JPS57207942A - Unpacking circuit - Google Patents

Unpacking circuit

Info

Publication number
JPS57207942A
JPS57207942A JP56094397A JP9439781A JPS57207942A JP S57207942 A JPS57207942 A JP S57207942A JP 56094397 A JP56094397 A JP 56094397A JP 9439781 A JP9439781 A JP 9439781A JP S57207942 A JPS57207942 A JP S57207942A
Authority
JP
Japan
Prior art keywords
memory
unpacking
circuit
image
main memory
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
JP56094397A
Other languages
Japanese (ja)
Other versions
JPS6145260B2 (en
Inventor
Isao Fukushima
Moritomo Matsuyama
Takashi Nagashima
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP56094397A priority Critical patent/JPS57207942A/en
Publication of JPS57207942A publication Critical patent/JPS57207942A/en
Publication of JPS6145260B2 publication Critical patent/JPS6145260B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)

Abstract

PURPOSE:To improve the efficiency of a titled circuit by reducing the accessing frequency against the memory and by quickly performing unpackings and transferrings, by eliminating the necessity of unpacking to be performed by software when packed information is transferred by unpacking. CONSTITUTION:An unpacking circuit UC and a data register DR are installed in an intermemory transfer module 3 placed between an image memory 4 coupled with a display device 5 and a main memory 2 coupled with an external memory 6. The transfer module 3 reads out source data stored in Address A of the main memory 2 in accordance with preset command information, sets the data in the register DR, and write them in the image memory 4 through the unpacking circuit UC. Threrfore, transfer of image information stored in the external memory 6 in the form of 16 bits can be completed when the reading out R from the main memory 2 is performed one time and writing W in the image memory 4 is performed four times.
JP56094397A 1981-06-18 1981-06-18 Unpacking circuit Granted JPS57207942A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56094397A JPS57207942A (en) 1981-06-18 1981-06-18 Unpacking circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56094397A JPS57207942A (en) 1981-06-18 1981-06-18 Unpacking circuit

Publications (2)

Publication Number Publication Date
JPS57207942A true JPS57207942A (en) 1982-12-20
JPS6145260B2 JPS6145260B2 (en) 1986-10-07

Family

ID=14109126

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56094397A Granted JPS57207942A (en) 1981-06-18 1981-06-18 Unpacking circuit

Country Status (1)

Country Link
JP (1) JPS57207942A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008502975A (en) * 2004-06-16 2008-01-31 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Data processing device
US8587458B2 (en) 2011-12-07 2013-11-19 International Business Machines Corporation Unpacking a variable number of data bits

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008502975A (en) * 2004-06-16 2008-01-31 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Data processing device
US9239702B2 (en) 2004-06-16 2016-01-19 Intel Corporation Data processing apparatus
US8587458B2 (en) 2011-12-07 2013-11-19 International Business Machines Corporation Unpacking a variable number of data bits

Also Published As

Publication number Publication date
JPS6145260B2 (en) 1986-10-07

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