JPS54131838A - Channel device - Google Patents
Channel deviceInfo
- Publication number
- JPS54131838A JPS54131838A JP3924378A JP3924378A JPS54131838A JP S54131838 A JPS54131838 A JP S54131838A JP 3924378 A JP3924378 A JP 3924378A JP 3924378 A JP3924378 A JP 3924378A JP S54131838 A JPS54131838 A JP S54131838A
- Authority
- JP
- Japan
- Prior art keywords
- bits
- address
- subchannel
- conversion
- register
- 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
Abstract
PURPOSE: To ensure the operation of I/O as the using unit via an optional combination within the range of the subchannel by providing the address conversion table to secure conversion of the device address of I/O into the corresponding subchannel address.
CONSTITUTION: Device address DA7 of the channel control word is composed of 8 bits. And the upper 4 bits give positioning to address conversion table 8, and the lower 4 bits are loaded to the lower 4 bits of memory address register 9. At the same time, the pattern of upper 4 bits of DA corresponded to the upper 4 bits of address SA of subchannel 2 is set previously to table 8 via operation panel 10. Thus, the conversion is carried out between DA and SA, and the upper 4 bits of SA obtained through conversion are loaded to the upper 4 bits of register 9. As a result, SA can be obtained to give an access to subchannel 2 for register 9.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3924378A JPS54131838A (en) | 1978-04-05 | 1978-04-05 | Channel device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3924378A JPS54131838A (en) | 1978-04-05 | 1978-04-05 | Channel device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54131838A true JPS54131838A (en) | 1979-10-13 |
Family
ID=12547679
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3924378A Pending JPS54131838A (en) | 1978-04-05 | 1978-04-05 | Channel device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54131838A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60108951A (en) * | 1983-11-17 | 1985-06-14 | Fujitsu Ltd | Data chaining system |
JPS60142455A (en) * | 1983-12-29 | 1985-07-27 | Fujitsu Ltd | Index processing system of routine table |
JPS60150152A (en) * | 1984-01-17 | 1985-08-07 | Fujitsu Ltd | Channel control system |
-
1978
- 1978-04-05 JP JP3924378A patent/JPS54131838A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60108951A (en) * | 1983-11-17 | 1985-06-14 | Fujitsu Ltd | Data chaining system |
JPH0122939B2 (en) * | 1983-11-17 | 1989-04-28 | Fujitsu Ltd | |
JPS60142455A (en) * | 1983-12-29 | 1985-07-27 | Fujitsu Ltd | Index processing system of routine table |
JPS60150152A (en) * | 1984-01-17 | 1985-08-07 | Fujitsu Ltd | Channel control system |
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