External Interrupts on Basic Atom Pro

I am just trying to verify some of the external Interrupts on the 28 pin Atom Pro.

We have the six WKP interrupts 0-5 on IO pins P0 through P5.

The manual also implies we have the 4 external Interrupts IRQ0-3, but so far I find:
IRQ1 -> P8
IRQ2 -> P18
IRQ3 -> P19

But I don’t see IRQ0 on any external pins. Is this correct?

Thanks

IRQ0 is on the S_IN/S_OUT pin.

Ok, So it does not sound like I could use it for my purposes.

Thanks