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采用多位数据总线结构,实行数据总线和地址总线的分离,配以相对应的储存空间结构的字库存储器,就能很方便地完成汉字或图案点阵信息的储存、显示操作。这是作者在完成小型系列广告机(包括静态、动态只读显示器及相配的专用汉字与图案编程器以及带字库的动态显示器)之后的深刻体会。作者仅采用了数量有限的中、大规模数字集成电路构成的较简单电路,就轻而易举地完成了14×16点阵汉字和16×16点阵图案的储存和显示。这里汉字采用14×16点阵结构是考虑到汉字显示时的间隙和图案连续性的兼容。就目前的计算机或单片机所构成的中文点阵显示器和打字机而言,采用的都是单片8位数据存储器构成的字库,读出操作必须按照单个字节逐个读出的顺序。由于每个字节都有确定的地址,同时8位数据总线又兼作低8位地址线,因此无论是16×16或24×24点阵,包括
The use of multi-bit data bus structure, the implementation of data bus and address bus separation, coupled with the corresponding storage structure of the font memory, you can easily complete the Chinese character or pattern lattice information storage, display operation. This is the author’s deep experience after completing a series of small-format advertising machines, including static, dynamic read-only displays, matched Chinese characters and pattern programmers, and dynamic displays with fonts. The author has just completed the storage and display of 14 × 16 dot matrix Chinese characters and 16 × 16 dot patterns with only a relatively simple circuit consisting of a limited number of medium and large scale digital integrated circuits. Here the Chinese character 14 × 16 dot matrix structure is to take into account the Chinese characters show the gap and continuity of the pattern compatible. For the current Chinese dot-matrix displays and typewriters formed by a computer or a single chip microcomputer, all of the fonts are composed of a single 8-bit data memory, and the read operation must be read out one by one according to a single byte. Since each byte has a definite address and the 8-bit data bus also doubles as the lower 8-bit address lines, either the 16 × 16 or 24 × 24 dot matrix includes