JPS5517841A - Magnetic tape device with protecting functions - Google Patents
Magnetic tape device with protecting functionsInfo
- Publication number
- JPS5517841A JPS5517841A JP8944278A JP8944278A JPS5517841A JP S5517841 A JPS5517841 A JP S5517841A JP 8944278 A JP8944278 A JP 8944278A JP 8944278 A JP8944278 A JP 8944278A JP S5517841 A JPS5517841 A JP S5517841A
- Authority
- JP
- Japan
- Prior art keywords
- deck
- tape
- magnetic tape
- request
- tape device
- 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
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
PURPOSE: To protect a magnetic tape device accessed for plural CPUs by receiving I/O requests from CPUs according to the starting mark position of a tape.
CONSTITUTION: Register 7 for storing CPU1 or CPU2, which uses the deck of magnetic tape device 5, is equipped correspondingly to the deck. Only when the tape of deck is placed on the position of tape staring mark or register 7 corresponding to the deck indicates CPU which outputted an I/O request, the I/O request from each CPU is received. When the tape of deck is not placed on the position of tape starting mark and register 7 corresponding to the deck does not indicates CPU which outputted I/O request, the I/O request is not received.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8944278A JPS5517841A (en) | 1978-07-24 | 1978-07-24 | Magnetic tape device with protecting functions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8944278A JPS5517841A (en) | 1978-07-24 | 1978-07-24 | Magnetic tape device with protecting functions |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5517841A true JPS5517841A (en) | 1980-02-07 |
Family
ID=13970785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8944278A Pending JPS5517841A (en) | 1978-07-24 | 1978-07-24 | Magnetic tape device with protecting functions |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5517841A (en) |
-
1978
- 1978-07-24 JP JP8944278A patent/JPS5517841A/en active Pending
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