System with virtual update capable read-only memory
US5644782A · kind A · utility
53Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 17, 1994 |
| Grant date | Jul 1, 1997 |
| Priority date | — |
| Expiry date | Oct 17, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/40
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system having a virtual update capable read-only memory, includes a data storage system (270), and a device driver (272) which interfaces with the data storage system (270). The data storage system (270) includes a read-only memory device (274) which stores primary data, and an auxiliary memory device (276) which stores supplementary data reflecting updates to the primary data. The device driver (272) has a read handler which provides a response to a read request consisting of a combination of primary data from the read-only memory device (274) and supplementary data from the auxiliary memory device (276).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.