JPH01191931A - Crt display device - Google Patents

Crt display device

Info

Publication number
JPH01191931A
JPH01191931A JP63017651A JP1765188A JPH01191931A JP H01191931 A JPH01191931 A JP H01191931A JP 63017651 A JP63017651 A JP 63017651A JP 1765188 A JP1765188 A JP 1765188A JP H01191931 A JPH01191931 A JP H01191931A
Authority
JP
Japan
Prior art keywords
memory
transfer
screen
logical
display
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
JP63017651A
Other languages
Japanese (ja)
Inventor
Kimihiko Fukuda
福田　公彦
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP63017651A priority Critical patent/JPH01191931A/en
Publication of JPH01191931A publication Critical patent/JPH01191931A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To improve the performance of a CRT display device by transferring a screen image of a transfer unit changed in a logical screen memory via a DMA control part based on the transfer corresponding information on a table memory corresponding to the output transfer unit of a rewrite detecting circuit. CONSTITUTION:The software functions to calculate the transfer address relation between a logical screen memory 11 and a display screen memory 13 and registers this calculated relation into a table memory 16. Then the address areas whose logical windows are stored in the memory 11 are registered in a rewrite detecting circuit 15. Hereafter the circuit 15 detects a specific logical window that includes the relevant rewritten address in case the contents of the memory 11 are rewritten. Then the circuit 15 gives an instruction to a DMA control part 12 for start of the transfer of an area. Then the part 12 decides a specific area to be transferred from the information received from the circuit 15 and the contents the memory 16 corresponding to said information. Thus the transfer of data is carried out.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明はマルチウィンドウ表示機能を有するＣＲＴ表示
装置に関し、特に各ウィンドウの表示内容の更新方式に
関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a CRT display device having a multi-window display function, and more particularly to a method for updating the display contents of each window.

（従来の技術） 従来この種のＣＲＴ表示装置は第２図の構成となってい
た。この従来のＣＲＴ表示装置では、論理画面用メモリ
１１内の各論理画面が更新された場合、ソフトウェアが
ＤＭＡ制御部２２に転送指示を行なうことにより、ＤＭ
Ａ制御部２２が表示画面用メモリ１３内の表示内容の更
新を行なう様になっていた。(Prior Art) Conventionally, this type of CRT display device had the configuration shown in FIG. In this conventional CRT display device, when each logical screen in the logical screen memory 11 is updated, the software instructs the DMA control unit 22 to transfer the DM data.
The A control section 22 was designed to update the display contents in the display screen memory 13.

（発明が解決しようとする課題） 上述した従来のＣＲＴ表示装置では、各表示つイントウ
の内容更新をソフトウェアの制御で行う。(Problems to be Solved by the Invention) In the above-described conventional CRT display device, the contents of each display window are updated under software control.

ところが、この従来方式では、ウィンドウの数やその表
示状態によりその制御は複雑となり、結果として装置の
性能を低下させるという欠点があった。However, this conventional method has the disadvantage that its control becomes complicated depending on the number of windows and their display states, resulting in a decrease in the performance of the device.

（課題を解決するための手段） 前述の課題を解決するために本発明が提供する手段は、
複数の任意サイズの画面イメージを格納する論理画面用
メモリと、表示部に表示される画面イメージを格納する
表示画面用メモリと、前記２つのメモリ間の矩形画面イ
メージの転送を行なうＤＭＡ制御部とを有し、前記論理
画面用メモリ上の画面イメージを前記表示画面用メモリ
の任意位置へ転送することによりマルチウィンドウの制
御を行なうＣＲ７表示装置であって、任意サイズ矩形エ
リアを１つの転送単位とし、前記論理画面用メモリと表
示画面用メモリとの間の転送対応情報を格納するテーブ
ルメモリと、前記論理画面用メモリが書き換えられた場
合にどの転送単位の内容が変更されたかを検出する書換
え検出回路とを有し、前記ＤＭＡ制御部は、前記書換え
検出回路の出力の転送単位に対応する前記テーブルメモ
リ上の転送対応情報から、前記論理画面用メモリにおい
て変更された転送単位の画面イメージを転送することを
特徴とする。(Means for Solving the Problems) Means provided by the present invention to solve the above-mentioned problems are as follows:
a logical screen memory that stores a plurality of screen images of arbitrary sizes; a display screen memory that stores screen images to be displayed on the display unit; and a DMA control unit that transfers a rectangular screen image between the two memories. A CR7 display device which controls a multi-window by transferring a screen image on the logical screen memory to an arbitrary position in the display screen memory, wherein a rectangular area of arbitrary size is used as one transfer unit. , a table memory that stores transfer correspondence information between the logical screen memory and the display screen memory, and a rewrite detection unit that detects which transfer unit contents have been changed when the logical screen memory is rewritten. the DMA control unit transfers the screen image of the changed transfer unit in the logical screen memory from the transfer correspondence information on the table memory corresponding to the transfer unit of the output of the rewriting detection circuit. It is characterized by

（実施例） 次に本発明について図面を参照して一層詳しく説明する
。(Example) Next, the present invention will be described in more detail with reference to the drawings.

