2 .\" $FreeBSD: src/share/man/man4/screen.4,v 1.14.2.9 2001/08/17 13:08:39 ru Exp $
9 .Nd pc display interface
13 are obtained through the device files
17 Each of these files correspond to a separate
19 All virtual console devices can be open at once, but only one is
21 The active virtual console "owns" the keyboard and
24 Output to a virtual console that not currently is on the display is
25 saved in a buffer that holds a "screenfull" (normally 25) lines.
28 (the original console device) is echoed to
31 To switch between the virtual consoles one uses the sequence
33 which means hold down ALT and press one of the function keys.
35 virtual console with the same number as the function key is then
36 selected as the current virtual console, and given exclusive use of
37 the keyboard and display.
38 This switch sequence can be changed via
39 the keyboard mapping ioctl call (see
42 The console allows entering values that are not physically
43 present on the keyboard via a special keysequence.
44 To use this facility press and hold down ALT,
45 then enter a decimal number from 0-255 via the numerical keypad, then
47 The entered value is then used as the ASCII value for one
49 This way it is possible to enter any ASCII value.
50 The console driver also includes a history function.
52 pressing the scroll-lock key.
53 This holds the display, and enables the cursor
54 arrows for scrolling up and down through the last scrolled out lines.
56 The console understands a subset of the ANSI x3.64 character
58 For compatibility with the old pccons, the PC3 character
59 sequences is also supported.
61 ANSI Seq Function Termcap entry
62 ======= ======= ===================================== ==============
64 -- E7 Save cursor position sc
66 -- E8 Restore saved cursor position rc
70 -- EM move cursor up 1 line, --
73 CUU E[nA move cursor up n lines up/UP (ku)
75 CUD E[nB move cursor down n lines do/DO (kd)
77 CUF E[nC move cursor right n characters nd/RI (kr)
79 CUB E[nD move cursor left n characters --/LE (kl)
81 HPA E[n` move cursor to character position n ch
83 HPR E[na move cursor right n characters --
85 VPA E[nd move cursor to line n cv
87 VPR E[ne move cursor down n lines --
89 CPL E[nF move cursor to start of line, -- (@7)
92 CNL E[nE move cursor to start of line, nw
95 CUP E[y;xH Move cursor to x, y cm
97 HVP E[y;xf Move cursor to x, y --
99 CBT E[nZ Move cursor back n tab stops bt (kB)
101 IL E[nL Insert n blank lines al/AL
103 ICH E[n@ Insert n blank characters ic/IC
105 DL E[nM Delete n lines dl/DL
107 DCH E[nP Delete n characters dc/DC
109 ED E[nJ Erase part or all of display: cd
110 n=0 from cursor to end of display,
111 n=1 from begin of display to cursor,
114 EL E[nK Erase part or all of line: ce
115 n=0 from cursor to end of line,
116 n=1 from begin of line to cursor,
119 ECH E[nX Erase n characters ec
121 SU E[nS Scroll display n lines up (forward) sf/SF
123 SD E[nT Scroll display n lines down (reverse) sr/SR
126 SGR E[nm Set character attributes: --
127 n= 0 normal attribute (all off)
128 n= 1 bold (highlight)
129 n= 4 underscore (if supported by HW)
130 n= 5 blink (if supported by HW)
133 n= 24 remove underscore
136 n= 3X set ANSI foreground color
138 n= 4X set ANSI background color
144 X=6 cyan X=7 light grey
145 X=9 reset to the normal color
147 -- E[s Save cursor position sc
149 -- E[u Restore saved cursor position rc
151 -- E[x Reset normal colors and attributes --
152 to their default values
154 -- E[nz Switch to virtual console n --
156 -- E[1;nx Set normal ANSI background color --
159 -- E[2;nx Set normal ANSI foreground color --
162 -- E[3;nx Set normal video attribute directly --
163 to n (n from 0 to 255)
165 -- E[5;nx Set normal ANSI reverse background --
166 color to n (see table)
168 -- E[6;nx Set normal ANSI reverse foreground --
169 color to n (see table)
171 n= 0 black n= 8 dark grey
172 n= 1 red n= 9 light red
173 n= 2 green n=10 light green
174 n= 3 brown n=11 yellow
175 n= 4 blue n=12 light blue
176 n= 5 magenta n=13 light magenta
177 n= 6 cyan n=14 light cyan
178 n= 7 light grey n=15 white
180 -- E[7;nx Set normal reverse video attribute --
181 directly to n (n from 0 to 255)
183 -- E[=p;dB Set bell pitch (p) and duration (d), --
184 pitch is in units of 840 nS,
185 duration is units of 0,1 S.
187 -- E[=tC Set cursor type (see table) --
189 t=0 normal non-blinking
191 t=2 custom non-blinking
194 -- E[=s;eC Set custom cursor shape, where --
195 s is the starting and e is the ending
196 scanlines of the cursor.
198 -- E[=nA Set the border color to n --
199 (see table) (if supported by HW)
201 -- E[=nF Set normal foreground color to n --
204 -- E[=nG Set normal background color to n --
207 -- E[=nH Set normal reverse foreground color --
210 -- E[=nI Set normal reverse background color --
213 n= 0 black n= 8 dark grey
214 n= 1 blue n= 9 light blue
215 n= 2 green n=10 light green
216 n= 3 cyan n=11 light cyan
217 n= 4 red n=12 light red
218 n= 5 magenta n=13 light magenta
219 n= 6 brown n=14 yellow
220 n= 7 light grey n=15 white
222 note: the first E in the sequences stands for ESC (0x1b)
225 .An S\(/oren Schmidt Aq Mt sos@FreeBSD.org