JPS57166658A - Auxiliary storage device - Google Patents

Auxiliary storage device

Info

Publication number
JPS57166658A
JPS57166658A JP56050632A JP5063281A JPS57166658A JP S57166658 A JPS57166658 A JP S57166658A JP 56050632 A JP56050632 A JP 56050632A JP 5063281 A JP5063281 A JP 5063281A JP S57166658 A JPS57166658 A JP S57166658A
Authority
JP
Japan
Prior art keywords
data
value
turned
register
storage device
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
JP56050632A
Other languages
Japanese (ja)
Inventor
Yoshiaki Yamashita
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 JP56050632A priority Critical patent/JPS57166658A/en
Publication of JPS57166658A publication Critical patent/JPS57166658A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/14—Handling requests for interconnection or transfer
    • G06F13/20—Handling requests for interconnection or transfer for access to input/output bus
    • G06F13/28—Handling requests for interconnection or transfer for access to input/output bus using burst mode transfer, e.g. direct memory access DMA, cycle steal

Abstract

PURPOSE:To reduce the occupation ratio, occupied time, etc. of a main storage device and improve the whole efficiency of an electronic computer system by providing a data buffer in an auxiliary storage device and shifting data only within the auxiliary storage to execute copying. CONSTITUTION:Initially read data is stored in a buffer memory 11 through an input bus 6. At the time, an address register 12 is set to ''0'', ''1'' is added to the address of the register 12 in every input of the succeeding data to the memory 11 and, when the final data is inputted, a control circuit 4 shunts the value of the final data to an address register 13. A comparator 14 compares the values between the registers 12 and 13 and, when both the values coincide with each other, an FF15 is turned to ''1''. In case of dissidence, ''1'' is added to the value of the register 12 and the succeeding data output is prepared. After completing the reproduction equivalent to 1 track, the value of a track counter 3<2> is turned to ''-1'' to prepre the next data output and the reproduction is completed when the value is turned to ''0''.
JP56050632A 1981-04-06 1981-04-06 Auxiliary storage device Pending JPS57166658A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56050632A JPS57166658A (en) 1981-04-06 1981-04-06 Auxiliary storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56050632A JPS57166658A (en) 1981-04-06 1981-04-06 Auxiliary storage device

Publications (1)

Publication Number Publication Date
JPS57166658A true JPS57166658A (en) 1982-10-14

Family

ID=12864338

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56050632A Pending JPS57166658A (en) 1981-04-06 1981-04-06 Auxiliary storage device

Country Status (1)

Country Link
JP (1) JPS57166658A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52155937A (en) * 1976-06-21 1977-12-24 Nec Corp Data transfer unit
JPS55105729A (en) * 1979-02-07 1980-08-13 Toshiba Corp Data processing unit
JPS5665257A (en) * 1979-11-01 1981-06-02 Casio Comput Co Ltd Data transfer system between external memory devices
JPS56114026A (en) * 1980-02-13 1981-09-08 Toshiba Corp Data processor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52155937A (en) * 1976-06-21 1977-12-24 Nec Corp Data transfer unit
JPS55105729A (en) * 1979-02-07 1980-08-13 Toshiba Corp Data processing unit
JPS5665257A (en) * 1979-11-01 1981-06-02 Casio Comput Co Ltd Data transfer system between external memory devices
JPS56114026A (en) * 1980-02-13 1981-09-08 Toshiba Corp Data processor

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