Channel control system having device control block and corresponding device control word with channel command part and I/O command part
US5031091A · kind A · utility
79Cited by
9References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 8, 1989 |
| Grant date | Jul 9, 1991 |
| Priority date | — |
| Expiry date | Nov 8, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/385
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A device control word including a channel command part and an I/O command part is prepared in a main storage unit, and sent to a channel unit together. The channel command part has a common format for different types of I/O devices or I/O controllers thereof, while the I/O command part may have a different format for each type of the I/O devices. Thereby, the same channel unit can be used for or connected to different kinds of I/O controllers by simply modifying software in a central processing unit to correspond to respective I/O controllers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.