JPS6466693A - Display device - Google Patents
Display deviceInfo
- Publication number
- JPS6466693A JPS6466693A JP62223445A JP22344587A JPS6466693A JP S6466693 A JPS6466693 A JP S6466693A JP 62223445 A JP62223445 A JP 62223445A JP 22344587 A JP22344587 A JP 22344587A JP S6466693 A JPS6466693 A JP S6466693A
- Authority
- JP
- Japan
- Prior art keywords
- output
- address
- character
- cpu
- raster
- 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
Links
Landscapes
- Digital Computer Display Output (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
PURPOSE: To eliminate screen disturbance by switching the character code of VRAM output and the raster address of CRTC output to those specified and latched by CPU and inputting them during one display cycle period on the character generation address. CONSTITUTION: The character code of VRAM 2 output and the raster address of CRTC 1 output are switched to the character code and the raster address of a latch 5 output holding CPU output data, by switches 7, 8 through a signal synchronized with the control clock of CRTC, with the switched output inputted in the address of a character generator 3. In addition, the output font data of the character generator 3 is latched by a data buffer 9 with timing corresponding to the code and raster specified by CPU, and outputted to CPU pass. The output font data of the character generator 3 is outputted as a VIDEO signal in a P/S conversion circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62223445A JPS6466693A (en) | 1987-09-07 | 1987-09-07 | Display device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62223445A JPS6466693A (en) | 1987-09-07 | 1987-09-07 | Display device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6466693A true JPS6466693A (en) | 1989-03-13 |
Family
ID=16798251
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62223445A Pending JPS6466693A (en) | 1987-09-07 | 1987-09-07 | Display device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6466693A (en) |
-
1987
- 1987-09-07 JP JP62223445A patent/JPS6466693A/en active Pending
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