Espruino interrupts

OK, I found it in the FAQ page: http://www.espruino.com/FAQ

ESPRUINO DOESN'T SUPPORT SOME OF MY CHIP'S FUNCTIONALITY. CAN I USE IT ANYWAY?

Yes! We have added peek32 and poke32 instructions which allow you to directly access anything >in the ARM's address space.

You won't be able to use interrupts, but other hardware (including DMA) can be set up and used this way.

Thanks for the replies @thomc and @AllObjects, but I'm afraid I don't understand enough yet to reconcile your comments with the FAQ. Pretty sure I read that the Arduino can sleep and wake up on an interrupt and I was hoping to have that functionality on my Espruino Picos. From what you are saying, I am guessing it can, but I'm wondering what the limitations are.

@AllObjects, I used to write a lot of ASP web pages with JavaScript back in the late 90s. Also wrote a lot of C/C++/C#, as well as a bunch of APL a long time ago :)