JPS57111644A - Magnetic disc adapter - Google Patents

Magnetic disc adapter

Info

Publication number
JPS57111644A
JPS57111644A JP18532580A JP18532580A JPS57111644A JP S57111644 A JPS57111644 A JP S57111644A JP 18532580 A JP18532580 A JP 18532580A JP 18532580 A JP18532580 A JP 18532580A JP S57111644 A JPS57111644 A JP S57111644A
Authority
JP
Japan
Prior art keywords
magnetic disc
read
write
control
disc 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
JP18532580A
Other languages
Japanese (ja)
Inventor
Yasumori Hibi
Takashi Koike
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP18532580A priority Critical patent/JPS57111644A/en
Publication of JPS57111644A publication Critical patent/JPS57111644A/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
    • G06F13/16—Handling requests for interconnection or transfer for access to memory bus
    • G06F13/18—Handling requests for interconnection or transfer for access to memory bus based on priority control

Abstract

PURPOSE:To perform read/write control with one route perform seek control with the other route by providing respectively two systems of mutually independent routes for a upper priority control device and a lower psiority magnetic disc device. CONSTITUTION:While read/write control is executed for a magnetic disc device from an upper priority control device #ADKC of a system A, a #A connecting part 6A, a tag conversion circuit 7A, a read/write control system 4 and a #A drive interface 8A are merely occupied, and during this time, it is possible to perform seek control from the upper priority control device #BDKC of, for example, a system B to the magnetic disc device. However, when the #BDKC of the system B emits a read/write command for a magnetic disc device 1-1, the system 4 is occupied and therefore, the # connecting part 6B returns said read/write busy signal and is kept standing by.
JP18532580A 1980-12-29 1980-12-29 Magnetic disc adapter Pending JPS57111644A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18532580A JPS57111644A (en) 1980-12-29 1980-12-29 Magnetic disc adapter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18532580A JPS57111644A (en) 1980-12-29 1980-12-29 Magnetic disc adapter

Publications (1)

Publication Number Publication Date
JPS57111644A true JPS57111644A (en) 1982-07-12

Family

ID=16168847

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18532580A Pending JPS57111644A (en) 1980-12-29 1980-12-29 Magnetic disc adapter

Country Status (1)

Country Link
JP (1) JPS57111644A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58211938A (en) * 1982-06-03 1983-12-09 Nissan Motor Co Ltd Side guard mold installation structure for car
JPS60179863A (en) * 1984-02-27 1985-09-13 Fujitsu Ltd Retry control method of input/output system
JPS6284330A (en) * 1985-10-09 1987-04-17 Mitsubishi Electric Corp Disk controller

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58211938A (en) * 1982-06-03 1983-12-09 Nissan Motor Co Ltd Side guard mold installation structure for car
JPH0154216B2 (en) * 1982-06-03 1989-11-17 Nissan Motor
JPS60179863A (en) * 1984-02-27 1985-09-13 Fujitsu Ltd Retry control method of input/output system
JPH0115088B2 (en) * 1984-02-27 1989-03-15 Fujitsu Ltd
JPS6284330A (en) * 1985-10-09 1987-04-17 Mitsubishi Electric Corp Disk controller

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