A data processing system includes a central processing unit, a main memory, and a communication subsystem servicing a number of communication lines. The communication subsystem includes a free running timer, a line microprocessor for communicating with the communication lines and a shared memory, and...http://www.google.fr/patents/US4482982?utm_source=gb-gplus-shareBrevet US4482982 - Communication multiplexer sharing a free running timer among multiple communication lines
Communication multiplexer sharing a free running timer among multiple ...
