JPS5447424A - Picture memory unit - Google Patents
Picture memory unitInfo
- Publication number
- JPS5447424A JPS5447424A JP11385977A JP11385977A JPS5447424A JP S5447424 A JPS5447424 A JP S5447424A JP 11385977 A JP11385977 A JP 11385977A JP 11385977 A JP11385977 A JP 11385977A JP S5447424 A JPS5447424 A JP S5447424A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- period
- circuit
- picture element
- address
- 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 ensure the picture renewal in a short time as well as an independent action at the CPU side to be applied widely to the TV game and the like, by performing the writing of the picture element signals via an effective use of the remainnig periods excluding the priority period.
CONSTITUTION: The write request signal sent from CPU12 is detected through circuit 19, and the remaining periods excluding the signal reading period which is determined in preference in picture memory 16 through circuit 19. And during this period, write signal W is delivered to the write request. After this, multiplexer 15 reads out the address information of ratch circuit 20 via signal W to designate the address of memory 16, and the picture element signals of ratch circuit 21 are written in parallel into the address designated. Thus, the picture element signal transmitted from CPU12 can be written in an extremely effective way in the periods excluding the reading period in the reading cycle of the picture element signal in one address without waiting for the vertical blanking period
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11385977A JPS5447424A (en) | 1977-09-21 | 1977-09-21 | Picture memory unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11385977A JPS5447424A (en) | 1977-09-21 | 1977-09-21 | Picture memory unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5447424A true JPS5447424A (en) | 1979-04-14 |
Family
ID=14622860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11385977A Pending JPS5447424A (en) | 1977-09-21 | 1977-09-21 | Picture memory unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5447424A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57154286A (en) * | 1981-03-17 | 1982-09-24 | Omron Tateisi Electronics Co | Display data renewal controller for scanning display |
JPS5811992A (en) * | 1981-07-15 | 1983-01-22 | 松下電工株式会社 | Image display unit |
JPS5895394A (en) * | 1981-11-30 | 1983-06-06 | 株式会社東芝 | Matrix type liquid crystal display |
JPS60107693A (en) * | 1983-11-17 | 1985-06-13 | 株式会社山武 | Control of display memory |
JPS6252591A (en) * | 1985-08-31 | 1987-03-07 | 日本電気ホームエレクトロニクス株式会社 | Access control system for screen memory |
JPS6287390U (en) * | 1986-10-15 | 1987-06-04 | ||
JPH03129391A (en) * | 1990-06-15 | 1991-06-03 | Hitachi Ltd | Access method for refresh memory, display controller and graphic processor |
JPH0535232A (en) * | 1991-11-25 | 1993-02-12 | Sony Corp | Memory control circuit |
JPH07225573A (en) * | 1995-01-26 | 1995-08-22 | Hitachi Ltd | Method of accessing refresh memory, display controller and graphic processor |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5157137A (en) * | 1974-11-13 | 1976-05-19 | Matsushita Electric Ind Co Ltd | INKYOKUSENKANDEISUPUREISOCHI |
JPS5282134A (en) * | 1975-12-29 | 1977-07-09 | Hitachi Ltd | Data display control system |
-
1977
- 1977-09-21 JP JP11385977A patent/JPS5447424A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5157137A (en) * | 1974-11-13 | 1976-05-19 | Matsushita Electric Ind Co Ltd | INKYOKUSENKANDEISUPUREISOCHI |
JPS5282134A (en) * | 1975-12-29 | 1977-07-09 | Hitachi Ltd | Data display control system |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57154286A (en) * | 1981-03-17 | 1982-09-24 | Omron Tateisi Electronics Co | Display data renewal controller for scanning display |
JPS5811992A (en) * | 1981-07-15 | 1983-01-22 | 松下電工株式会社 | Image display unit |
JPS5895394A (en) * | 1981-11-30 | 1983-06-06 | 株式会社東芝 | Matrix type liquid crystal display |
JPS60107693A (en) * | 1983-11-17 | 1985-06-13 | 株式会社山武 | Control of display memory |
JPS6252591A (en) * | 1985-08-31 | 1987-03-07 | 日本電気ホームエレクトロニクス株式会社 | Access control system for screen memory |
JPS6287390U (en) * | 1986-10-15 | 1987-06-04 | ||
JPH03129391A (en) * | 1990-06-15 | 1991-06-03 | Hitachi Ltd | Access method for refresh memory, display controller and graphic processor |
JPH0535232A (en) * | 1991-11-25 | 1993-02-12 | Sony Corp | Memory control circuit |
JPH07225573A (en) * | 1995-01-26 | 1995-08-22 | Hitachi Ltd | Method of accessing refresh memory, display controller and graphic processor |
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