Very interesting IRQ table

[Braxus]

Seems like I have around 21 IRQs available. At least that's what W2K lists them as. Guess that ACPI stuff really does wierd stuff to resource control! Check this out. If memory serves me right, there is genreally 16 IRQs available from 0-15.

IRQ Listing

 

[Doh!]

Although the IRQ numbers are not sequential, if only count the number of IRQs used in your system, it's only 15. Don't know if that means anything but I'm sure someone can provide an explanation.

 

[Braxus]

Yeah that I see, but IRQ18, IRQ19, etc.? isn't that a little wierd?

 

[ctll]

yeah, w2k is goofy about irq's. all my stuff is listed as being on IRQ 9

 

[AndyHui]

Supposedly Win2K can use IRQ9 as a gateway to other virtual IRQs above IRQ15.

 

[Spiff]

the standard hw assigned limit on irq's is 1 - 15.

however, with acpi support, win2k allow for up to 254 irq's i believe. these are "virtual irq's". this is a good. it eliminates the hassle of trying to fit all those hw devices inside your machine and trying to work out the damn irq conflicts. win2k does this for you.

so be happy