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DCONS(4)	       FreeBSD Kernel Interfaces Manual		      DCONS(4)

NAME
     dcons -- dumb console device driver

SYNOPSIS
     To	compile	this driver into the kernel, place the following lines in your
     kernel configuration file:

	   options GDB
	   device firewire
	   device dcons

     Alternatively, to load the	driver as a module at boot time, place the
     following line in your kernel configuration file:

	   options GDB

     and in loader.conf(5):

	   dcons_load="YES"

DESCRIPTION
     The dcons device is a simple console device which just reads from and
     writes to an allocated buffer for input and output	respectively.  It is
     of	no use by itself and it	is supposed that the buffer is accessed	via a
     bus like firewire(4) or kvm(3) for	interaction.

     The buffer	consists of 4 channels.	 There are 2 ports, one	for the	con-
     sole TTY and another is GDB port, then each port has an input channel and
     an	output channel.

FILES
     /dev/dcons
     /etc/ttys

EXAMPLES
     If	you want to run	getty(8) on dcons, insert the following	line into
     ttys(5) and send a	HUP signal to init(8) using kill(1).

	   dcons   "/usr/libexec/getty std.9600"   vt100   on  secure

     Once the fwohci(4)	device is initialized to allow physical	access,	the
     buffer can	be accessed from another host via a firewire(4)	bus using the
     dconschat(8) application.	See dconschat(8) for more details.

SEE ALSO
     dcons_crom(4), ddb(4), firewire(4), fwohci(4), ttys(5), conscontrol(8),
     dconschat(8), fwcontrol(8)

AUTHORS
     Hidetoshi Shimokawa <simokawa@FreeBSD.org>

BUGS
     This driver is currently under development.

FreeBSD	10.1			October	7, 2005			  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | FILES | EXAMPLES | SEE ALSO | AUTHORS | BUGS

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