SAB(4)               OpenBSD Programmer's Manual (SPARC64)              SAB(4)

NAME
     sab - Infineon SAB82532 (ESCC2) serial communications driver

SYNOPSIS
     sab* at ebus?
     sabtty* at sab?

DESCRIPTION
     The sab is an Infineon (formerly Siemens) SAB82532 (ESCC2) serial inter-
     face chip used in PCI-based UltraSPARC Sun workstations.  The ESCC2 pro-
     vides two independent input/output channels per instance.  These chips
     are normally used to provide RS-423 and RS232 serial ports for general
     purpose use.

     The sab driver supports all of the standard tty(4) ioctl calls.  The sta-
     tus of the DTR, RTS, CTS, and DCD signals can be queried with TIOCMGET
     command, but, due to limitations in the hardware, only the DTR and RTS
     signals can be modified with TIOCMSET, TIOCMBIC, and TIOCMBIS ioctl(2)
     commands.

FILES
     /dev/ttyh[0-1]  Serial ports

SEE ALSO
     ioctl(2), ebus(4), intro(4), tty(4)

HISTORY
     The sab driver first appeared in OpenBSD 3.1.

BUGS
     The sab does not support cua minor devices.

OpenBSD 4.7                      May 31, 2007                                1
