JPS5498141A - Input/output device starting system - Google Patents
Input/output device starting systemInfo
- Publication number
- JPS5498141A JPS5498141A JP438978A JP438978A JPS5498141A JP S5498141 A JPS5498141 A JP S5498141A JP 438978 A JP438978 A JP 438978A JP 438978 A JP438978 A JP 438978A JP S5498141 A JPS5498141 A JP S5498141A
- Authority
- JP
- Japan
- Prior art keywords
- channel
- control device
- status
- inquiry
- inhibiting
- 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.)
- Granted
Links
Abstract
PURPOSE: To smooth the start of I/O devices by reporting the channel status before the channel control device reads the channel program and inhibiting the asynchronous interrupt request of I/O devices when the channel can accept the start operation.
CONSTITUTION: The control part which accepted signal 21 generated in response to the inquiry of a channel control device places the channel status onto data bus 25 to the channel control device by controlling selector 24. This status is held in channel status latch 23. Flip-flop 27 is set when AND of the inquiry of the channel control device and the idle state in channel status latch 23 is fulfilled in gate 26, and the output signal is sent to the I/O interface control part in the channel, thus inhibiting the asynchronous interrupt processing request.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53004389A JPS5844253B2 (en) | 1978-01-20 | 1978-01-20 | I/O device startup method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP53004389A JPS5844253B2 (en) | 1978-01-20 | 1978-01-20 | I/O device startup method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5498141A true JPS5498141A (en) | 1979-08-02 |
JPS5844253B2 JPS5844253B2 (en) | 1983-10-01 |
Family
ID=11582991
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53004389A Expired JPS5844253B2 (en) | 1978-01-20 | 1978-01-20 | I/O device startup method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5844253B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5076943A (en) * | 1973-11-02 | 1975-06-24 |
-
1978
- 1978-01-20 JP JP53004389A patent/JPS5844253B2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5076943A (en) * | 1973-11-02 | 1975-06-24 |
Also Published As
Publication number | Publication date |
---|---|
JPS5844253B2 (en) | 1983-10-01 |
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