JPS6433644A - Control system for video memory - Google Patents
Control system for video memoryInfo
- Publication number
- JPS6433644A JPS6433644A JP62188945A JP18894587A JPS6433644A JP S6433644 A JPS6433644 A JP S6433644A JP 62188945 A JP62188945 A JP 62188945A JP 18894587 A JP18894587 A JP 18894587A JP S6433644 A JPS6433644 A JP S6433644A
- Authority
- JP
- Japan
- Prior art keywords
- memory
- page
- data
- signal
- sheet
- 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
- Record Information Processing For Printing (AREA)
- Storing Facsimile Image Data (AREA)
- Dot-Matrix Printers And Others (AREA)
Abstract
PURPOSE:To effectively increase the printing speed by securing such a constitution where all data stored in a memory is always cleared in both single sheet or multi-sheet printing modes when a reading action is through with a relevant page and it is not required to write an erasion signal (zero data) into the entire area of a single page when the picture data on the next page is written. CONSTITUTION:A write control signal Ws is outputted from a CPU in a reading cycle right before a writing action of the picture data on the next page in both single sheet and multi-sheet print modes of each page. An AND is secured between the signal Ws and a write pulse signal WR via a gate circuit 5 and the signals are delivered toward a video memory 1 based on a read timing mode. Then the zero data is written into the memory 1 corresponding to the address which is read out in parallel with the reading action of the picture data. The data stored in said address are successively erased. Therefore all data are cleared in the memory 1 when the reading action is through with the relevant page in both print modes. Thus the effective and high-speed memory control is attained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62188945A JPS6433644A (en) | 1987-07-30 | 1987-07-30 | Control system for video memory |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62188945A JPS6433644A (en) | 1987-07-30 | 1987-07-30 | Control system for video memory |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6433644A true JPS6433644A (en) | 1989-02-03 |
Family
ID=16232662
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62188945A Pending JPS6433644A (en) | 1987-07-30 | 1987-07-30 | Control system for video memory |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6433644A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012081733A (en) * | 2010-09-16 | 2012-04-26 | Ricoh Co Ltd | Printer and method of controlling the same |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60134334A (en) * | 1983-12-23 | 1985-07-17 | Hitachi Ltd | Printing controlling system |
JPS61264379A (en) * | 1985-05-20 | 1986-11-22 | 株式会社日立製作所 | Memory circuit |
-
1987
- 1987-07-30 JP JP62188945A patent/JPS6433644A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60134334A (en) * | 1983-12-23 | 1985-07-17 | Hitachi Ltd | Printing controlling system |
JPS61264379A (en) * | 1985-05-20 | 1986-11-22 | 株式会社日立製作所 | Memory circuit |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012081733A (en) * | 2010-09-16 | 2012-04-26 | Ricoh Co Ltd | Printer and method of controlling the same |
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