Firmware resident in electrically erasable programmable read only memory ("EEPROM") can be updated by a user while maintaining the intelligence of a computer system during the updating process by a control logic device. The control logic device decodes address and control signals to provide a hardware...http://www.google.com/patents/US5210854?utm_source=gb-gplus-sharePatent US5210854 - System for updating program stored in EEPROM by storing new version into new location and updating second transfer vector to contain starting address of new version
