| 摘要 |
A display member, for example a visual display unit presents symbols which are divided into modules. Each module consists of a dot matrix. A refresh memory has one word for each module on the visual display unit. Out of the words in the refresh memory, which correspond to the modules of a symbol, one word contains a symbol code and the other words define the dot matrices of the modules. Control information in each word indicates if the word is a symbol code or a dot matrix. A code transformation memory is supplied with the symbol code and has a word at an address indicated by the symbol code, which word defines the dot matrix of the module in question. A selector forwards to the display member, in dependence on the control information, the word read from the refresh memory if the control information indicates that the word defines a dot matrix, and forwards the word read out from the code transformation memory if the control information indicates that the word read out from the refresh memory is a symbol code.
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