JPS55113199A - Diagnostic system for memory unit - Google Patents

Diagnostic system for memory unit

Info

Publication number
JPS55113199A
JPS55113199A JP2032379A JP2032379A JPS55113199A JP S55113199 A JPS55113199 A JP S55113199A JP 2032379 A JP2032379 A JP 2032379A JP 2032379 A JP2032379 A JP 2032379A JP S55113199 A JPS55113199 A JP S55113199A
Authority
JP
Japan
Prior art keywords
area
diagnosis
diagnosed
stored information
breaking
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
JP2032379A
Other languages
Japanese (ja)
Other versions
JPS5916360B2 (en
Inventor
Mitsuru Kimi
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 JP54020323A priority Critical patent/JPS5916360B2/en
Publication of JPS55113199A publication Critical patent/JPS55113199A/en
Publication of JPS5916360B2 publication Critical patent/JPS5916360B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To make it possible to make a diagnosis without breaking stored information by letting stored information in an area to be diagnosed stand by until the diagnosis ends.
CONSTITUTION: Once a diagnostic program is started, processor CPU reads and transfers the memory contents of 1st diagnosed area A1 of memory MEM to register REG and allows them to stand by in standby area SV of MEM. Next, CPU makes a diagnosis of area A1 by using a test pattern and when it is not abnormal, information standing by is read out from area SV and then rewritten in area A1. Those operations are repeated until the diagnosis of every diagnosed area ends. Thus, the diagnosis can be made without breaking stored information.
COPYRIGHT: (C)1980,JPO&Japio
JP54020323A 1979-02-23 1979-02-23 Storage device diagnostic method Expired JPS5916360B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54020323A JPS5916360B2 (en) 1979-02-23 1979-02-23 Storage device diagnostic method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54020323A JPS5916360B2 (en) 1979-02-23 1979-02-23 Storage device diagnostic method

Publications (2)

Publication Number Publication Date
JPS55113199A true JPS55113199A (en) 1980-09-01
JPS5916360B2 JPS5916360B2 (en) 1984-04-14

Family

ID=12023915

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54020323A Expired JPS5916360B2 (en) 1979-02-23 1979-02-23 Storage device diagnostic method

Country Status (1)

Country Link
JP (1) JPS5916360B2 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57156571A (en) * 1981-03-23 1982-09-27 Nec Corp Testing circuit for random access memory
JPS5856294A (en) * 1981-09-30 1983-04-02 Hitachi Ltd Read/write checking method of random access memory
JPS5974764A (en) * 1982-10-20 1984-04-27 Sanyo Electric Co Ltd Automatic dialing device
JPS60181947A (en) * 1984-02-29 1985-09-17 Fujitsu Ltd Memory diagnosing system
JPS61199140A (en) * 1985-03-01 1986-09-03 Fujitsu Ltd Memory check system of data input device
JPS6219951A (en) * 1985-07-17 1987-01-28 Fujitsu Ltd Semiconductor disk device
JPS647240A (en) * 1987-06-30 1989-01-11 Hioki Electric Works Memory capacity discriminating method for memory card
JPH04237353A (en) * 1991-01-22 1992-08-25 Nec Shizuoka Ltd Memory contents protecting system considering instantaneous disconnection of power supply in memory diagnosis

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS627839U (en) * 1985-07-01 1987-01-17

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57156571A (en) * 1981-03-23 1982-09-27 Nec Corp Testing circuit for random access memory
JPH0321936B2 (en) * 1981-03-23 1991-03-25 Nippon Electric Co
JPS5856294A (en) * 1981-09-30 1983-04-02 Hitachi Ltd Read/write checking method of random access memory
JPS5974764A (en) * 1982-10-20 1984-04-27 Sanyo Electric Co Ltd Automatic dialing device
JPS60181947A (en) * 1984-02-29 1985-09-17 Fujitsu Ltd Memory diagnosing system
JPS61199140A (en) * 1985-03-01 1986-09-03 Fujitsu Ltd Memory check system of data input device
JPS6219951A (en) * 1985-07-17 1987-01-28 Fujitsu Ltd Semiconductor disk device
JPS647240A (en) * 1987-06-30 1989-01-11 Hioki Electric Works Memory capacity discriminating method for memory card
JPH04237353A (en) * 1991-01-22 1992-08-25 Nec Shizuoka Ltd Memory contents protecting system considering instantaneous disconnection of power supply in memory diagnosis

Also Published As

Publication number Publication date
JPS5916360B2 (en) 1984-04-14

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