Dynamically changing a system I/O configuration definition
US5170472A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1991 |
| Grant date | Dec 8, 1992 |
| Priority date | — |
| Expiry date | Mar 28, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F15/161
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A mechanism for changing the system I/O configuration definition in the channel subsystem of a data processing system without having to do a power on reset operation. The data processing system includes one or more central processing units, an I/O processor, a storage addressable by the central processors and the I/O processor, and a command mechanism for creating command-request blocks in the storage, each of which contains a requested command and data for the I/O Processor to add, delete or change elements of the I/O configuration definitions of the channel subsystem. Response-blocks are created in the storage for passing status information from the I/O processor to the central processing unit(s) indicating either successful execution of the requested command or that the I/O configuration definitions were unchanged by the command of the request-block, or when associated functions may have been performed in the execution of the command of the request-block by the I/O processor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.