JPS5538610A - Magnetic disc unit - Google Patents
Magnetic disc unitInfo
- Publication number
- JPS5538610A JPS5538610A JP10879078A JP10879078A JPS5538610A JP S5538610 A JPS5538610 A JP S5538610A JP 10879078 A JP10879078 A JP 10879078A JP 10879078 A JP10879078 A JP 10879078A JP S5538610 A JPS5538610 A JP S5538610A
- Authority
- JP
- Japan
- Prior art keywords
- register
- signal
- cylinder
- difference
- address
- 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
Landscapes
- Moving Of Head For Track Selection And Changing (AREA)
Abstract
PURPOSE: To shorten overhead time for positioning error corrections by a higher rank unit, by making automatic positioning error corrections by a magnetic disc unit.
CONSTITUTION: When a cylinder address is supplied from a higher rank unit through interface part 1, subtraction circuit 4 compares it with the contents of current cylinder address register 5 and their difference is stored in difference register 6. A positioning mechanism is driven to generate track pulses as the result, thereby causing register 6 to count down one by one. When the contents of register 6 reach zero, seek complete signal 11 is generated. On receiving lst sector signal 13 after the reception of signal 11, read demodulation circuit 9' starts reading demodulation operation. Register 5, stores only with the cylinder part of the format of an address part, makes a decision on whether output 12 of circuit 4 is zero after the storage. If signal 12 is not zero, a difference between the cylinder address and current cylinder is automatically stored in register 6 again, thereby performing positioning operation.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10879078A JPS5538610A (en) | 1978-09-04 | 1978-09-04 | Magnetic disc unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10879078A JPS5538610A (en) | 1978-09-04 | 1978-09-04 | Magnetic disc unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5538610A true JPS5538610A (en) | 1980-03-18 |
Family
ID=14493539
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10879078A Pending JPS5538610A (en) | 1978-09-04 | 1978-09-04 | Magnetic disc unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5538610A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6093685A (en) * | 1983-10-27 | 1985-05-25 | Pioneer Electronic Corp | Information selecting device of disc player |
JPS60182568A (en) * | 1984-02-29 | 1985-09-18 | Sony Corp | Position controller of information recording and/or reading means |
JPS62139178A (en) * | 1985-12-12 | 1987-06-22 | Nec Corp | Floppy disk device |
JPH06215500A (en) * | 1981-10-28 | 1994-08-05 | Discovision Assoc | Playback apparatus of recorded information |
-
1978
- 1978-09-04 JP JP10879078A patent/JPS5538610A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06215500A (en) * | 1981-10-28 | 1994-08-05 | Discovision Assoc | Playback apparatus of recorded information |
JPS6093685A (en) * | 1983-10-27 | 1985-05-25 | Pioneer Electronic Corp | Information selecting device of disc player |
JPS60182568A (en) * | 1984-02-29 | 1985-09-18 | Sony Corp | Position controller of information recording and/or reading means |
JPS62139178A (en) * | 1985-12-12 | 1987-06-22 | Nec Corp | Floppy disk device |
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