Method and apparatus for using a RAM memory block to remap ROM access requests
US7243206B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2003 |
| Grant date | Jul 10, 2007 |
| Priority date | — |
| Expiry date | Dec 15, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/2022
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and data processing apparatus for remapping selected data access requests issued by a processor for accessing data items stored on a ROM. The method comprises the following steps: storing at least one replacement data item corresponding to at least one data item and different to said at least one data item in a portion of a RAM memory block, said RAM memory block being accessible by said processor, and said portion having been defined for storage of said at least one replacement data item; intercepting a data access request from said processor to said ROM; comparing at least a portion of an address of said intercepted data access request with a stored at least one identifier, said stored at least one identifier identifying an address of at least one data item stored on said ROM, and depending on said comparison either: remapping said data access request to said RAM memory block, such that a replacement data item stored on said memory block is accessed if said comparison indicates said at least a portion of an address to correspond to an address identified by said at least one identifier; or if said comparison indicates said at least a portion of an address not to be an add…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.