Method and system including memory patching utilizing a transmission control signal and circuit

摘要

A data processing system (100, 300) allows an individually mappable word of memory to patch a desired memory location. During operation, a memory system (130) monitors an address/control bus to determine when an access to a specified word in a system memory (120) occurs. When an access to the specified word occurs, address comparators (140) determine if a memory location to be patched is being accessed, and provides an active signal to the access control circuit (150), which prevents data flow with the system memory (120) and enables the data flow with a separate memory (170) by controlling a transmission gate 115. Therefore, the data access occurs from the separate memory and not the system memory.