JPS54114047A - Character pattern generator - Google Patents
Character pattern generatorInfo
- Publication number
- JPS54114047A JPS54114047A JP2058178A JP2058178A JPS54114047A JP S54114047 A JPS54114047 A JP S54114047A JP 2058178 A JP2058178 A JP 2058178A JP 2058178 A JP2058178 A JP 2058178A JP S54114047 A JPS54114047 A JP S54114047A
- Authority
- JP
- Japan
- Prior art keywords
- character pattern
- logic function
- logic
- expressed
- character
- 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 compression for the character pattern data by means of the simplified technique of logic system by memorizing the character pattern expressed in the matrix in the form of the logic function.
CONSTITUTION: The fundamental conditions of the character pattern generator is as follows: the desired line (row) subpatterns D0WD4 are to be generated when character codes C0WC6 are applied along with line (row) numbers N0WN2. Now, output information Di (i=0W4) is expressed as Di = fi(C0, C1...C6, N0WN2) with logic function fi expressed in the main addition standard form, and the number of the logic product term of each Di is decreased via the simplified technique of the logic function to secure memorization of the logic function of a small redundancy. This simplified logic function is then written into character pattern memory part 4 composed of PLA. With application of character pattern type-based CB, character code C and subpattern number N from the external unit, unit 4 delivers the subpattern based on the logic function.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2058178A JPS54114047A (en) | 1978-02-24 | 1978-02-24 | Character pattern generator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2058178A JPS54114047A (en) | 1978-02-24 | 1978-02-24 | Character pattern generator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54114047A true JPS54114047A (en) | 1979-09-05 |
Family
ID=12031172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2058178A Pending JPS54114047A (en) | 1978-02-24 | 1978-02-24 | Character pattern generator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54114047A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5670593A (en) * | 1979-11-14 | 1981-06-12 | Tokyo Shibaura Electric Co | Display unit |
-
1978
- 1978-02-24 JP JP2058178A patent/JPS54114047A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5670593A (en) * | 1979-11-14 | 1981-06-12 | Tokyo Shibaura Electric Co | Display unit |
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