449 lines
13 KiB
Groff
449 lines
13 KiB
Groff
.\"
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.\" Copyright (c) 1999
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.\" Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer as
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.\" the first lines of this file unmodified.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $Id: syscons.4,v 1.2 1999/05/20 09:56:14 yokota Exp $
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.\"
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.Dd June 30, 1999
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.Dt SYSCONS 4
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.Os FreeBSD
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.Sh NAME
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.Nm syscons ,
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.Nm sc
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.Nd
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the console driver
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.Sh SYNOPSIS
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.Cd "options MAXCONS=N"
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.Cd "options SC_ALT_MOUSE_IMAGE"
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.Cd "options SC_DISABLE_DDBKEY"
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.Cd "options SC_DISABLE_REBOOT"
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.Cd "options SC_HISTORY_SIZE=N"
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.Cd "options SC_MOUSE_CHAR=C"
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.Cd "options SC_NO_CUTPASTE"
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.Cd "options SC_NO_FONT_LOADING"
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.Cd "options SC_NO_HISTORY"
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.Cd "options SC_NO_PALETTE_LOADING"
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.Cd "options SC_NO_SYSMOUSE"
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.Cd "options SC_PIXEL_MODE"
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.Cd "options SC_DFLT_FONT"
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.Cd "makeoptions SC_DFLT_FONT"=\&"_font_name_\&"
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.Cd "device sc0 at isa?"
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.Sh DESCRIPTION
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The
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.Nm
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driver provides multiple virtual terminals.
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It resembles the SCO color console driver.
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.Pp
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The
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.Nm
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driver is implemented on top of the keyboard driver
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.Pq Xr atkbd 4
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and the video card driver
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.Pq Xr vga 4
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and so requires both of them to be configured in the system.
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.Pp
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There can be only one
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.Nm
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device defined in the system.
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.Ss Virtual Terminals
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The
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.Nm
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driver provides multiple virtual terminals which appear as if they were
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separate terminals.
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One virtual terminal is considered current and exclusively
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occupies the screen and the keyboard; the other virtual terminals
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are placed in the background.
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.Pp
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In order to use virtual terminals, they must be individually
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marked ``on'' in
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.Pa /etc/ttys
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so that
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.Xr getty 8
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will recognize them to be active and run
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.Xr login 1
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to let the user to login to the system.
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By default, only the first three virtual terminals are activated in
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.Pa /etc/ttys .
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.Pp
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You press the
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.Em Alt
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key and a switch key to switch between
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virtual terminals.
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The following table summarizes the correspondence between the switch
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key and the virtual terminal.
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.Bd -literal -offset indent
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Alt-F1 ttyv0 Alt-F7 ttyv6 Shift-Alt-F1 ttyv10
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Alt-F2 ttyv1 Alt-F8 ttyv7 Shift-Alt-F2 ttyv11
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Alt-F3 ttyv2 Alt-F9 ttyv8 Shift-Alt-F3 ttyv12
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Alt-F4 ttyv3 Alt-F10 ttyv9 Shift-Alt-F4 ttyv13
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Alt-F5 ttyv4 Alt-F11 ttyv10 Shift-Alt-F5 ttyv14
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Alt-F6 ttyv5 Alt-F12 ttyv11 Shift-Alt-F6 ttyv15
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.Ed
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.Pp
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You can also use the ``nscr'' key (usually the
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.Em PrintScreen
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key on the AT Enhanced keyboard) to cycle available virtual terminals.
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.Pp
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The default number of available virtual terminals is 16.
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This can be changed by the kernel configuration option
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.Em MAXCONS
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(see below).
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.Pp
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Note that the X server usually requires a virtual terminal for display
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purposes, so at least one terminal must be left unused by
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.Xr getty 8
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so that it can be used by the X server.
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.Ss Key Definitions and Function Key Strings
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The
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.Nm
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driver, in conjunction with the keyboard driver, allows the user
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to change key definitions and function key strings.
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The
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.Xr kbdcontrol 1
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command will load a key definition file (known as ``keymap'' file),
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dump the current keymap, and assign a string to a function key.
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See
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.Xr keyboard 4
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and
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.Xr keymap 5
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for the keymap file.
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.Pp
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You may want to set the
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.Ar keymap
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variable in
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.Pa /etc/rc.conf.local
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to the desired keymap file so that it will be automatically loaded
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when the system starts up.
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.Ss Software Font
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For most modern video cards, e.g. VGA, the
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.Nm
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driver and the video card driver allow the user to change
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the font used on the screen.
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The
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.Xr vidcontrol 1
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command can be used to load a font file from
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.Pa /usr/share/syscons/fonts .
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.Pp
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The font comes in various sizes: 8x8, 8x14 and 8x16.
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The 8x16 font is typically used for the VGA card in the 80-column-
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by-25-line mode.
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Other video modes may require different size of font.
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It is better to always load these three sizes of the same font.
