19200 baud on the Unix PC serial port
Bill Mayhew
wtm at neoucom.UUCP
Sun Dec 31 08:30:50 AEST 1989
Actually, the token for 19200 bps is "EXTA". I believe that comes
from the DRV-11 (or something similar) on the PDP-11 that supported
two _external_ clock rates, which were supposed to have been
supplied from a clock generator in the modem. The DRV-11 is a
single line serial RS-232C or current loop interface.
If you look in /usr/include/sys/termio.h, you'll see both EXTA and
EXTB defined. EXTB is not suppoted by the kernel, according to a
comment in termio.h; if EXTB worked, it would be for 38400 bps.
Bill
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