Lpc2000

I'll hop in here for a second.  As an added note, I believe changing the
VIC as the original post stated, will just un-vector the interrupt.  I
would suggest the following sequence.
1) disable global IRQ
2) disable/enable external interrupt (you may need to do this by changing
   the pin to a GPIO input in the appropriate PINSEL register.  GURUs jump
   in here.)
3) enable global IRQ

Regards
-Bill Knight
R O SoftWare