VT100 encoding

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VT100
Language(s)English, various others
ClassificationExtended ASCII, Mac OS script
ExtendsASCII

The VT100 code page is a character encoding used to represent text on the Classic Mac OS for compatibility with the VT100 terminal. It encodes 256 characters, the first 128 of which are identical to ASCII, with the remaining characters including mathematical symbols, diacritics, and additional punctuation marks. It is suitable for English and several other Western languages. It is similar to Mac OS Roman, but includes all characters in ISO 8859-1 except for the currency sign (which was superseded by the euro sign), the no-break space, and the soft hyphen. It also includes all characters in DEC Special Graphics (code page 1090), except for the new line and no-break space controls. The VT100 encoding is only used on the VT100 font on the Classic Mac OS, and is not an official Mac OS character encoding.[1]

Codepage layout[edit]

The following table shows how characters are encoded in the VT100 character set. Each character is shown with its Unicode equivalent.

VT100
0 1 2 3 4 5 6 7 8 9 A B C D E F
0x NUL SOH STX ETX EOT ENQ ACK BEL  BS   HT   LF   VT   FF   CR   SO   SI  
1x DLE DC1 DC2 DC3 DC4 NAK SYN ETB CAN  EM  SUB ESC  FS   GS   RS   US 
2x  SP  ! " # $ % & ' ( ) * + , - . /
3x 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
4x @ A B C D E F G H I J K L M N O
5x P Q R S T U V W X Y Z [ \ ] ^ _
6x ` a b c d e f g h i j k l m n o
7x p q r s t u v w x y z { | } ~ DEL
8x Ä Å Ç É Ñ Ö Ü á à â ä ã å ç é è
9x ê ë í ì î ï ñ ó ò ô ö õ ú ù û ü
Ax Ý ° ¢ £ § ¸ ß ® © ´ ¨ Æ Ø
Bx × ± ¥ µ ¹ ² ³ π ¦ ª º æ ø
Cx ¿ ¡ ¬ ½ ƒ ¼ ¾ « » [b] À Ã Õ Œ œ
Dx ÷ ÿ Ÿ [c] Ð ð Þ þ
Ex ý · [d] Â Ê Á Ë È Í Î Ï Ì Ó Ô
Fx Ò Ú Û Ù

  Letter  Number  Punctuation  Symbol  Other  Undefined

  1. ^ a b c d e The codes 0xA2, 0xA3, 0xA9, 0xB1, and 0xB5 coincidentally have the same character assignment as ISO 8859-1 (and thus Unicode).
  2. ^ The character 0xCA is the replacement character, which is displayed as a reversed question mark in this encoding.
  3. ^ Before Mac OS 8.5, the character 0xDB mapped to currency sign (¤), Unicode character U+00A4.
  4. ^ The character 0xE4 is the horizontal scan line-5, which is unified with U+2500 in Unicode.

References[edit]

  1. ^ "Older Character Sets". whitefiles.org. Retrieved October 3, 2019.