Lpc2000

Hello -
I've recently been working with nesting of interrupts, but I can't
seem to get it to work.  The examples I've come across don't work for
me, or are inappropriate.  Such as using LR as a scratch register
(throwing away the return address from the IRQ), or not clearing
interrupts before entering a nesting state (one example doesn't clear
the VIC until after the nested state ends, which just has interrupts
disabled throughout).

Has anybody really gotten nested interrupts working?  Any ideas would
be greatly appreciated.

Thanks!