VJ> a maximum of 115200. This is also the maximum 
 VJ> supported on standard AT hardware (input clock = 
 VJ> 1.8432 MHz, internal divisor = 16 and software 
 VJ> selected divisor = 1).

This is the maximum _possible_,   but not the maximum _supported_.  The
maximum supported on IBM standard AT hardware is 19200 (I just looked it up
in an old IBM tech ref I have here).

Because OS/2 can overlap i/o to more than one device,  it is most efficient
to drive the serial port at exactly the speed (or just slightly higher)
than your modem can send [already compressed] data;19200 (9.6/144.4 modem)
or 38400 (28.8 modem) are good choices for a bbs.  If you have a SLIP
connection (ie: sending lots of uncompressed data),  you might want to push
it higher to take advantage of a modems firmware compression;  but this is
a big "if" on most of the serial cards I see shipped with PC's
these days.

On cheap hardware even 38400bps (even though you can program the uart to do
115kbps) will not work cleanly with a NULL modem calble (one of those IDE
controllers with serial/parallel/game port all in one for example).


--- Maximus/2 2.02p1