JPS54137931A - Picture display unit - Google Patents
Picture display unitInfo
- Publication number
- JPS54137931A JPS54137931A JP4628478A JP4628478A JPS54137931A JP S54137931 A JPS54137931 A JP S54137931A JP 4628478 A JP4628478 A JP 4628478A JP 4628478 A JP4628478 A JP 4628478A JP S54137931 A JPS54137931 A JP S54137931A
- Authority
- JP
- Japan
- Prior art keywords
- data
- block
- controller
- display
- picture
- 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
Abstract
PURPOSE: To shorten the time for data transfer by making it possible to set one-dot display data through the single operation of a microcomputer.
CONSTITUTION: To display a picture for one screen, controller 7 by a microcomputer transfers block switching data to block switching register 8 by using an output port. In this state, since memory-unit addresses of the above-mentined controller 7 corresponds to addresses of one block of picture memory unit 9 respectively, controller 7 transfers address information and data to an address bus and a data bus by a single data transfer instruction and set data for one dot to picture memory unit 9. This data transfer instruction is repeated 32768 times so as to display data for one block. Then, this operation repeated four times with block switching data changes, thereby displaying data for one screen.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4628478A JPS54137931A (en) | 1978-04-18 | 1978-04-18 | Picture display unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4628478A JPS54137931A (en) | 1978-04-18 | 1978-04-18 | Picture display unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54137931A true JPS54137931A (en) | 1979-10-26 |
Family
ID=12742915
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4628478A Pending JPS54137931A (en) | 1978-04-18 | 1978-04-18 | Picture display unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54137931A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62235687A (en) * | 1986-04-04 | 1987-10-15 | Nec Corp | Scroll displaying system for image data |
-
1978
- 1978-04-18 JP JP4628478A patent/JPS54137931A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62235687A (en) * | 1986-04-04 | 1987-10-15 | Nec Corp | Scroll displaying system for image data |
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