 3 is connected to the decoders 4 and 5, and the decoders 4 and 5 are in accordance with the truth table. The selection circuit 6 has the function discriminating the row or column scanning. For example, the ROM address AB1 to 4 discriminate 0 to 7 or 8 to 15, and the output 6a is connected to the 2-1 data selectros 7 and 8. If AB1 to AB4 are 0 to 7, for example, 0,0,0,1, a to h lines are all active and j line is active. Thus, the second row of the letter R is obtained. Further, the letter R is established by changing AB1 to 4 to 0W7. Similarly, when AB 1 to 4 change as 8 to 15, j to p are all active and the data by column can be outputted by scanning a to h lines.
COPYRIGHT: (C)1979,JPO&Japio,下面是Drive system for character generator专利的具体信息内容。

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