JPS5478933A - Magnetic disc control unit - Google Patents

Magnetic disc control unit

Info

Publication number
JPS5478933A
JPS5478933A JP14606277A JP14606277A JPS5478933A JP S5478933 A JPS5478933 A JP S5478933A JP 14606277 A JP14606277 A JP 14606277A JP 14606277 A JP14606277 A JP 14606277A JP S5478933 A JPS5478933 A JP S5478933A
Authority
JP
Japan
Prior art keywords
address
substitution
register
control unit
magnetic disc
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
JP14606277A
Other languages
Japanese (ja)
Inventor
Masataka Watanabe
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 JP14606277A priority Critical patent/JPS5478933A/en
Publication of JPS5478933A publication Critical patent/JPS5478933A/en
Pending legal-status Critical Current

Links

Landscapes

  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

PURPOSE: To enable to increase the processing ability of process program, by providing the address conversion circuit.
CONSTITUTION: The address conversion circuit AC9 is added. The address using substituting address is registrated to the index address register IR10 through the bus circuit 5 from CPU 6 in advance. Accordingly, the processing program is not required afterward to judge whether the substitution address is designated to the objective address or not. That is, in the substitution address comparison circuit 11, the address designated 14 with the processing program and the address of IR10 are compared, and if they are in agreement, the address selection section 12 is operated, and the objective address registered in the substitution address register 13 in advance is set to the address register AR4 through the selector section 12. If the agreement 11 is not obtained, the address of the address designation line 14 is set to AR4 via the selector section 12 as it is.
COPYRIGHT: (C)1979,JPO&Japio
JP14606277A 1977-12-07 1977-12-07 Magnetic disc control unit Pending JPS5478933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14606277A JPS5478933A (en) 1977-12-07 1977-12-07 Magnetic disc control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14606277A JPS5478933A (en) 1977-12-07 1977-12-07 Magnetic disc control unit

Publications (1)

Publication Number Publication Date
JPS5478933A true JPS5478933A (en) 1979-06-23

Family

ID=15399208

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14606277A Pending JPS5478933A (en) 1977-12-07 1977-12-07 Magnetic disc control unit

Country Status (1)

Country Link
JP (1) JPS5478933A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6074020A (en) * 1983-09-30 1985-04-26 Toshiba Corp Storage device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6074020A (en) * 1983-09-30 1985-04-26 Toshiba Corp Storage device
JPH0318208B2 (en) * 1983-09-30 1991-03-12 Tokyo Shibaura Electric Co

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