JPS60221792A - Character generation circuit - Google Patents

Character generation circuit

Info

Publication number
JPS60221792A
JPS60221792A JP60054449A JP5444985A JPS60221792A JP S60221792 A JPS60221792 A JP S60221792A JP 60054449 A JP60054449 A JP 60054449A JP 5444985 A JP5444985 A JP 5444985A JP S60221792 A JPS60221792 A JP S60221792A
Authority
JP
Japan
Prior art keywords
character
memory
generation circuit
display
ram
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP60054449A
Other languages
Japanese (ja)
Inventor
鈴木　勇次
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP60054449A priority Critical patent/JPS60221792A/en
Publication of JPS60221792A publication Critical patent/JPS60221792A/en
Pending legal-status Critical Current

Links

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

【発明の詳細な説明】 〔発明の利用分野〕 漢字表示パターンは、共通化の道をたどり、今やＪＩＳ
化の機運にあり、近い将来漢字表示パターン出力素子と
してマスクＲＯＭが出現する。そこで本発明は、該マス
クＲＯＭを使用した文字表示装置の文字発生回路に好適
な手段を提供するものである。[Detailed Description of the Invention] [Field of Application of the Invention] Kanji display patterns have followed the path of standardization and are now standardized in JIS.
In the near future, mask ROMs will appear as kanji display pattern output devices. Therefore, the present invention provides suitable means for a character generation circuit of a character display device using the mask ROM.

〔発明の背景〕[Background of the invention]

従来の文字表示装置の文字発生回路は、アルファニー−
メリック文字の場合、パターンが共通化しておりマスク
ＲＯＭが主であった。しかし漢字の場合、現在は、表示
パターンが共通化されていない為、全てＲＡＭを使用し
ている。The character generation circuit of the conventional character display device is
In the case of Merrick characters, the pattern was common and mask ROM was the main type. However, in the case of kanji, all display patterns are currently not standardized, so RAM is used for all of them.

しかしパターンがＪＩＳ化された場合、マスクＲ，ＯＭ
が出現し該素子が使用される。アルファニー−メリック
文字同様漢字もマスクＩ（ＯＭのみを主体として回路を
構成した場合、文字パターンの変更は容易でなくなる。However, if the pattern is JIS, the mask R, OM
appears and the element is used. Similar to Alphany-Merrick characters, Kanji characters cannot be easily changed if a circuit is constructed using only Mask I (OM) as the main character.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、安価な文字表示装置に寄与するマスク
Ｒ，ＯＭを使用し、簡単で且つ安価な回路を付加し、回
路に柔軟性を持たせ漢字表示パターンの変更を容易にし
、欠陥マスクＩ（ＯＭの救済も可能にする文字発生回路
を提供することにある。The purpose of the present invention is to use masks R and OM that contribute to an inexpensive character display device, add a simple and inexpensive circuit, provide flexibility to the circuit, make it easy to change the kanji display pattern, and mask defects. The object of the present invention is to provide a character generation circuit that also enables relief of I(OM).

〔発明の概要〕[Summary of the invention]

本発明は、漢字の変更パターンを予めメモリに登録して
おき、電源投入時及びオペレータ操作等によりＲＡＭに
表示パターンをロードする方式と変更不要の表示パター
ンは、マスクＲＯＭから出力する文字発生回路である。The present invention has a system in which a change pattern of kanji is registered in memory in advance, and the display pattern is loaded into RAM when the power is turned on or by operator operation, etc., and a character generation circuit that outputs display patterns that do not need to be changed from a mask ROM. be.

ＲＡＭへのｐ−ド方法には、他にも上位装置からの指令
等もあるが本発明では、ロード方法には特に限定したも
のではない。又メモリにもフロッピーディスク、ディス
ク等も考えられるが本発明では、特に限定したものでは
ない。There are other methods for loading data into the RAM, such as commands from a host device, but the present invention is not particularly limited to the loading method. The memory may also be a floppy disk, a disk, etc., but is not particularly limited in the present invention.

〔発明の実施例〕[Embodiments of the invention]

以下図面を引用し、発明の一実施例詳細について説明す
る。第２図に示す数字ゼロの表示パターンを例とし第１
図の発明を説明する。ゼロ１つのパターンは、ＲＯＭＢ
に、表示変更パターンゼロ１２は、メモリ６に記憶され
ているものとする。文字発生回路の電源投入時等、メモ
リ６からアドレスレジスタ４とデータレジスタ５を介し
てＲＡＭ　７にゼ０１２の表示パターンをロードする。The details of one embodiment of the invention will be described below with reference to the drawings. Using the display pattern of the number zero shown in Figure 2 as an example, the first
The invention of the figure will be explained. One zero pattern is ROMB
It is assumed that display change pattern zero 12 is stored in the memory 6. When the character generation circuit is powered on, a display pattern of 012 is loaded from the memory 6 to the RAM 7 via the address register 4 and data register 5.

画面メモリ１から１文字バッファ２に読み出すタイミン
グとアドレスレジスタ４から比較回路３に読み出すタイ
ミングは、同じとする。It is assumed that the timing of reading from the screen memory 1 to the one-character buffer 2 and the timing of reading from the address register 4 to the comparison circuit 3 are the same.

