ANSI/VT100 Terminal Control escape sequences (operations on control terminals)

Your computer terminals and terminal emulators support color and cursor control through a system of escape sequences. One such standard is commonly referred to as ANSI colour. Several terminal specifications are
Based on the ANSI color standard, including vt100.

The following is a partial listing of the VT100 control set.

<ESC>Represents the ASCII "escape" character, 0x1b. Bracketed tags represent modifiable decimal parameters; eg.{ROW}Wocould be replaced by a row number.

Device status

The following codes are used for reporting terminal/display settings, and vary depending on the implementation:

Query Device Code<ESC>[c

• RequestsReport Device CodeResponse from the device.

Report Device Code<ESC>[{code}0c

• Generated by the device in responseQuery Device CodeRequest.

Query Device Status<ESC>[5n

• RequestsReport Device StatusResponse from the device.

Report Device OK<ESC>[0n

• Generated by the device in response toQuery Device StatusRequest; indicates that device is functioning correctly.

Report Device Failure<ESC>[3n

• Generated by the device in response toQuery Device StatusRequest; indicates that device is functioning improperly.

Query Cursor Position<ESC>[6n

• RequestsReport Cursor PositionResponse from the device.

Report Cursor Position<ESC>[{ROW};{COLUMN}R

• Generated by the device in response toQuery Cursor PositionRequest; Reports current cursor position.

Terminal setup

ThehAndlCodes
Are used for setting Terminal/display mode, and vary depending on the implementation. Line wrap is one of the few setup codes that tend to be used consistently:

Reset Device<ESC>c

• Reset all terminal settings to default.

Enable Line Wrap<ESC>[7h

• Text wraps to next line if longer than the length of the display area.

Disable Line Wrap<ESC>[7l

• Disables line wrapping.

Fonts

Some terminals support multiple fonts: normal/bold, Swiss/italic, etc. There are a variety of special codes for certain terminals; The following are fairly standard:

Font Set G0<ESC>(

• Set default font.

Font Set G1<ESC>)

• Set alternate font.

Cursor control

Cursor Home <ESC>[{ROW};{COLUMN}H

• Sets the cursor position where subsequent text will begin. If no row/column parameters are provided (ie.<ESC>[H), The cursor will move toHomePosition, at the upper left of the screen.

Cursor Up<ESC>[{COUNT}A

• Moves the cursor upCountRows; the default count is 1.

Cursor Down<ESC>[{COUNT}B

• Moves the cursor downCountRows; the default count is 1.

Cursor Forward<ESC>[{COUNT}C

• Moves the cursorForwardByCountColumns; the default count is 1.

Cursor Backward<ESC>[{COUNT}D

• Moves the cursorBackwardByCountColumns; the default count is 1.

Force Cursor Position<ESC>[{ROW};{COLUMN}f

• IdenticalCursor Home.

Save Cursor<ESC>[s

• Save current cursor position.

Unsave Cursor<ESC>[u

• Restores cursor position afterSave Cursor.

Save Cursor & Attrs<ESC>7

• Save current cursor position.

Restore Cursor & Attrs<ESC>8

• Restores cursor position afterSave Cursor.

Scrolling

Scroll Screen<ESC>[r

• Enable scrolling for entire display.

Scroll Screen<ESC>[{start};{end}r

• Enable scrolling from row{start}To row{end}.

Scroll Down<ESC>D

• Scroll display down one line.

Scroll Up<ESC>M

• Scroll display up one line.

Tab Control

Set Tab <ESC>H

• Sets a tab at the current position.

Clear Tab <ESC>[g

• Clears tab at the current position.

Clear All Tabs <ESC>[3g

• Clears all tabs.

Erasing text

Erase End of Line<ESC>[K

• Erases from the current cursor position to the end of the current line.

Erase Start of Line<ESC>[1K

• Erases from the current cursor position to the start of the current line.

Erase Line<ESC>[2K

• Erases the entire current line.

Erase Down<ESC>[J

• Erases the screen from the current line down to the bottom of the screen.

Erase Up<ESC>[1J

• Erases the screen from the current line up to the top of the screen.

Erase Screen<ESC>[2J

• Erases the screen with the background color and moves the cursorHome.

Printing

Some terminals support local printing:

Print Screen<ESC>[i

• Print the current screen.

Print Line<ESC>[1i

• Print the current line.

Stop Print Log<ESC>[4i

• Disable log.

Start Print Log<ESC>[5i

• Start log; all encoded ed text is echoed to a printer.

Define key

Set Key Definition<ESC>[{key};"{string}"p

• AssociatesStringOf text to a keyboard key.{key}Indicates the key by its ASCII value in decimal.

Set display attributes

Set Attribute Mode<ESC>[{attr1};...;{attrn}m

• Sets Multiple display attribute settings. The following lists standard attributes:

  0Reset all attributes1Bright2Dim4Underscore5Blink7Reverse8HiddenForeground Colours30Black31Red32Green33Yellow34Blue35Magenta36Cyan37WhiteBackground Colours40Black41Red42Green43Yellow44Blue45Magenta46Cyan47White

  Address: http://www.termsys.demon.co.uk/vtansi.htm