JPS5447538A - Channel device - Google Patents
Channel deviceInfo
- Publication number
- JPS5447538A JPS5447538A JP11336177A JP11336177A JPS5447538A JP S5447538 A JPS5447538 A JP S5447538A JP 11336177 A JP11336177 A JP 11336177A JP 11336177 A JP11336177 A JP 11336177A JP S5447538 A JPS5447538 A JP S5447538A
- Authority
- JP
- Japan
- Prior art keywords
- ccw
- channel
- input
- ccr2
- output 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.)
- Granted
Links
Abstract
PURPOSE: To constitute the channel device in such a way that the input/output action which could not hitherto executed unless plural numbers of te channel command word are prepared through the program may be executed with just one command ward, and thus to shorten the time required for reading of the input/output device.
CONSTITUTION: Channel command word CCW is read out, and ahe data trasnfer is controlled based on CCW between the main memory and the input/output device. In this device, CCW is composed of the command part, the data address part, the flag part and the counter part, and channel register CCR2 is provided to read in CCW. In addition, the following component parts are added to constitute a channel device: flag bit CCR which controls the data transfer based on CCW and renews the contents of the data address part and the counter part of register CCR2; zero detector 20 which detects whether the counter part of CCR2 is zero or not; logic circuits 11W14; logical product circuits 15W18; and logic circuit 19 respectively. As a reslut, the time can be reduced for reading of the input/output device
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11336177A JPS5953566B2 (en) | 1977-09-22 | 1977-09-22 | channel device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11336177A JPS5953566B2 (en) | 1977-09-22 | 1977-09-22 | channel device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5447538A true JPS5447538A (en) | 1979-04-14 |
JPS5953566B2 JPS5953566B2 (en) | 1984-12-26 |
Family
ID=14610323
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11336177A Expired JPS5953566B2 (en) | 1977-09-22 | 1977-09-22 | channel device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5953566B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6362025A (en) * | 1986-09-03 | 1988-03-18 | Sharp Corp | Fast file access method |
-
1977
- 1977-09-22 JP JP11336177A patent/JPS5953566B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6362025A (en) * | 1986-09-03 | 1988-03-18 | Sharp Corp | Fast file access method |
Also Published As
Publication number | Publication date |
---|---|
JPS5953566B2 (en) | 1984-12-26 |
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