1) The Keil support base implies that you can... in fact there is conflicting information. In one place they do say that you have to write a stub at the 'original' vector location to jump to the new if you relocate the vector table. Our goal is to free all of internal flash memory block 0, so that doesn't help. In other places it's not mentioned as a requirement. In reality it behaves as you suggest....

2) irq is used around here as shorthand for interrupt. Not totally correct perhaps... I've seen it represent interrupt request as well.

Bill