JPS5771028A - Time information setting system - Google Patents
Time information setting systemInfo
- Publication number
- JPS5771028A JPS5771028A JP14704780A JP14704780A JPS5771028A JP S5771028 A JPS5771028 A JP S5771028A JP 14704780 A JP14704780 A JP 14704780A JP 14704780 A JP14704780 A JP 14704780A JP S5771028 A JPS5771028 A JP S5771028A
- Authority
- JP
- Japan
- Prior art keywords
- time
- time information
- register
- computer
- clock signal
- 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
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/48—Program initiating; Program switching, e.g. by interrupt
- G06F9/4806—Task transfer initiation or dispatching
- G06F9/4812—Task transfer initiation or dispatching by interrupt, e.g. masked
- G06F9/4825—Interrupt from clock, e.g. time of day
Landscapes
- Engineering & Computer Science (AREA)
- Software Systems (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
- Electric Clocks (AREA)
Abstract
PURPOSE:To fetch accurate time information into a computer, by updating the time of a time register prior to a change in actual time by a system which reads the time information in the computer. CONSTITUTION:In a time information setting circuit, the level of an input acutal- time clock signal CLK-R is inverted by an inverter 18 to obtain a fundamental clock signal CLK-S, which is outputted to the second register 12 of a time register 11. Therefore, time information indicated by the time register 11 leads the acutal time by nearly the half period of the clock signal CLK-R, so a computer fetches stable time information, held in a time information register 22, at the timing of an interruption signal INT. This time information is coincident with the actual time by the timing of the interruption signal INT, so that the accurate time information if fetched in the computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14704780A JPS5771028A (en) | 1980-10-21 | 1980-10-21 | Time information setting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14704780A JPS5771028A (en) | 1980-10-21 | 1980-10-21 | Time information setting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5771028A true JPS5771028A (en) | 1982-05-01 |
Family
ID=15421297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14704780A Pending JPS5771028A (en) | 1980-10-21 | 1980-10-21 | Time information setting system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5771028A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63309889A (en) * | 1987-06-11 | 1988-12-16 | Sanyo Electric Co Ltd | Time data receiving and setting circuit |
-
1980
- 1980-10-21 JP JP14704780A patent/JPS5771028A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63309889A (en) * | 1987-06-11 | 1988-12-16 | Sanyo Electric Co Ltd | Time data receiving and setting circuit |
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