JPS5714944A - Input/output sysytem - Google Patents

Input/output sysytem

Info

Publication number
JPS5714944A
JPS5714944A JP9013680A JP9013680A JPS5714944A JP S5714944 A JPS5714944 A JP S5714944A JP 9013680 A JP9013680 A JP 9013680A JP 9013680 A JP9013680 A JP 9013680A JP S5714944 A JPS5714944 A JP S5714944A
Authority
JP
Japan
Prior art keywords
data
output
circuit
code
register
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.)
Granted
Application number
JP9013680A
Other languages
Japanese (ja)
Other versions
JPS607292B2 (en
Inventor
Yosuke Tsuyuki
Akira Yamazaki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55090136A priority Critical patent/JPS607292B2/en
Publication of JPS5714944A publication Critical patent/JPS5714944A/en
Publication of JPS607292B2 publication Critical patent/JPS607292B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F5/00—Methods or arrangements for data conversion without changing the order or content of the data handled

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer And Data Communications (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

PURPOSE:To enable a central processor to process an input/output data in the form of a fixed length data in a system using a variable length code, by putting an invalid code into an idle region. CONSTITUTION:A data process system comprises with a mutual connection among an input device 1, a central processor 2 and an output device 3 via data buses 4 and 5. The variable length character code is transferred by a byte in the device 1 to a buffer register 7 from a data buffer 6 via a counter circuit 9. In this case, the circuit 9 counts the number of bytes of the character code to be transferred to the register 7 and then report the end of transfer to a data control circuit 10. Receiving this report, the circuit 10 puts an invalid code into the rest part of the register 7 and then transmits it to the processor 2 in the form of a fixed length daga. The device 2 eliminates the invalid code for delivery of an output through an output deciding circuit 12.
JP55090136A 1980-07-02 1980-07-02 Input/output method Expired JPS607292B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55090136A JPS607292B2 (en) 1980-07-02 1980-07-02 Input/output method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55090136A JPS607292B2 (en) 1980-07-02 1980-07-02 Input/output method

Publications (2)

Publication Number Publication Date
JPS5714944A true JPS5714944A (en) 1982-01-26
JPS607292B2 JPS607292B2 (en) 1985-02-23

Family

ID=13990085

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55090136A Expired JPS607292B2 (en) 1980-07-02 1980-07-02 Input/output method

Country Status (1)

Country Link
JP (1) JPS607292B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04343646A (en) * 1991-05-20 1992-11-30 Kilony Sangyo Kk Contact for copying detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04343646A (en) * 1991-05-20 1992-11-30 Kilony Sangyo Kk Contact for copying detector

Also Published As

Publication number Publication date
JPS607292B2 (en) 1985-02-23

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