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Subject: syscons-1.3 Date: Sat, 29 Jan 94 23:33:50 MET But here is the (hopefully) final syscons-1.3.... .... I've changed sgetc so it works as the pccons parallel (it now uses a scgetc internally). [ There were a couple changes that Bruce Evans sent me that were applied to this version along with some changes that S'ren didn't incorporate into the final version. There will be only minor changes if anything from this version to his final release. ]
158 lines
4.2 KiB
Groff
158 lines
4.2 KiB
Groff
.Dd April 7, 1993
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.Dt SCREEN 4
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.Os FreeBSD
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.Sh NAME
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.Nm screen
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.Nd pc display interface
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.Sh DESCRIPTION
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Access to the
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.Ar virtual consoles
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are obtained through the device files
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ttyv0 - ttyvb in /dev.
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Each of these files correspond to a seperate
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virtual console.
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All virtual console devices can be open at once, but only one is
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active at a time. The active virtual console "owns" the keyboard and
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display screen.
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.Pp
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Output to a virtual console that not currently is on the display is
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saved in a buffer that holds a "screenfull" (normally 25) lines.
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Any output written to
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.Ar /dev/console
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(the original console device) is echoed to /dev/ttyv0.
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.Pp
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To switch between the virtual consoles one uses the sequence
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.Ar ALT+Fn
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, which means hold down ALT and press one of the function keys. The
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virtual console with the same number as the function key is then
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selected as the current virtual console, and given exclusive use of
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the keyboard and display. This switch sequence can be changed via
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the keyboard mapping ioctl call (see keyboard.4)
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.Pp
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The number of virtual consoles is changeable in the system config
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file, and need recompilation of the kernel to take any effect. The
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default is 12.
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The console allows entering values that are not physically
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present on the keyboard via a special keysequence.
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To use this facility press and hold down ALT,
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then enter a decimal number from 0-255 via the numerical keypad, then
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release ALT. The entered value is then used as the ASCII value for one
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character. This way it is possible to enter any ASCII value.
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The console understands a subset of the ANSI x3.64 character
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sequences. For compatibility with the old pccons, the PC3 character
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sequences is also supported.
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.Pp
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.Bd -literal
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ANSI Seq Function Termcap entry
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======= ======= ===================================== ==============
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CUU E[nA move cursor up n lines up (ku)
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CUD E[nB move cursor down n lines do (kd)
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CUF E[nC move cursor right n characters nd (kr)
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CUB E[nD move cursor left n characters bs (kl)
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HPA E[n` move cursor to character position n --
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HPR E[na move cursor right n characters --
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VPA E[nd move cursor to line n --
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VPR E[ne move cursor down n lines --
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CPL E[nF move cursor to start of line, --
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n lines up
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CNL E[nF move cursor to start of line, --
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n lines down
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CUP E[y;xH Move cursor to x, y cm
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HVP E[y;xf Move cursor to x, y --
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CBT E[nZ Move cursor back n tab stops bt
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IL E[nL Insert n blank lines al
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ICH E[n@ Insert n blank characters ic
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DL E[nM Delete n lines dl
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DCH E[nP Delete n characters dc
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ED E[nJ Erase part or all of display: cd
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n=0 from cursor to end of display,
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n=1 from begin of display to cursor,
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n=2 entire display.
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EL E[nK Erase part or all of line: ce
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n=0 from cursor to end of line,
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n=1 from begin of line to cursor,
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n=2 entire line.
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ECH E[nX Erase n characters --
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SU E[nS Scroll display n lines up (forward) sf
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SD E[nT Scroll display n lines down (reverse) sr
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SGR E[nm Set character attributes: --
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n= 0 normal attribute (all off)
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n= 1 bold (highlight)
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n= 4 underscore (if supported by HW)
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n= 5 blink (if supported by HW)
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n= 7 reverse
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n=3X set foreground color (see table)
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n=4X set background color (see table)
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X=0 black X=1 red
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X=2 green X=3 brown
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X=4 blue X=5 magenta
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X=6 cyan X=7 white
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-- E[=p;dB Set bell pitch (p) and duration (d), --
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picth is in units of 840 nS,
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duration is units of 0,1 S.
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-- E[=s:eC Set cursor start and end scanline, --
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start on line s, end on line e.
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-- E[=nA Set the border color to color n
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(see table) (if supported by HW)
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-- E[=cF set normal foreground color to n --
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(see table)
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-- E[=cG set normal background color to n --
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(see table)
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-- E[=cH set reverse foreground color to n --
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(see table)
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-- E[=cI set reverse background color to n --
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(see table)
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n= 0 black n= 8 grey
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n= 1 blue n= 9 light blue
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n= 2 green n=10 light green
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n= 3 cyan n=11 light cyan
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n= 4 red n=12 light red
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n= 5 magenta n=13 light magenta
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n= 6 brown n=14 yellow
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n= 7 white n=15 light white
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note: the first E in the sequences stands for ESC (0x1b)
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.Ed
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.Pp
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.Sh AUTHOR
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S<>ren Schmidt
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Email: (sos@login.dkuug.dk -or- sos@kmd-ac.dk)
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