Maciej, > > The 'di' is there to be atomic... > > Hmm, is the remaining minority of the OSes, that can't manage the > sequence, important enough to add such an instruction? Perhaps not. The case I always suggest is that of a serial port transmit interrupt handler, which often wants to disable the TxReady interrupt when it finds there's no more data to send. There's almost always a way to do that without changing the SR interrupt mask, of course... -- Dominic
