JPS55113199A - Diagnostic system for memory unit - Google Patents
Diagnostic system for memory unitInfo
- 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
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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS627839U (en) * | 1985-07-01 | 1987-01-17 |
-
1979
- 1979-02-23 JP JP54020323A patent/JPS5916360B2/en not_active Expired
Cited By (9)
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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