JPS5564695A - Memory diagnostic system - Google Patents
Memory diagnostic systemInfo
- Publication number
- JPS5564695A JPS5564695A JP13728978A JP13728978A JPS5564695A JP S5564695 A JPS5564695 A JP S5564695A JP 13728978 A JP13728978 A JP 13728978A JP 13728978 A JP13728978 A JP 13728978A JP S5564695 A JPS5564695 A JP S5564695A
- Authority
- JP
- Japan
- Prior art keywords
- memory
- address
- output
- packaged
- access
- 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
Landscapes
- Techniques For Improving Reliability Of Storages (AREA)
- Test And Diagnosis Of Digital Computers (AREA)
Abstract
PURPOSE: To make a decision on faulty qualities of a memory and memory driver circuit by forming address information as a memory output when access to an address space where no memory is packaged is attained in a diagnostic mode for the memory unit.
CONSTITUTION: When memory driver circuit 1 commands a diagnosis by diagnostic command signal 11, attaining access to an address where no memory is packaged make address detection signal 13 of address detection circuit 4 change into [1] to instruct address selector circuit 3 to output address information, thereby outputting data to output 14. Therefore, access to address areas (a) and (c) with packaged memory is attained normally and the contents of memory 2 appear at output 14. In case of access to address area (b) with no packaged memory, address information is led out. Consequently, when different address information is outputted from output 14, a decision on the fault of circuit 1 is made to discriminate a fault memory element.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13728978A JPS5564695A (en) | 1978-11-09 | 1978-11-09 | Memory diagnostic system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13728978A JPS5564695A (en) | 1978-11-09 | 1978-11-09 | Memory diagnostic system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5564695A true JPS5564695A (en) | 1980-05-15 |
JPS6131901B2 JPS6131901B2 (en) | 1986-07-23 |
Family
ID=15195194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13728978A Granted JPS5564695A (en) | 1978-11-09 | 1978-11-09 | Memory diagnostic system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5564695A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01251390A (en) * | 1988-03-30 | 1989-10-06 | Matsushita Electric Ind Co Ltd | Storage device |
-
1978
- 1978-11-09 JP JP13728978A patent/JPS5564695A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01251390A (en) * | 1988-03-30 | 1989-10-06 | Matsushita Electric Ind Co Ltd | Storage device |
Also Published As
Publication number | Publication date |
---|---|
JPS6131901B2 (en) | 1986-07-23 |
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