JPS5650444A - Undefined character processing system - Google Patents

Undefined character processing system

Info

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
Application number
JP12652979A
Other languages
Japanese (ja)
Inventor
Katsumi Konnai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Casio Computer Co Ltd
Original Assignee
Casio Computer Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Casio Computer Co Ltd filed Critical Casio Computer Co Ltd
Priority to JP12652979A priority Critical patent/JPS5650444A/en
Publication of JPS5650444A publication Critical patent/JPS5650444A/en
Pending legal-status Critical Current

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
JP12652979A 1979-10-01 1979-10-01 Undefined character processing system Pending JPS5650444A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5452926A (en) * 1977-10-05 1979-04-25 Hitachi Ltd Character pattern generator

Patent Citations (1)

* Cited by examiner, † Cited by third party
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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