JPS5572260A - Input-output device - Google Patents
Input-output deviceInfo
- Publication number
- JPS5572260A JPS5572260A JP14576178A JP14576178A JPS5572260A JP S5572260 A JPS5572260 A JP S5572260A JP 14576178 A JP14576178 A JP 14576178A JP 14576178 A JP14576178 A JP 14576178A JP S5572260 A JPS5572260 A JP S5572260A
- Authority
- JP
- Japan
- Prior art keywords
- input
- cpu
- hot
- line replacement
- 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
Landscapes
- Hardware Redundancy (AREA)
Abstract
PURPOSE: To prevent an error signal from being generated due to hot-line replacement in case that an input-output board connected to an input-output controller is in process of hot-line replacement, by providing the input-output controller with a switch method.
CONSTITUTION: When CPU sends a signal for the selective assignment of input-output board 3i to input-output controller IOC2i, error detection circuit 101 detects the absence of 3i, if so, and sends only error signal ERR to CPU. When 3i is in process of hot-line replacement, switch 102 outputs signal "1" and gate circuit 103 sends out AND output OEX of this signal "1" and error signal ERR to CPU, so that CPU can detect 3i being in process of hot-line replacement by receiving both ERR and OEX signals. Consequently, CPU assigns selectively 3i again after-ward.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14576178A JPS5572260A (en) | 1978-11-25 | 1978-11-25 | Input-output device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14576178A JPS5572260A (en) | 1978-11-25 | 1978-11-25 | Input-output device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5572260A true JPS5572260A (en) | 1980-05-30 |
Family
ID=15392541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14576178A Pending JPS5572260A (en) | 1978-11-25 | 1978-11-25 | Input-output device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5572260A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8352661B1 (en) * | 2010-03-24 | 2013-01-08 | Emc Corporation | Data storage systems having seamless software upgrades |
-
1978
- 1978-11-25 JP JP14576178A patent/JPS5572260A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8352661B1 (en) * | 2010-03-24 | 2013-01-08 | Emc Corporation | Data storage systems having seamless software upgrades |
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