westfw:
Does it like 500kbps?
Nope. Apparently only "standard" bitrates. I can't tell whether it's a MacOS thing or an FTDI driver thing
(FTDI claims to support non-standard speeds, but when I look for details, all the info is about the windows driver(s))
I'm guessing it is a MacOS thing.
From what I remember from decades ago, and a brief google,
the unix ioctls only support standard bit rates,
but in more recent times there is "kludge" that has been done,
where a different field is overloaded with the desired bitrate if it is non standard.
Apple may not support this.
UGLY, but maybe this will help:
--- bill