[ros-kernel] BusInterruptLevel/BusInterruptVector

[Rick Parrish]

Ge van Geldorp wrote:

>What's the difference between the BusInterruptLevel and
>BusInterruptVector parameters passed to HalGetInterruptVector? The NT4
>DDK says:
>
>BusInterruptLevel
>Specifies the bus-specific interrupt level. 
>BusInterruptVector
>Specifies the bus-specific interrupt vector.
>  
>
I'm guessing the "level" is the actual IRQ input to the CPU from the 
hardware device.

I'm guessing the "vector" is the index into the IDT of the actual 
interrupt service routine.

Example: IRQ 3 (the level) is mapped to interrupt 0x33 (the vector) and 
IRQ 4 is mapped to interrupt 0x34.

... but I could be wrong on the DDK terminology for this.

-rick