TTY Port Server
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¬	Other Devices

Overview:

The TTY Port Server Device Driver is designed to export serial port interfaces from the operating system.  In particular, this device driver implements a "TTY layer" for serial port devices.

This device driver will create /dev/tty* device nodes for each serial port device it finds.  It assigns device node names in the order that it finds serial ports, starting with /dev/ttya and continuing until all serial ports are assigned or until /dev/ttyz is reached.  Each serial port found will have a family of seven device nodes created:

·	/dev/ttya
·	/dev/ttyda
·	/dev/ttydfa
·	/dev/ttyfa
·	/dev/cua
·	/dev/cufa
·	/dev/cudfa

Each of these device nodes are described in the man page for zs. 

The TTY Port Server is an indirect device driver, which means that it doesn't directly control hardware.  As such, it needs only one instance configured, regardless of the number of serial ports it exports.

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See also

·	The man page for  zs . 

·	The topics in Configure's on-line help for the Serial Port Device Driver. 

·	Configure's on-line help for the TTY Port Server Device Driver. 

·	"Add a Device" in Configure's on-line help.

·	See NeXTAnswer 1824 for general information on installing and configuring device drivers.