7.2. Example Two

Dependent functions can be used to express relationships between resources that are interdependent. For example, consider a card that may be configured to use I/O Port 0x0300 and IRQ 5 or I/O Port 0x0310 and IRQ 7, this device has the following resource data structure:

     TAG Plug and Play Version Number
     TAG Identifier String
     TAG Logical Device ID
     TAG Start DF (Length 0)
          TAG I/O Format (Length 4, Min Base 0x0300, Max Base 0x0300)
          TAG IRQ Format (MASK IRQ 5)
     TAG Start DF (Length 0)
          TAG I/O Format (Length 4, Min Base 0x0310, Max Base 0x0310)
          TAG IRQ Format (MASK IRQ 7)
     TAG End DF
     TAG END Tag