DE2847389A1 - Screen of VDU with fields subdivided in 7 by 9 matrix - reduces storage needs and has two stores for symbol addresses of rows for interrogation generator - Google Patents
Screen of VDU with fields subdivided in 7 by 9 matrix - reduces storage needs and has two stores for symbol addresses of rows for interrogation generatorInfo
- Publication number
- DE2847389A1 DE2847389A1 DE19782847389 DE2847389A DE2847389A1 DE 2847389 A1 DE2847389 A1 DE 2847389A1 DE 19782847389 DE19782847389 DE 19782847389 DE 2847389 A DE2847389 A DE 2847389A DE 2847389 A1 DE2847389 A1 DE 2847389A1
- Authority
- DE
- Germany
- Prior art keywords
- character
- addresses
- fields
- rows
- symbol
- 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.)
- Withdrawn
Links
Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
- G09G1/02—Storage circuits
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/22—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of characters or indicia using display control signals derived from coded signals representing the characters or indicia, e.g. with a character-code memory
- G09G5/24—Generation of individual character patterns
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Darstellung vonThe invention relates to a method for displaying
Zeichen mit einem Datensichtgerät, dessen Bildschirm in einzelne Zeichenfelder unterteilt ist, von denen jedes vorzugsweise 7 x 9 matrixförmig angeordnete Bildpunkte enthält.Characters with a data display device, whose screen is divided into individual character fields is subdivided, each of which is preferably 7 x 9 pixels arranged in the form of a matrix contains.
Bei der Darstellung von Symbolen und Zeichen ist es zur Reduzierung des Speicherbedarfs bekannt, (z.B. DT-OS 24 12 885) den Bildschirm in Zeichenfelder zu unterteilen, von denen jedes einzeln adressierbar ist. Jedes dieser Zeichenfelder enthält wiederum eine Vielzahl von Bildpunkten, die ihrerseits zu Zeilen und Spalten zusammengefaßt sind. Ublicherweise besteht ein derartiges Zeichenfeld aus sieben Spalten und neun Zeilen, so daß sich ein 7 x 9-Bildpunktmatrix ergibt.When displaying symbols and signs, it is used to reduce the memory requirement is known (e.g. DT-OS 24 12 885) the screen in character fields to subdivide, each of which is individually addressable. Each of these character fields in turn contains a large number of pixels, which in turn form rows and columns are summarized. Such a character field usually consists of seven Columns and nine rows, so that there is a 7 x 9 pixel matrix.
Bei 7 x 9-Zeichenfeldern ist zur Speicherung der einzelnen Zeichenzeilen ein Speicher mit einer Kapazität von 16 x 7 Bit erforderlich, von dessen 16 Speicherplätzen allerdings nur 9 ausgenutzt werden. Ist zur Adressierung des Zeichengenerators ein 8-Bit Bildwiederholungsspeicher eingesetzt, so sind im Zeichengenerator 256 x 16 = 4096 Worte zum Betrieb der Anlage erforderlich.In the case of 7 x 9 character fields, the individual character lines are stored a memory with a capacity of 16 x 7 bits is required, of which 16 memory locations however, only 9 are exploited. Is on for addressing the character generator 8-bit image repetition memory is used, the character generator has 256 x 16 = 4096 words required to operate the system.
Der vorliegenden Erfindung lag die Aufgabe zugrunde, insbesondere für Datensichtanlagen mit einem 7 x 9-Bildpunktraster ein einfaches Verfahren zur Reduzierung der erforderlichen Speicherkapazität zu schaffen.The present invention was based on the object, in particular for data display systems with a 7 x 9 pixel grid a simple method for Reduction of the required storage capacity to create.
Erfindungsgemäß ist diese Aufgabe dadurch gelöst, daß eine Zeichenadresse zwei Speichern zugeführt wird, daß in dem ersten Speicher die Zeilen 0 ... 7 aller Zeichenfelder abgelegt sind, daß der zweite Speicher die weiteren Zeilen aller Zeichenfelder beinhaltet und daß beide Speicher durch Zeichenadressen und Zeichenzeilenadressen abgefragt werden.According to the invention, this object is achieved in that a character address two memories is supplied that in the first memory the lines 0 ... 7 of all Character fields are stored that the second memory the other lines of all character fields and that both memories by character addresses and character line addresses be queried.
Das Verfahren ist nachfolgend anhand eines in Fig. 1 und Fig. 2 der Zeichnung dargestellten Ausführungsbeispiels näher erläutert.The method is shown below with reference to one of FIGS. 1 and 2 of FIG Drawing illustrated embodiment explained in more detail.
Es zeigen: Fig. 1 zwei Zeichenfelder, Fig. 2 ein Blockschaltbild.They show: FIG. 1 two character fields, FIG. 2 a block diagram.
