Index Index for
Section 5
Index Alphabetical
listing for T
Bottom of page Bottom of
page		 

telecode(5)


NAME

  telecode - A character encoding system (codeset) for Traditional Chinese


DESCRIPTION

  The Telecode codeset (called Mitac Telex in early versions of the operating
  system) consists of 2 character planes. Each character plane has 8836
  character positions. In plane 1, standard characters occupy positions 0001
  to 8045; the remaining 791 positions are for user-defined characters. In
  plane 2, standard characters occupy positions 0001 to 8489; the remaining
  346 positions are for user-defined characters. Telecode uses 2-byte values
  to represent characters on both planes.

  Plane 1 Character Encoding

  To differentiate plane 1 code from plane 2 code, the most significant bit
  (MSB) is set on in both bytes of a plane 1 character code. The following
  formula calculates the value of a plane 1 character from its position on
  the plane:

  1st byte = M + 161
  2nd byte = N + 161 - M x 94

  In this formula, N is the position of the character and M = N / 94.

  For example, if a character is at position 2502 on plane 1, its encoding
  value is BBDB, which is calculated as follows:

       N = 2502, M = 2502/94 = 26
       1st byte = 26 + 161 = 187
       2nd byte = 2502 + 161 - 26 x 94 = 219

  Plane 2 Character Encoding

  To differentiate plane 2 code from plane 1 code, the MSB of the first byte
  is set on and that of the second byte is set off for each plane 2 character
  code. The following formula calculates the value of a plane 2 character
  from its position:

  1st byte = M + 161
  2nd byte = N + 33 - M x 94

  In this formula, N is the position of the character on the plane and
  M = N / 94.

  For example, if a character is at position 2502 on plane 2, its encoding
  value is BB5B, which is calculated as follows:

       N = 2502, M = 2502/94 = 26
       1st byte = 26 + 161 = 187
       2nd byte = 2502 + 33 - 26 x 94 = 91

  Codeset Conversion

  The following codeset converter pairs are available for converting
  Traditional Chinese characters between telecode and other encoding formats.
  Refer to iconv_intro(5) for an introduction to codeset conversion. For more
  information about the other codeset for which telecode is the input or
  output, see the reference page specified in the list item.

    ·  big5_telecode, telecode_big5

       Converting from and to the Big-5 codeset: big5(5).

       Note that Big-5 encoding is equivalent to the Microsoft code-page
       format used on PCs for Traditional Chinese. You can therefore use
       these converters to convert Traditional Chinese characters between PC
       code page format and Telecode encoding format. For more information on
       how the operating system supports PC code pages, see code_page(5).

    ·  dechanyu_telecode, telecode_dechanyu

       Converting from and to the DEC Hanyu codeset: dechanyu(5).

    ·  eucTW_telecode, telecode_eucTW

       Converting from and to Taiwanese Extended UNIX Code: eucTW(5).

  Font Support for Telecode

  The operating system supports Telecode only through conversion to another
  codeset.


SEE ALSO

  Commands: locale(1)

  Others: ascii(5), big5(5), Chinese(5), code_page(5), dechanyu(5),
  dechanzi(5), eucTW(5), GB18030(5), GBK(5), i18n_intro(5), i18n_printing(5),
  iconv_intro(5), l10n_intro(5), sbig5(5)

Index Index for
Section 5
Index Alphabetical
listing for T
Top of page Top of
page