A multi-module, multi-port memory system includes modules having semiconductor memory circuits which require periodic refreshing to retain the contents stored therein. Priority circuits resolve conflicts between the multi-port access of the memory modules and the refreshing requirements of semiconductor...http://www.google.fr/patents/US4028675?utm_source=gb-gplus-shareBrevet US4028675 - Method and apparatus for refreshing semiconductor memories in multi-port and multi-module memory system
Method and apparatus for refreshing semiconductor memories in multi-port and ...