In Fig. 1 sind mit ZA Zeichenadressen, mit ZZA Zeichenzeilenadressen und mit ZF 7 x 9-Zeichenfelder bezeichnet. Jedes Zeichenfeld ZF besteht aus neun Zeilen, von denen jede sieben Bildpunkte BP umfaßt. Soll beispielsweise das obere Zeichenfeld ZF mit der Zeichenadresse ZA = 0 auf einen Bildschirm dargestellt werden, so gelangt ein entsprechender Befehl ZA an zwei in Fig. 2 mit Sl und S2 bezeichnete Speicher. Im Speicher S1 sind auf 256 Speicherplätzen jeweils acht Codewörter gespeichert, die durch den Befehl ZZA (2 ... 22) ausgegeben werden. Der Speicher S1 muß daher über eine Kapazität von 256 x 8 = 2048 Worten bzw. 2 K-Worte verfügen. Mit Hilfe des Speichers S1 werden also die Zeilen ... 7 des Zeichenfeldes ZF dargestellt.In Fig. 1, ZA indicates character addresses, ZZA indicates character line addresses and labeled ZF 7 x 9 character fields. Each character field ZF consists of nine Lines each of which comprises seven pixels BP. For example, should the upper Character field ZF with the character address ZA = 0 can be displayed on a screen, so a corresponding command ZA arrives at two designated in FIG. 2 with S1 and S2 Storage. Eight code words are stored in 256 memory locations in memory S1, which are output by the command ZZA (2 ... 22). The memory S1 must therefore have a capacity of 256 x 8 = 2048 words or 2 K words. With help of In memory S1, the lines ... 7 of the character field ZF are displayed.
Neben dem Speicher S1 wird durch die Zeichenadresse ZA ein zweiter Speicher S2 adressiert, in dem auf 256 Speicherplätzen jeweils die neunte Zeile des adressierten Zeichenfeldes ZF gespeichert ist. Die Kapazität des Speichers S2 umfaßt daher 256 x 1 = 256 Worte bzw. 1/4 K-Worte.In addition to the memory S1, a second one is created by the character address ZA Addressed memory S2, in which the ninth line in each case on 256 memory locations of the addressed character field ZF is stored. The capacity of the memory S2 therefore comprises 256 x 1 = 256 words or 1/4 K words.
Beide Speicher S1, S2 zusammen haben also eine Kapazität von 2304 Worten bzw. 2 1/4 K-Worten. Im Vergleich zu bekannten Verfahren, bei denen noch 4096 Speicherplätze erforderlich waren, wird bei dem beschriebenen Verfahren der Speicherbedarf nahezu auf die Hälfte reduziert, was zu einer erheblichen Kosteneinsparung führt.Both memories S1, S2 together therefore have a capacity of 2304 Words or 2 1/4 K words. Compared to known methods where still 4096 memory locations were required, the Storage requirements reduced by almost half, resulting in significant cost savings leads.
Da bei der Ausübung des Verfahrens kein zusätzlicher Steuerungsaufwand entsteht, ist es ohne weiteres in allen bestehenden Datensichtanlagen anwendbar. Das beschriebene Verfahren bietet die gleichen Vorteile, wenn die darzustellenden Zeichen über mehr als neun Zeilen verfügen.Since there is no additional control effort when performing the procedure arises, it can easily be used in all existing data display systems. The method described offers the same advantages if the one to be represented Characters have more than nine lines.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19782847389 DE2847389A1 (en) | 1978-11-02 | 1978-11-02 | Screen of VDU with fields subdivided in 7 by 9 matrix - reduces storage needs and has two stores for symbol addresses of rows for interrogation generator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19782847389 DE2847389A1 (en) | 1978-11-02 | 1978-11-02 | Screen of VDU with fields subdivided in 7 by 9 matrix - reduces storage needs and has two stores for symbol addresses of rows for interrogation generator |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2847389A1 true DE2847389A1 (en) | 1980-05-08 |
Family
ID=6053588
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19782847389 Withdrawn DE2847389A1 (en) | 1978-11-02 | 1978-11-02 | Screen of VDU with fields subdivided in 7 by 9 matrix - reduces storage needs and has two stores for symbol addresses of rows for interrogation generator |
Country Status (1)
Country | Link |
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DE (1) | DE2847389A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0056081A1 (en) * | 1980-12-23 | 1982-07-21 | Siemens Aktiengesellschaft | Method and device for reducing the required memory of sequences of binary signals describing characters or graphical patterns in character generators |
-
1978
- 1978-11-02 DE DE19782847389 patent/DE2847389A1/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0056081A1 (en) * | 1980-12-23 | 1982-07-21 | Siemens Aktiengesellschaft | Method and device for reducing the required memory of sequences of binary signals describing characters or graphical patterns in character generators |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee |