An initial polling sequence for configuring a modular computer system employing a system bus for interconnecting the CPU and various modules attached to the bus. At the beginning of the polling sequence, a bus base address register in each module is preset to a port 0 address by the CPU. A POLL signal...http://www.google.de/patents/US4727475?utm_source=gb-gplus-sharePatent US4727475 - Self-configuring modular computer system with automatic address initialization
