JPS60128393U

JPS60128393U - Video memory control device

Info

Publication number: JPS60128393U
Application number: JP1521784U
Authority: JP
Inventors: 清岩井; 鈴木　十士
Original assignee: 日本ボードコンピュータ株式会社
Priority date: 1984-02-06
Filing date: 1984-02-06
Publication date: 1985-08-28

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 drawings]

第１図は、パーソナルコンピュータよりＣＲＴディスプ
レイに出力されている映像データ信号を本考案装置を介
して映像メモリへ記憶させる場合のブロック図である。第２図は、本考案装置の構成の具体例を周辺装置との接
続において示すブロック図である。第３図は、ＣＲＴ画
面の有効画面範囲とラスター範囲を示すＣＲＴ画面の正
面図である。第４図は、原画像の内から映像メモリへ記
憶させようとする画面部分を示す図である。第５図は、
垂直又は水平同期信号と映像輝度信号それぞれの波形図
である。FIG. 1 is a block diagram when a video data signal output from a personal computer to a CRT display is stored in a video memory via the device of the present invention. FIG. 2 is a block diagram showing a specific example of the configuration of the device of the present invention in connection with peripheral devices. FIG. 3 is a front view of the CRT screen showing the effective screen range and raster range of the CRT screen. FIG. 4 is a diagram showing a screen portion of the original image to be stored in the video memory. Figure 5 shows
FIG. 3 is a waveform diagram of a vertical or horizontal synchronization signal and a video luminance signal.

Claims

[Scope of utility model registration request]

In a video memory control device that inputs the video data signal of the original image, performs data processing, and then stores it in the video memory, the number of vertical rows and the horizontal prime number of the starting point of the image part to be stored in the video memory are respectively determined. A vertical coordinate register 1 and a horizontal coordinate register 2 for setting, and a vertical line number register 3 for setting the vertical and horizontal sizes of the image portion, respectively.
and a horizontal pixel number register 4, and a vertical coordinate counter 1' provided corresponding to each register.
, horizontal coordinate counter 2', vertical line number counter 3
', a horizontal pixel number counter 4', and counts the number of pixels and rows from the data input signal of the original image with each of the counters, and compares it with the set value of each of the corresponding registers. A video memory control device characterized in that a signal defining the position and size of an image portion of an image to be stored in the video memory is sent to the video memory.