GB2056726B - Memory system - Google Patents
Memory systemInfo
- Publication number
- GB2056726B GB2056726B GB8031342A GB8031342A GB2056726B GB 2056726 B GB2056726 B GB 2056726B GB 8031342 A GB8031342 A GB 8031342A GB 8031342 A GB8031342 A GB 8031342A GB 2056726 B GB2056726 B GB 2056726B
- Authority
- GB
- United Kingdom
- Prior art keywords
- count
- addressed
- address signals
- stage
- successive
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1415—Saving, restoring, recovering or retrying at system level
- G06F11/1441—Resetting or repowering
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K21/00—Details of pulse counters or frequency dividers
- H03K21/18—Circuits for visual indication of the result
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K21/00—Details of pulse counters or frequency dividers
- H03K21/38—Starting, stopping or resetting the counter
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K21/00—Details of pulse counters or frequency dividers
- H03K21/40—Monitoring; Error detection; Preventing or correcting improper counter operation
- H03K21/403—Arrangements for storing the counting state in case of power supply interruption
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Distances Traversed On The Ground (AREA)
- Electric Clocks (AREA)
Abstract
Volatile electronic counter provides data output signals, e.g. four BCD stage counts, and four cyclically changing address signals normally used to drive a display. A area power down detector operates to initiate transfer of the count to successive locations in a non-volatile memory addressed using the address signals from the counter. When power is restored successive memory locators are addressed and compared with the corresponding count stage which is incremented until equal when the next memory location is accessed in order to restore the count.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/889,627 US4224506A (en) | 1978-03-24 | 1978-03-24 | Electronic counter with non-volatile memory |
| GB7909861A GB2019065B (en) | 1978-03-24 | 1979-03-21 | Electronic counter with non-volatile memory |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2056726A GB2056726A (en) | 1981-03-18 |
| GB2056726B true GB2056726B (en) | 1983-02-23 |
Family
ID=26270960
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8032498A Expired GB2056139B (en) | 1978-03-24 | 1979-03-21 | Memory system |
| GB8031342A Expired GB2056726B (en) | 1978-03-24 | 1980-09-29 | Memory system |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8032498A Expired GB2056139B (en) | 1978-03-24 | 1979-03-21 | Memory system |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB2056139B (en) |
-
1979
- 1979-03-21 GB GB8032498A patent/GB2056139B/en not_active Expired
-
1980
- 1980-09-29 GB GB8031342A patent/GB2056726B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB2056139A (en) | 1981-03-11 |
| GB2056726A (en) | 1981-03-18 |
| GB2056139B (en) | 1983-03-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PE20 | Patent expired after termination of 20 years |
Effective date: 19990320 |