In article <199705201823.UAA00409@sheep.simplex.nl> Onno van der Linden said:
>> Now the question: Do you think filling up all the 16 bytes at once is a
>> good idea with these dumb UART chips?  [...]
>
>My first thought is that creating overflows on the other site by filling
>16 bytes at once shouldn't be possible.

Apparently my QMS PS-800 laser printer doesn't know that.  It worked
fine with a 16450.  When I upgraded to a 16550, it started dropping
characters.  When I modified the com driver to fill the TX fifo a 
single byte at a time, it started working again.
-- 
Andreas Gustafsson, gson@araneus.fi