Importance

Loading Importance Indicators...

Abstract

An input/output port address selection circuit for a device that couples to a local bus of a computer operates in two modes. In a first mode, the I/O port address is maintained as the last I/O port address saved. In the second mode, the selection circuit changes the I/O port address and saves the change when the circuit is reset. A computer user resolves I/O port address conflicts by placing the selection circuit in the second mode then resetting the system until the conflict is resolved and the system works properly. The selection circuit is then placed and left in the first mode so that the non-conflicting address is reused. Non-volatile memory, an electrically erasable-programmable read-only memory, is used for saving an index which indicates the last I/O port address set. The non-volatile memory is changed when the selection circuit is operated in the second mode.

Loading the Abstract Image...

First Claim