The invention relates to the field of data processing systems and provides a method and system to enable replacement of memory modules (MU.sub.i) connected to a bus (MB) without interrupting the functioning of the system, wherein for any writing request addressed to a module to be replaced (MU.sub.i),...http://www.google.de/patents/US5235687?utm_source=gb-gplus-sharePatent US5235687 - Method for replacing memory modules in a data processing system, and data processing system for performing the method