JPS55143664A - Data transfer method of magnetic memory unit - Google Patents

Data transfer method of magnetic memory unit

Info

Publication number
JPS55143664A
JPS55143664A JP5035979A JP5035979A JPS55143664A JP S55143664 A JPS55143664 A JP S55143664A JP 5035979 A JP5035979 A JP 5035979A JP 5035979 A JP5035979 A JP 5035979A JP S55143664 A JPS55143664 A JP S55143664A
Authority
JP
Japan
Prior art keywords
transfer
time
register
stored
data
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
JP5035979A
Other languages
Japanese (ja)
Inventor
Fumiaki Miyamoto
Tetsuo Sato
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 JP5035979A priority Critical patent/JPS55143664A/en
Publication of JPS55143664A publication Critical patent/JPS55143664A/en
Pending legal-status Critical Current

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  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE: To shorten the maximum time and mean time of transfer by shortening the time of access, even if it takes a long time, by dividing the transfer into two without remodeling specially the main body of a magnetic memory unit.
CONSTITUTION: When transfer is requested, a transfer start address is stored in sector register 7 and track register 8 via input-output interface 12 and under transfer-request halving control 13, the 1st transfer start address is generated being divided into two and stored in selector register 7a and track register 8a. When a head is positioned between a transfer start data position where sector coincidence circuit 6 detects the 1st transfer start address agreeing with a track outputt by sector counter 5 and the transfer end data position, data on a distance between the head position and transfer data end position are transferred and after the completion of the 1st transfer, the 2nd address is stored in registers 7a and 8a for the start of the 2nd transfer, thereby shortening the maximum transfer time and mean transfer time in case that the access time is long.
COPYRIGHT: (C)1980,JPO&Japio
JP5035979A 1979-04-25 1979-04-25 Data transfer method of magnetic memory unit Pending JPS55143664A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5035979A JPS55143664A (en) 1979-04-25 1979-04-25 Data transfer method of magnetic memory unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5035979A JPS55143664A (en) 1979-04-25 1979-04-25 Data transfer method of magnetic memory unit

Publications (1)

Publication Number Publication Date
JPS55143664A true JPS55143664A (en) 1980-11-10

Family

ID=12856691

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5035979A Pending JPS55143664A (en) 1979-04-25 1979-04-25 Data transfer method of magnetic memory unit

Country Status (1)

Country Link
JP (1) JPS55143664A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5833767A (en) * 1981-08-21 1983-02-28 Canon Inc Disc controller
JPS6358363U (en) * 1986-10-01 1988-04-19
JPH027273A (en) * 1988-06-24 1990-01-11 Nec Corp Disk access control system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5833767A (en) * 1981-08-21 1983-02-28 Canon Inc Disc controller
JPS6358363U (en) * 1986-10-01 1988-04-19
JPH027273A (en) * 1988-06-24 1990-01-11 Nec Corp Disk access control system

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