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.Pp
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You may set
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.Ar font8x8 ,
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.Ar font8x14
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and
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.Ar font8x16
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variables in
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.Pa /etc/rc.conf.local
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to the desired font files so that they will be automatically loaded
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when the system starts up.
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.Pp
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Optionally you can make a particular font file as the default font.
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See the
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.Em SC_DFLT_FONT
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option below.
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.Ss Screen Map
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If your video card does not support software font, you may still be able
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to have similar effect by re-mapping font hard-wired in the video card.
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Use
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.Xr vidcontrol 1
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to load a screen map file which defines mapping between character codes.
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.Ss Mouse Support and Copy-and-Paste
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You can use your mouse to copy text on the screen and paste it as if
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it is typed by hand.
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You must be running the mouse daemon
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.Xr moused 8
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and enable the mouse cursor in the virtual terminal via
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.Xr vidcontrol 1 .
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.Pp
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Pressing the mouse button 1 (usually the left button) will start selection.
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Releasing the button 1 will end the selection process.
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The selected text will be marked by inverting foreground and
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background colors.
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You can press the button 3 (usually the right button) to extend
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the selected region.
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The selected text is placed in the copy buffer and can be pasted
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at the cursor position by your pressing the button 2 (usually the
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middle button) as many times as you like.
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.Ss Back Scrolling
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The
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.Nm
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driver allows the user to browse the output which has ``scrolled off''
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from the top of the screen.
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.Pp
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Press the ``slock'' key (usually
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.Em ScrllLock
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and/or
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.Em Pause
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keys on many AT Enhanced keyboards) and the terminal is
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in the ``back scrolling'' mode.
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It is indicated by the
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.Em Scroll Lock
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LED.
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Use arrow keys,
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.Em Page Up/Down
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keys and
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.Em Home/End
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keys to scroll buffered terminal output.
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Press the ``slock'' key again to get back to the normal terminal mode.
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.Pp
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The size of the back-scroll buffer can be set by the
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.Em SC_HISTORY_SIZE
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option below.
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.Ss Screen Saver
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The
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.Nm
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driver can be made to put up the screen saver if the current
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virtual terminal is idle, that is, the user is not typing
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on the keyboard nor moving mouse.
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See
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.Xr splash 4
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and
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.Xr vidcontrol 1
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for more details.
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.Sh DRIVER CONFIGURATION
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.Ss Kernel Configuration Options
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The following kernel configuration options control the
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.Nm
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driver.
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.Bl -tag -width MOUSE
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.It Em MAXCONS=N
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This option sets the number of virtual terminals to
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.Fa N .
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The default value is 16.
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.It Em SC_ALT_MOUSE_IMAGE
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This option selects the alternative way of displaying the mouse cursor
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in the virtual terminal.
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It may be vastly costly for some video cards to draw the arrow-shaped
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cursor and you may want to try this option.
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However, the appearance of the alternative mouse cursor may not be
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very appealing.
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.It Em SC_DISABLE_DDBKEY
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This option disables the ``debug'' key (by default, it is
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.Em Alt-Esc ,
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or
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.Em Ctl-PrintScreen
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).
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It will prevent the user from
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entering the kernel debugger DDB by pressing the key combination.
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DDB will still be invoked when the kernel panics or hits a break point
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if it is included in the kernel.
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.It Em SC_DISABLE_REBOOT
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This option disables the ``reboot'' key (by default, it is
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.Em Ctl-Alt-Del
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), so that the casual user may not accidentally reboot the system.
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.It Em SC_HISTORY_SIZE=N
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Sets the size of back scroll buffer to
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.Fa N
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lines.
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The default value is 100.
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.It Em SC_MOUSE_CHAR=C
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Unless the
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.Em SC_ALT_MOUSE_IMAGE
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option above is specified, the
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The
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.Nm
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driver reserves four consecutive character codes in order to display the
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mouse cursor in the virtual terminals in some systems.
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This option specifies the first character code to
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.Fa C
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to be used for this purpose.
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The default value is 0xd0.
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A good candidate is 0x03.
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.It Em SC_PIXEL_MODE
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Adds support for pixel (raster) mode console.
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This mode is useful on some laptop computers, but less so on
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most other systems, and it adds substantial amount of code to syscons.
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If the this option is NOT defined, you can reduce the kernel size a lot.
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See the
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.Em VESA800X600
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flag below.
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.It Em SC_DFLT_FONT
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This option will specify the default font.
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Available fonts are: iso, iso2, koi8-r, cp437, cp850, cp865 and cp866.
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16-line, 14-line and 8-line font data will be compiled in.
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Without this option, the
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.Nm
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driver will use whatever font already loaded in the video card,
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unless you explicitly load software font at startup.
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See
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.Sx EXAMPLE
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below.
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.El
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.Pp
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The following options will remove some features from the
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.Nm
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driver and save kernel memory.
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.Bl -tag -width MOUSE
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.It Em SC_NO_CUTPASTE
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This option disables ``copy and paste'' operation in virtual
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terminals.
