Reset of peripheral printing devices after a hot plug state
US5379437A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1992 |
| Grant date | Jan 3, 1995 |
| Priority date | — |
| Expiry date | Nov 16, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4081
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A controller in a personal computer operating system continuously monitors for signals indicating continued powering of an attached keyboard, mouse or other pointing device. Loss of this signal is caused by the accidental or intentional loss of power to the external device or by physically disconnecting the device. Absence of the signal causes the setting of a timeout bit in the device status byte. When the attached device signals that it has successfully become re-powered, the initialization program routine of the operating system is recalled so as to return the device to on-line status without requiring a restart of the entire operating system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.