Method for patching a read-only memory and a data processing system comprising a means of patching the read-only memory based on patch contexts

摘要

A method for patching a read-only memory (ROM) includes providing multiple patch contexts in a patch contexts memory, with the ROM providing information for a data processing system. Each patch context defines a different set of patches, with each patch comprising a patch address and corresponding patch data. The patch contexts are activated one at a time. Each time the information is patched according to the currently activated patch context.