Help needed with IoConnectInterrupt, HalGetInteruptVector Hal*...

Hi,
Can someone tell me how can I get data (parameters) for functions
HalGetInterruptVector,
then IoConnectInterrupt and functions of that group.
The only sure thing is that I’m doing with Isa bus, SerialControler and COM2
port.
From HalGetInterruptVector I will get Vector, Irql and Affinity, but I
don’t know how to fill in this function. And after all I need InterruptMode
for IoConnectInterrupt

I’m not able to connect interrupt for my driver that is doing DMA for serial
port (if that is possible) NT4 platform.
Somehow I leck always an information or two and examples shown on DDK are
not helping me much. Can someone help me?

Regards,
Nenad Prekupec