Virtual device driver
US6546434B1 · kind B1 · utility
7Cited by
7References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 1999 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Apr 12, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/102
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A virtual device driver for processing serial communications in a protected operating system. The virtual device driver adds a time-stamp to each character received at Ring-zero level of the operating system architecture. The time-stamp value is compared to a predetermined maximum acceptable time interval to determine if a valid packet was received.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.