JPS63139645U

JPS63139645U -

Info

Publication number: JPS63139645U
Application number: JP1987032183U
Authority: JP
Priority date: 1987-03-05
Filing date: 1987-03-05
Publication date: 1988-09-14

Description

[Brief explanation of the drawing]

第１図は本考案を実施したマルチウインドウ表
示装置の構成図、第２図ａ，ｂは本考案装置のｘ
，ｙ軸計数制御部６，７の詳細な構成を表わす図
、第３図ａ，ｂ，ｃ，ｄは本考案装置を用いた場
合の画面処理の概念を表わす図、第４図ａ，ｂ，
ｃは従来のマルチウインドウ表示動作を表わす図
である。１……フレームメモリ、２……同期信号発生部
、２_１……Ｘカウンタ、２_２……Ｙカウンタ、３
……シフトレジスタ、４……ＣＲＴ表示装置、５
……一致検出回路、６……ｘ軸計数制御部、７…
…ｙ軸計数制御部、６Ｒ，７Ｒ……ウインドウ・
レジスタ、６_１〜６ｍ，７_１〜７ｎ……計数分配
器、ｘ_１〜ｙｍ，ｘ_１〜ｙｎ……計数器。 Fig. 1 is a block diagram of a multi-window display device embodying the present invention, and Fig. 2 a and b are x of the device of the present invention.
, Fig. 3 a, b, c, and d are views showing the concept of screen processing when using the device of the present invention, Fig. 4 a, b ，
c is a diagram showing a conventional multi-window display operation. 1...Frame memory, 2...Synchronization signal generator, 2 ₁ ...X counter, 2 ₂ ...Y counter, 3
...Shift register, 4...CRT display device, 5
...Coincidence detection circuit, 6...x-axis counting control section, 7...
...Y-axis counting control section, 6R, 7R...Window
Register, 6 ₁ to 6m, 7 ₁ to 7n... Count distributor, x ₁ to ym, x ₁ to yn... Counter.

Claims

[Scope of utility model registration request]

In a multi-window display device that converts the contents of a frame memory in which image data is stored into a display signal and performs multi-window display on a CRT device, it is necessary to check whether the raster display signal matches the background color signal of the currently displayed display screen. It has a coincidence detection circuit to detect and a register for holding the size of the newly set window in the x-axis direction, and counts the coincidence signals of the coincidence detection circuit by a counter provided corresponding to the x-axis coordinate value. an x-axis counting control unit that sets the x-axis coordinate value corresponding to the counter having the maximum count value as the x-coordinate of the newly set window display; and holds the size of the newly set window in the y-axis direction. The coincidence signal of the coincidence detection circuit is counted by a counter provided corresponding to the y-axis coordinate value, and the y-axis coordinate value corresponding to the counter having the maximum count value is set as the new one. A multi-window display device having a y-axis counting control unit that determines the y-coordinate of window display.