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.It Em SC_NO_FONT_LOADING
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The
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.Nm
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driver can load software font on some video cards.
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This option removes this feature.
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.It Em SC_NO_HISTORY
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This option disables back-scrolling in virtual terminals.
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.\".It Em SC_NO_PALETTE_LOADING
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.It Em SC_NO_SYSMOUSE
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This option removes mouse support in the
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.Nm
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driver.
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The mouse daemon
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.Xr moused 8
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will fail if this option is defined.
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This option implies the
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.Em SC_NO_CUTPASTE
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option too.
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.El
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.Ss Driver Flags
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The following driver flags can be used to control the
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.Nm
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driver.
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They can be set either in the kernel configuration file
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.Pq see Xr config 8 ,
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or else in the User Configuration Menu at boot
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time
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.Pq see Xr boot 8 .
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.Bl -tag -width bit_0
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.\".It bit 0 (VISUAL_BELL)
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.\"Uses the ``visual'' bell.
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.\"The screen will blink instead of generating audible sound.
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.\".It bit 1,2 (CURSOR_TYPE)
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.\"This option specifies the cursor appearance.
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.\"Possible values are:
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.\".Bl -tag -width TYPE -compact
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.\".It Em 0
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.\"normal block cursor
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.\".It Em 2
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.\"blinking block cursor
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.\".It Em 4
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.\"underline cursor
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.\".It Em 6
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.\"blinking underline (aka destructive) cursor
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.\".El
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.\".It bit 6 (QUIET_BELL)
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.\"This option suppresses the bell, whether audible or visual,
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.\"if it is rung in a background virtual terminal.
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.It bit 7 (VESA800X600)
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This option puts the video card in the VESA 800x600 dots, 16 color
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mode.
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It may be useful for laptop computers for which the 800x600 mode
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is otherwise unsupported by the X server.
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Note that in order for this flag to work, the kernel must be
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compiled with the
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.Em SC_PIXEL_MODE
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option explained above.
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.\"Note also that the ``copy-and-paste'' function is not currently supported
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.\"in this mode and the mouse pointer will not be displayed.
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.El
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.Sh FILES
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.Bl -tag -width /usr/share/syscons/xxxxyyyyzzz -compact
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.It Pa /dev/console
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.It Pa /dev/consolectl
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.It Pa /dev/ttyv?
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virtual terminals
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.It Pa /etc/ttys
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terminal initialization information
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.It Pa /usr/share/syscons/fonts/*
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font files
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.It Pa /usr/share/syscons/keymaps/*
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key map files
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.It Pa /usr/share/syscons/scrmaps/*
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screen map files
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.El
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.Sh EXAMPLE
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As the
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.Nm
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driver requires the keyboard driver and the video card driver,
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the kernel configuration file should contain the following lines.
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.Pp
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.Bd -literal -offset indent
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device atkbdc0 at isa? port IO_KBD
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device atkbd0 at atkbdc? irq 1
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device vga0 at isa? conflicts
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device sc0 at isa?
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pseudo-device splash
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.Ed
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.Pp
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If you do not intend to load the splash image or use the screen saver,
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the last line is not necessary, and can be omitted.
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.Pp
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Note that the keyboard controller driver
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.Nm atkbdc
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is required by the keyboard driver
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.Nm atkbd .
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.Pp
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The following example adds the font files
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.Pa cp850-8x16.fnt ,
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.Pa cp850-8x14.font
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and
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.Pa cp850-8x8.font
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to the kernel.
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.Pp
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.Dl "options SC_DFLT_FONT"
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.Dl "makeoptions SC_DFLT_FONT"=\&"cp850\&"
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.Dl "device sc0 at isa?
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.Pp
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.\".Sh DIAGNOSTICS
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.\".Sh CAVEATS
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.Sh BUGS
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This manual page is incomplete and urgently needs revision.
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.Sh SEE ALSO
|
||
.Xr kbdcontrol 1 ,
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.Xr kldload 1 ,
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.Xr login 1 ,
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.Xr vidcontrol 1 ,
|
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.Xr atkbd 4 ,
|
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.Xr atkbdc 4 ,
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.Xr keyboard 4 ,
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.Xr screen 4 ,
|
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.Xr splash 4 ,
|
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.Xr ukbd 4 ,
|
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.Xr vga 4 ,
|
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.Xr keymap 5 ,
|
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.Xr rc.conf 5 ,
|
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.Xr screenmap 5 ,
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.Xr ttys 5 ,
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.Xr config 8 ,
|
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.Xr getty 8 ,
|
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.Xr moused 8 .
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.Sh HISTORY
|
||
The
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.Nm
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driver first appeared in
|
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.Fx 1.0 .
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.Sh AUTHORS
|
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The
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.Nm
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||
driver was written by
|
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.An S<EFBFBD>ren Schmidt Aq sos@FreeBSD.org .
|
||
This manual page was written by
|
||
.An Kazutaka Yokota Aq yokota@FreeBSD.org .
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