US 4,051,457 AGranted

System for generating a character pattern

AssigneeHitachi, Ltd.

InventorsFumiyuki Inose, Kenji Fujikata, Norio Yokozawa

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Abstract

In a character displaying device having a character pattern memory which is made up of a circulating sequential access memory storing character patterns therein, a character pattern generating system comprises a high speed buffer memory which stores the character codes of one line or any other suitable amount of characters to be displayed and the corresponding character patterns, so that each time one character is delivered as an output from the character pattern memory, the presence of the character code of the particular character is examined for all the character codes of the buffer memory, and the character pattern of the particular character is written into the buffer memory when the character codes are coincident, the writing operations being sequentially executed in the order of the character outputs of the character pattern memory, thereby making it possible to finish all the character patterns in the buffer memory within a period in which the read-out of the character pattern memory circulates.

Claims9

Dependent claims

A character pattern generating system comprising

a character pattern memory which is made up of a circulating sequential access memory and which stores therein patterns of plural types of characters and information for discriminating character codes corresponding to the character patterns,
register means for temporarily storing a code and a pattern for each of the respective characters sequentially obtained from said character pattern memory,
buffer memory means having stored therein the codes of a plurality of characters to be displayed for receiving and storing the character patterns corresponding to said character codes in the order of the display,
coincidence means for comparing a character code stored in said register means with each of the respective character codes stored in said buffer memory means each time the character code from said character pattern memory is stored in said register means and for generating a coincidence output upon detecting coincidence therebetween,
storage control means for causing the character pattern of said register means to be stored in said buffer memory means in response to a coincidence output of said coincidence means, and
display means for displaying the character patterns of said buffer memory means when the character patterns corresponding to all of said character codes in said buffer memory means have been stored in said buffer memory means.

3 more elements

Dependencies are inferred from the claim text.