JPS5650444A - Undefined character processing system - Google Patents
Undefined character processing systemInfo
- Publication number
- JPS5650444A JPS5650444A JP12652979A JP12652979A JPS5650444A JP S5650444 A JPS5650444 A JP S5650444A JP 12652979 A JP12652979 A JP 12652979A JP 12652979 A JP12652979 A JP 12652979A JP S5650444 A JPS5650444 A JP S5650444A
- Authority
- JP
- Japan
- Prior art keywords
- undefined
- output
- circuit
- character
- signal
- 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 make it possible to detect and process undefined characters by a simple method, by comparing undefined character codes and programmed character codes with each other to detect undefined character codes from programmed character codes.
CONSTITUTION: Character data dependent upon the object program processed by the CPU is output from I/O interface 1 and is applied to undefined character code detecting circuit 2 and AND gate 3. If this data is not the undefined code, signal NDS is not output to latch circuit 6 and data is not read into circuit 6. Further, a memory in provided which stores plural undefined character codes preset to circuit 2, and undefined character codes stored in this memory and input character data are compared with each other; and if the undefined character code is detected, detection signal D is output, and signal NDS is output to circuit 6 when this signal D is output. Then, signal D and the output of circuit 6 are applied to logical operation circuit to output the undefined character to be processed to the output side of the logical operation circuit.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12652979A JPS5650444A (en) | 1979-10-01 | 1979-10-01 | Undefined character processing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12652979A JPS5650444A (en) | 1979-10-01 | 1979-10-01 | Undefined character processing system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5650444A true JPS5650444A (en) | 1981-05-07 |
Family
ID=14937450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12652979A Pending JPS5650444A (en) | 1979-10-01 | 1979-10-01 | Undefined character processing system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5650444A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5452926A (en) * | 1977-10-05 | 1979-04-25 | Hitachi Ltd | Character pattern generator |
-
1979
- 1979-10-01 JP JP12652979A patent/JPS5650444A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5452926A (en) * | 1977-10-05 | 1979-04-25 | Hitachi Ltd | Character pattern generator |
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