osf1 man page for telecode

telecode(5)							File Formats Manual						       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 charac-
       ters. 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  for-
       mats.   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 infor-
	      mation 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),	GBK(5),  i18n_intro(5),  i18n_printing(5),
       iconv_intro(5), l10n_intro(5), sbig5(5)

																       telecode(5)