DCONS_CROM(4) BSD Kernel Interfaces Manual DCONS_CROM(4)NAME
dcons_crom -- Configuration ROM stub for dcons(4)SYNOPSIS
device dcons_crom
device dcons
device firewire
DESCRIPTION
The dcons_crom exposes the buffer address of dcons(4) through the Configuration ROM of firewire(4). This address is supposed to be used by
dconschat(8).
SEE ALSO dcons(4), firewire(4), fwohci(4), dconschat(8), fwcontrol(8)AUTHORS
Hidetoshi Shimokawa <simokawa@FreeBSD.org>
BUGS
If you load dcons_crom.ko manually after the system is booted, you may have to initiate a bus reset using ``fwcontrol -r'' to update the Con-
figuration ROM.
BSD June 16, 2003 BSD
Check Out this Related Man Page
DCONS(4) BSD 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 console 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.
If you want to use dcons(4) as a gdb(1) port, add the following line into loader.conf(5):
dcons_gdb="1"
SEE ALSO dcons_crom(4), ddb(4), firewire(4), fwohci(4), gdb(4), ttys(5), conscontrol(8), dconschat(8), fwcontrol(8)AUTHORS
Hidetoshi Shimokawa <simokawa@FreeBSD.org>
BUGS
This driver is currently under development.
BSD January 26, 2008 BSD