第１図は本発明の一実施例の構成を示すブロック図であ
る。ソフトウェアは表示画面上のウィンドウの表示状態
、重なり具合等により論理画面用メモリ１１と表示画面
用メモリ１３との転送アドレス関係を計算し、テーブル
メモリ１５を登録する０次に論理画面用メモリ１１内に
各論理ウィンドウが格納されているアドレスエリアを書
換検出回路１５に登録する。以後、論理画面用メモリ１
１内の内容が書換えられた場合、その書き換えられたア
ドレスがどの論理ウィンドウ内のものであるかを書肯え
検出回路１５が検出し、ＤＭＡ制御部１２へ転送の起動
を指示する。ＤＭＡ制御部１２は書換え検出回路１５か
らの情報とそれに対応したテーブルメモリ１６の内容と
から、どこのエリアを転送すべきか判断し、データの転
送を行なう、この様にして、本実施例では、論理画面用
メモリ１１の内容を更新すると、自動的にその変更内容
が表示画面用メモリ１３に転送され、結果として表示部
１４の表示内容が更新される。ソフトウェアは、表示画
面上のウィンドウの表示状態を変更する必要が生じた場
合テーブルメモリ１６の内容を変更する。FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. The software calculates the transfer address relationship between the logical screen memory 11 and the display screen memory 13 based on the display state of the windows on the display screen, the degree of overlap, etc., and registers the table memory 15 in the logical screen memory 11. The address areas in which each logical window is stored are registered in the rewrite detection circuit 15. From now on, logical screen memory 1
When the content in 1 is rewritten, the acknowledgment detection circuit 15 detects which logical window the rewritten address is in, and instructs the DMA control unit 12 to start the transfer. The DMA control unit 12 determines which area should be transferred based on the information from the rewrite detection circuit 15 and the contents of the table memory 16 corresponding thereto, and transfers the data.In this way, in this embodiment, When the contents of the logical screen memory 11 are updated, the changed contents are automatically transferred to the display screen memory 13, and as a result, the display contents of the display section 14 are updated. The software changes the contents of the table memory 16 when it becomes necessary to change the display state of a window on the display screen.

（発明の効果） 以上に説明した様に、本発明のＣＲ７表示装置は、論理
画面イメージを表示画面へ転送するのに、論理画面イメ
ージの変更を検知し、その変更のあったエリアをソフト
ウェア制御なしに表示画面用メモリに転送する。このよ
うに、本発明によれば表示画面制御のソフトウェアの負
荷が軽く、ひいては性能の高いＣＲ７表示装置を提供で
きる。(Effects of the Invention) As explained above, the CR7 display device of the present invention detects a change in the logical screen image to transfer the logical screen image to the display screen, and controls the area where the change has occurred by software control. Transfer to display screen memory without any need. As described above, according to the present invention, it is possible to provide a CR7 display device with a light load on software for display screen control and high performance.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例の構成を示すブロック図であ
り、第２図は従来のＣＲ７表示装置の構成を示すブロッ
ク図である。 １１・・・論理画面用メモリ、１２・・・ＤＭＡ制御部
、１３・・・表示画面用メモリ、１４・・・表示部、１
５・・・書換え検出回路、１６・・・テーブルメモリ、
２２・・・ＤＭＡ制御部。FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a block diagram showing the configuration of a conventional CR7 display device. DESCRIPTION OF SYMBOLS 11... Memory for logical screen, 12... DMA control section, 13... Memory for display screen, 14... Display section, 1
5... Rewriting detection circuit, 16... Table memory,
22...DMA control section.

Claims (1)

【特許請求の範囲】[Claims] 複数の任意サイズの画面イメージを格納する論理画面用
メモリと、表示部に表示される画面イメージを格納する
表示画面用メモリと、前記２つのメモリ間の矩形画面イ
メージの転送を行なうＤＭＡ制御部とを有し、前記論理
画面用メモリ上の画面イメージを前記表示画面用メモリ
の任意位置へ転送することによりマルチウィンドウの制
御を行なうＣＲＴ表示装置において、任意サイズ矩形エ
リアを１つの転送単位とし、前記論理画面用メモリと表
示画面用メモリとの間の転送対応情報を格納するテーブ
ルメモリと、前記論理画面用メモリが書き換えられた場
合にどの転送単位の内容が変更されたかを検出する書換
え検出回路とを有し、前記ＤＭＡ制御部は、前記書換え
検出回路の出力の転送単位に対応する前記テーブルメモ
リ上の転送対応情報から、前記論理画面用メモリにおい
て変更された転送単位の画面イメージを転送することを
特徴とするＣＲＴ表示装置。a logical screen memory that stores a plurality of screen images of arbitrary sizes; a display screen memory that stores screen images to be displayed on the display unit; and a DMA control unit that transfers a rectangular screen image between the two memories. In a CRT display device that controls a multi-window by transferring a screen image on the logical screen memory to an arbitrary position in the display screen memory, a rectangular area of any size is taken as one transfer unit, and the a table memory that stores transfer correspondence information between the logical screen memory and the display screen memory; and a rewrite detection circuit that detects which transfer unit contents have been changed when the logical screen memory is rewritten. The DMA control unit is configured to transfer a screen image of the changed transfer unit in the logical screen memory from transfer correspondence information on the table memory corresponding to the transfer unit of the output of the rewrite detection circuit. A CRT display device characterized by:
JP63017651A 1988-01-28 1988-01-28 Crt display device Pending JPH01191931A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63017651A JPH01191931A (en) 1988-01-28 1988-01-28 Crt display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63017651A JPH01191931A (en) 1988-01-28 1988-01-28 Crt display device

Publications (1)

Publication Number Publication Date
JPH01191931A true JPH01191931A (en) 1989-08-02

Family

ID=11949758

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63017651A Pending JPH01191931A (en) 1988-01-28 1988-01-28 Crt display device

Country Status (1)

Country Link
JP (1) JPH01191931A (en)

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