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.Dd January 18, 2010
.Dt SAB 4 sparc64
.Os
.Sh NAME
.Nm sab ,
.Nm sabtty
.Nd
.Tn Infineon
82532 Enhanced Serial Communication Controller (ESCC2)
.Sh SYNOPSIS
.Cd "sab*    at ebus?"
.Cd "sabtty* at sab? channel ?"
.Sh DESCRIPTION
The
.Nm
driver provides
.Tn TTY
support for the
.Tn Infineon
(previously
.Tn Siemens )
82532 serial communications interface found in many
.Tn Sun Ultra
workstations and servers.
.Pp
Input and output speeds for each line may be set to any baud rate in the
following list: 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400,
4800, 9600, 19200, 38400, 57600, 76800, 115200, 153600, 230400, 307200,
460800, 614400, 921600.
.Sh NOTES
The speed cannot be changed on the ports connected the
.Tn Remote System Control
(RSC) on a
.Tn Sun Enterprise[tm] 250 Server
(ttyh2 and ttyh3).
These ports are fixed at 115200 baud.
.Sh FILES
.Bl -tag -width XdevXttyh0X
.It Pa /dev/ttyh[0123]
serial ports
.El
.Sh DIAGNOSTICS
.Bl -tag -width indent
.It sab*: ring overflow
The software input
.Qq ring
has overflowed.
This usually means input flow-control is not configured correctly
.Pq i.e. incorrect cable wiring .
.El
.Sh SEE ALSO
.Xr tty 4 ,
.Xr zstty 4
.Sh HISTORY
The
.Nm sabtty
driver first appeared in
.Ox 3.1
and was then ported to
.Nx 2.0 .
.Sh AUTHORS
.An Jason L. Wright