JPS5865090U

JPS5865090U - Character generation circuit

Info

Publication number: JPS5865090U
Application number: JP15834481U
Authority: JP
Inventors: 鈴木　勇次
Original assignee: 株式会社日立製作所
Priority date: 1981-10-26
Filing date: 1981-10-26
Publication date: 1983-05-02

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は、文字発生回路のブロック図、第２図は、第１
図説明用の表示パターン図である。１・・・画面メモリ、２・・・１文字バッファ、３・・
・比較回路、４・・・アドレスレジスタ、５・・・デー
タレジスタ、６・・・メモリ、７・・・ＲＡＭ、ｆ３・
・・ＲＯＭ、９・・・並直列変換回路、１０・・・表示
装置、１１・・・基本表示パターン、１２・・・表示変
更パタニン、１１・・・アドレス不一致、１２・・・ア
ドレス一致。Figure 1 is a block diagram of the character generation circuit, and Figure 2 is the block diagram of the character generation circuit.
It is a display pattern diagram for illustration. 1...Screen memory, 2...1 character buffer, 3...
・Comparison circuit, 4...Address register, 5...Data register, 6...Memory, 7...RAM, f3・
ROM, 9... Parallel-serial conversion circuit, 10... Display device, 11... Basic display pattern, 12... Display change pattern, 11... Address mismatch, 12... Address match.

Claims

[Scope of utility model registration request]

A character display device consisting of a screen memory, a ROM for character pattern generation, and a display section is equipped with a RAM for character pattern generation, a memory for storing character pattern change information, and an address comparison circuit.
A character generation circuit characterized in that, by loading character pattern data from the memory to the RAM, character pattern data is output from either the ROM or the RAM when displaying characters.