A method and arrangement for controlling input/output (I/O) operations in a computer system provides multiple PC card controllers but allows legacy software to be used. A PCI bus is coupled to a central processing unit, and an ISA bus is coupled to the PCI bus by a bridge. At least one PC card...http://www.google.de/patents/US5724529?utm_source=gb-gplus-sharePatent US5724529 - Computer system with multiple PC card controllers and a method of controlling I/O transfers in the system 
