On 28 Dec 2006 at 13:50, Gordon JC Pearce wrote: > And if I remember right, you don't need to even think about the 16-byte > FIFO - it does just look like an 8250 shunting out bytes as fast as it > can. Handy if your ISR doesn't like small fast bursts of data. There's also a 16560 with a 32-byte FIFO; somewhat harder to find. Cheers, Chuck