A mechanism is provided for software configuration of ISA bus cards or other devices connected to a computer processor by a bus that does not provide for sharing of an address by multiple devices. Such a device is configured under software control by selecting multiple addresses commonly used by a read-only...http://www.google.de/patents/US5522086?utm_source=gb-gplus-sharePatent US5522086 - Software configurable ISA bus card interface with security access read and write sequence to upper data bits at addresses used by a game device
