telecode - A character encoding system (codeset) for Traditional
Chinese
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 [Toc] [Back]
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 [Toc] [Back]
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 [Toc] [Back]
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 [Toc] [Back]
The operating system supports Telecode only through conversion
to another codeset.
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)
telecode(5)
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