Emulations

• DEC VT100 and selected features of VT200/300/400/500
• DEC Special Graphics
• ANSI control sequences, which are not supported by VT100 (color attribute etc.), are also supported.
• The xterm extension sequences like as the mouse and the 256 color are supported.
• You can enable or disable the use of bold style font for characters with the bold attribute. You can also set the color to display them.
• Characters with the blink attribute don't actually blink. Instead, you can set the color with which to display them.
• Characters with double width/height and VT52 mode are not supported.
• Tektronix TEK4010

Color

Available color modes

• 16 color mode (PC style)
• 16 color mode (aixterm style)
• 256 color mode (xterm style)

Sequence which changes availability depends on color setting

8 color mode

When either 16 or 256 color mode is enabled, colors 1-7 are slightly darker.

When 16 and 256 color modes are disable, 8 color mode is used and colors 1-7 are bright(primary) colors.

• Fore color 0-7 = SGR 30-37
• Back color 0-7 = SGR 40-47

16 color mode (PC style)

Blink attribute is Tera Term extension.

• Fore color 0-7 = SGR 30-37
• Fore color 8-15 = Bold + SGR 30-37
• Back color 0-7 = SGR 40-47
• Back color 8-15 = Blink + SGR 40-47

16 color mode (aixterm style)

When the 16-color mode (aixterm style) is disalbe, SGR100 is "text and background colors set to default".

• Fore color 0-7,8-15 = SGR 30-37,90-97
• Back color 0-7,8-15 = SGR 40-47,100-107

256 color mode(xterm style)

• Fore color 0-255 = Set color number with SGR 38
• Back color 0-255 = Set color number with SGR 48

16 color mode (PC style) detail

In Tera Term To extend fore and background 16 color simultaneously, bold attribute is used to extend the fore color and blink attribute is used to extend the background color.

If bold attribute is used to extend the background color, for example, it is not possible to specify a fore color is 15 and background color is 1.

Application outputs according to TERMINFO (e.g. ncurses applications), TERMINFO entry setab as follows:

  setab=\E[%?%p1%{8}%<%t4%p1%d%e%p1%{16}%<%t5;4%p1%{8}%-%d%e48;5;%p1%d%;m,

About changing color

16 default colors can be changed in TERATERM.INI.

Color themes can also be changed.

Change default color

• [Tera Term] section in TERATERM.INI
• ANSIColor key
• 8 bright colors from the beginning (primary color, bright version)
• Next 8 colors are slightly darker than first 8 colors (black is not replaced)

16/256 color mode

• 0 black
• 1-7 Slightly darker color
• 8 gray
• 9-15 Bright color, primary color

8 color mode

• 0-7 Bright color, primary color

color table

      TERATERM.INI            16/256 color              8 color
 0    "Black"                 "Black"                   "Black"
 1    "Bright Red"            "Red"                     "Bright Red"
 2    "Bright Green"          "Green"                   "Bright Green"
 3    "Bright Yellow"         "Yellow"                  "Bright Yellow"
 4    "Bright Blue"           "Blue"                    "Bright Blue"
 5    "Bright Magenta"        "Magenta"                 "Bright Magenta"
 6    "Bright Cyan"           "Cyan"                    "Bright Cyan"
 7    "Bright White"          "White"                   "Bright White"
 8    "Bright Black (Gray)"   "Bright Black (Gray)"
 9    "Red"                   "Bright Red"
10    "Green"                 "Bright Green"
11    "Yellow"                "Bright Yellow"
12    "Blue"                  "Bright Blue"
13    "Magenta"               "Bright Magenta"
14    "Cyan"                  "Bright Cyan"
15    "White"                 "Bright White"

Reverse color

Reverse color is displayed in the following cases:

• SGR 7
• When DECSCNM set
• When the mouse is selected

When reverse attribute is enabled, text is drawn with reverse attribute fore and back colors.

When reverse attribute is disabled, the fore and back colors are replace to make the display reverse color. (Some terminal emulators use (255-R,255-G,255-B) as (R,G,B) color invert color.)

This is for following reasons:

• Tera Term's main emulation target is DEC VT series
• Same as VT525 operation, which can handle color in the VT series.

text foreground and background colors

• Text has attributes
• Normal attribute has no special attributes
• There may be multiple attributes (such as Reverse+Bold)
• Attributes related to color are Reverse, Blink, Bold, Underline, and URL. When each of these attributes is enabled, attribute's colors are used.
• The fore and back colors of the text are determined by the attributes above table
• Attribute with goh in the gUseNormalBGColorh column uses gNormal backh when gAlways use Normal text's BGh is checked.

| Attribute           | Fore Color     | Back Color     | UseNormalBGColor | remark         |
|---------------------|----------------|----------------|------------------|----------------|
| Fore color          | Fore color     | -              |                  | 8/16/256 color |
| Back color          | -              | Back color     |                  | 8/16/256 color |
| Blink attribute     | Blink fore     | Blink back     | o                | SGR5           |
| Bold attribute      | Bold fore      | Bold back      | o                | SGR1           |
| Underline attribute | Underline fore | Underline back | o                | SGR4           |
| URL attribute       | URL fore       | URL back       | o                |                |
| Reverse attribute   | Reverse fore   | Reverse back   |                  | SGR7           |
| Normal attribute    | Normal fore    | Normal back    |                  | SGR0           |

• When the Reverse attribute is enabled and the text is displayed in reverse
• Only Reverse attribute texts is seted colors of the Reverse attribute
• For other attribute texts, Fore and Back are swapped.
• When the Reverse attribute is disabled and the text is displayed in reverse
• Fore and Back are swapped.
• When UseTextColor=onand
  Fore is ANSI0(black) or ANSI7(white) or ANSI15(gray), and Fore and Back are same,
  • When attribute has no Reverse, Normal attributefs Fore and Back are used.
  • When attribute has Reverse, Reverse attributefs Fore and Back are used.