Conference 7.286::fddi

    >>	Please, could someone tell how many IRQs numbers are there available
    >>for configuration in our FDDI PCI adapter ?
    
    All of them.  Single function PCI devices have a single interrupt line on
    the bus.  It's called INTA.  Intel-based systems then map the INTA line
    on a given PCI slot to an IRQ (5, 9, 11, etc).  This means that the
    DEFPA will support any IRQ since (to the DEFPA) an IRQ is meaningless.
    
    -Larry

    Larry,
    
    	It fits OK to the BID specs (at least 8 IRQs available) that the
    VAR is on. But they need this statement documented to show to their
    customer. Could you give me the pointer where I can find it ?
    
    Thank you again.
    
    Evaldo.
    

The IRQ is a function of the motherboard and how it maps INT A to an IRQ
for a given PCI slot.  So you will need to contact the manufacturer of the
PC's motherboard for the answer.

    The following is taken from a mail message to the CSC rep handling this
    call.  For RISC-based systems, the interrupt support is even easier
    because the 0-15 limit on Intel is not-applicable.
    
       - Larry
    
    
    As we've discussed on the telephone, the entire DEFPA family (-AA, -DA,
    -UA) supports a range of 0-254 interrupt vectors.  For Intel-based
    systems that use a primary and secondary PIC, the interrupts (also
    known as "IRQ's") range from 0-15.  The DEFPA hardware will support all
    of these IRQ's.
    
    It is then up the system motherboard, operating system, and DEFPA
    device driver being used as to how many interrupts are supported,
    whether shared interrupts are supported, and whether multiple DEFPA
    instances are supported.  This is further documented on a DEFPA driver
    basis in the \CONFIG\README.TXT file on the latest DEFPA driver kit
    (v2.5):
    
        	KALI::PCDRIVERS:[DEFPA.RELEASE]FPKIT250.ZIP
    
    For specific configuration information, you'll need to provide the
    system, operating system, and device driver to be used.  In general,
    all of our "server-based" device drivers support interrupt sharing and
    up to 8 DEFPA's installed in a system.  Again, this information can be
    found in \CONFIG\README.TXT.
    
    If you have further questions, please let me know.
    
    Regards.
    
    Larry Stefani
    FDDI Team Leader
    Adapter Product Group
    Network Product Business

    Thank you very much. This last note helped a lot.
    
    Regards.
    
    Evaldo.
    SE/NPB/LACT/Brazil