数字ゼロを表示する為画面メモリ１からアドレスｍｎを
１文字バッファ２に読み出し、且つアドレスレジスタ４
からもアドレスｍｎが読み出される為、比較回路３によ
り２２によりＲＡＭ　７が選択され表示パターンゼロ１
２がＲＡＭ７より並列データとして出力され、並直列変
換回路９により直列データとなり、表示装置１０の走査
線の動きに同期してゼロ１２のパターンが表示される。To display the number zero, address mn is read from screen memory 1 to character buffer 2, and address register 4 is read.
Since the address mn is also read from , RAM 7 is selected by comparator circuit 3 and display pattern zero 1
2 is output as parallel data from the RAM 7, converted into serial data by the parallel-to-serial conversion circuit 9, and a pattern of zeros and 12 is displayed in synchronization with the movement of the scanning lines on the display device 10.

他のパターンについては、２１を介し、ＲＯＭ８より出
力表示される。Other patterns are output and displayed from the ROM 8 via 21.

本実施例によれば、表示パターンの任意変更は、予めメ
モリ６に登録しておくことにより容易である。メモリ６
に使用する素子は、フロッピーディスク、ディスク等何
であっても良い。According to this embodiment, arbitrary changes in the display pattern can be easily made by registering them in the memory 6 in advance. memory 6
The element used for this may be any device such as a floppy disk or a disk.

又メモリ６からＲＡＭ７にロードする手段は、上位装置
からの指令及びオペレータ操作等何であっても良い。Further, the means for loading data from the memory 6 to the RAM 7 may be any method such as a command from a host device or an operator's operation.

〔発明の効果〕〔Effect of the invention〕

本発明によれば顧客ニーズの表示パターン変性の向上も
可能である。According to the present invention, it is also possible to improve display pattern modification according to customer needs.

【図面の簡単な説明】[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
図説明用の表示ノ＜ターン図である。 １・・・画面メモリ、　２・・・１文字ノくツファ、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・、、　ＲＡ　
Ｍ、　８・・・ＲＯＭ％９・１．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／＜ターン、！１・・・アドレス不一致Ｊ
２・・・アドレス一致。 オ　１　図 才　２　図 α〜／２Figure 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 turn diagram for illustration purposes. 1...Screen memory, 2...1 character number, 3
...Comparison circuit, 4...Address register, 5...
・Data register, 6...Memory, 7..., RA
M, 8...ROM%9.1. Parallel-to-serial conversion circuit, 10
... Display device, 11... Basic display pattern, 12.
・・Display change/＜Turn,! 1...Address mismatch J
2...Address match. O 1 Illustration 2 Illustration α~/2

Claims (1)

【特許請求の範囲】[Claims] １、　画面メモリと文字パターン発生用Ｒ，ＯＭ及び表
示部から成る文字表示装置に於いて、文字パターン発生
用ＲＡＭと文字パターン変更情報を蓄えるメモリとアド
レス比較回路を付加し７電源投入時及びオペレータ操作
等により、該メモリから該ＲＡＭに文字パターンデータ
なロードすることにより文字表示の際、ＲＯＭとＲ，Ａ
Ｍのいずれか一方より文字パターンデータを出力するこ
とを特徴とした文字発生回路。1. In a character display device consisting of a screen memory, R, OM for character pattern generation, and a display section, a RAM for character pattern generation, a memory for storing character pattern change information, and an address comparison circuit are added. By loading character pattern data from the memory to the RAM by operation etc., when displaying characters, the ROM, R, A
A character generation circuit characterized in that character pattern data is output from either one of M.
JP60054449A 1985-03-20 1985-03-20 Character generation circuit Pending JPS60221792A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60054449A JPS60221792A (en) 1985-03-20 1985-03-20 Character generation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60054449A JPS60221792A (en) 1985-03-20 1985-03-20 Character generation circuit

Publications (1)

Publication Number Publication Date
JPS60221792A true JPS60221792A (en) 1985-11-06

Family

ID=12971006

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60054449A Pending JPS60221792A (en) 1985-03-20 1985-03-20 Character generation circuit

Country Status (1)

Country Link
JP (1) JPS60221792A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63282787A (en) * 1987-05-15 1988-11-18 株式会社日立製作所 Document editing apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52153632A (en) * 1976-06-16 1977-12-20 Toshiba Corp Memory correction system
JPS5482933A (en) * 1977-12-15 1979-07-02 Fujitsu Ltd Circuit system altering part of content of character generator
JPS5688194A (en) * 1979-12-19 1981-07-17 Ricoh Kk Character display control system for display control circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52153632A (en) * 1976-06-16 1977-12-20 Toshiba Corp Memory correction system
JPS5482933A (en) * 1977-12-15 1979-07-02 Fujitsu Ltd Circuit system altering part of content of character generator
JPS5688194A (en) * 1979-12-19 1981-07-17 Ricoh Kk Character display control system for display control circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63282787A (en) * 1987-05-15 1988-11-18 株式会社日立製作所 Document editing apparatus

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