f5205e23c6
* Updated all ISO8859 and Vendor Unicode mappings from current Unicode.org information * John Cowan says that East Asia is obsolete * Delete obsolete file
200 lines
8.2 KiB
Plaintext
200 lines
8.2 KiB
Plaintext
This may be obsolete: (RMK 2021/08)
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The following is a listing of the differences between IBM's mappings
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of certain IBM code pages and Unicode, and the mappings for IBM code
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pages that came from various sources and were earlier made available
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at the Unicode ftp site.
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The first set of differences refers to tables found originally in the
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Microsoft directory at unicode.org. The DBCS tables were in the
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EastAsiaMaps directory. The findings are based on the content of the
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files as of April 26, 1996. Newer versions may result in fewer
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differences.
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Note that IBM has many conversion tables to Unicode available in a
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binary (machine readable) format on a CD-ROM included with the
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document SC09-2190-00 "CDRA Reference and Registry". These tables
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are also available in a readable format from IBM. For licensing
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information, please contact an IBM representative to the Unicode
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council. Currently (March/96) these are:
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Dr. V.S. (Uma) Umamaheswaran dorai@vnet.ibm.com
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John Gioia gioia@vnet.ibm.com
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Lisa Moore lisam@vnet.ibm.com
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Or, you may send a note to nltc@vnet.ibm.com.
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=======================================================================
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Code Pages 00437 (US etc.)
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00860 (Portugal)
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00861 (Iceland)
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00862 (Israel)
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00863 (Canadian French)
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00865 (Nordic)
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Microsoft IBM
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--------- -----
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0x1A U001A U001C
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0x1C U001C U007F
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0x7F U007F U001A
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0xE6 U00B5 (MICRO SIGN) U03BC (GREEK SMALL LETTER MU)
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The "rotation" of the control characters at 0x1A, 0x1C and
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0x7F is due to the frequent use of 0x1A as end-of-file by
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PC file systems and applications.
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=======================================================================
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Code Page 00852
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Microsoft IBM
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--------- -----
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0x1A U001A U001C
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0x1C U001C U007F
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0x7F U007F U001A
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0xAA U00AC (NOT SIGN) ---- (Unassigned)
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Note that Microsoft code page 852 has a "not sign" in position 0xAA
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whereas IBM 852 has 0xAA as unassigned. In IBM mappings, unassigned
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code points in a code page are generally mapped to SUB (U001A) in the
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binary tables. The readable tables do not contain entries for these
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points.
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=======================================================================
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Code Page 00850 (Latin 1)
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00855 (Cyrillic)
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00866 (Cyrillic - Russian)
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Microsoft IBM
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--------- -----
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0x1A U001A U001C
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0x1C U001C U007F
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0x7F U007F U001A
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=======================================================================
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Code Page 00857 (Turkish)
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Microsoft IBM
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--------- -----
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0x1A U001A U001C
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0x1C U001C U007F
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0x7F U007F U001A
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=======================================================================
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Code Page 00864 (Arabic)
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Microsoft IBM
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--------- -----
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0x1A U001A U001C
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0x1C U001C U007F
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0x7F U007F U001A
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0x9B U009B ---- (Unassigned)
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0x9C U009C ---- (Unassigned)
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0x9F U009F U200C (ZERO WIDTH NON-JOINER)
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0xA6 UF8BE ---- (Unassigned)
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0xA7 UF8BF ---- (Unassigned)
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0xD7 UFEC1 (ISOLATE ARABIC TAH) UFEC3 (MEDIAL ARABIC TAH)
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0xD8 UFEC5 (ISOLATE ARABIC DHAH) UFEC7 (MEDIAL ARABIC DHAH)
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0xF1 U0651 (ARABIC SHADDAH) UFE7C (ARABIC SPACING SHADDAH)
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=======================================================================
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Code Page 00869 (Greek)
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Microsoft IBM
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--------- -----
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0x1A U001A U001C
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0x1C U001C U007F
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0x7F U007F U001A
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0x80 U0080 ---- (Unassigned)
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0x81 U0081 ---- (Unassigned)
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0x82 U0082 ---- (Unassigned)
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0x83 U0083 ---- (Unassigned)
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0x84 U0084 ---- (Unassigned)
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0x85 U0085 ---- (Unassigned)
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0x87 U0087 ---- (Unassigned)
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0x88 U00B7 (MIDDLE DOT) U0387 (GREEK ANO TELEIA)
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0x93 U0093 ---- (Unassigned)
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0x94 U0094 ---- (Unassigned)
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0xEF U0384 (GREEK TONOS) U00B4 (ACUTE ACCENT)
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=======================================================================
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Code Page 00874 (Thai)
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Microsoft IBM
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--------- -----
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0x1A U001A U001C
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0x1C U001C U007F
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0x7F U007F U001A
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0x91 U2018 ---- (Unassigned)
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0x92 U2019 ---- (Unassigned)
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0x93 U201C ---- (Unassigned)
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0x94 U201D ---- (Unassigned)
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0x95 U2022 ---- (Unassigned)
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0x96 U2013 ---- (Unassigned)
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0x97 U2014 ---- (Unassigned)
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0xA0 U00A0 U0E48 (THAI CHARACTER MAI EK)
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0xDB ---- (Unassigned) U0E49 (THAI CHARACTER MAI THO)
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0xDC ---- (Unassigned) U0E4A (THAI CHARACTER MAI TRI)
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0xDD ---- (Unassigned) U0E4B (THAI CHARACTER MAI CHATTAW)
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0xDE ---- (Unassigned) U0E4C (THAI CHARACTER THANTHAKHAT)
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0xFC ---- (Unassigned) U00A2 (CENT SIGN)
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0xFD ---- (Unassigned) U00AC (NOT SIGN)
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0xFE ---- (Unassigned) U00A6 (BROKEN BAR)
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0xFF ---- (Unassigned) U00A0 (NO-BREAK SPACE)
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=======================================================================
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Regarding the mapping table between Unicode and Asian each country's
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National Standard, there are several differences between the tables in
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this directory and the table developed by IBM.
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The following list shows these differences.
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=======================================================================
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Japanese (JIS X0208)
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Unicode IBM
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------- -----
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(1) 0x213D U2015 U2014
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Note:
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(1) According to conversion table defined on JIS X0221 (ISO 10646-1
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JIS version), JIS:0x213D is mapped to U2014.
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=======================================================================
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S-Chinese (GB 2312)
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Unicode IBM
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------- -----
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(1) 0x212C U2225 U2016
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(2) 0x2327 UFF07 U00B4
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Note:
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(1) According to GB2312-80 standard, the character name of
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GB2312:0x212C is Double Vertical Line. And, U2016 is
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Double Vertical Line.
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(2) The character name of GB2312:0x2327 is Single Quotation
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Mark Right. Though no same character name exists in Unicode,
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glyph of U00B4 looks similar than UFF07.
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=======================================================================
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Please note that it is IBM policy to create a new code page identifier
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when there are any changes (other than additions) to a code page.
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This allows data or environment tagged with a specific identifier to
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have a precise meaning even after many years, and allows migration of
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environments (resources such as keyboard drivers, fonts etc..) to be
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managed in an orderly manner. This may result in a mismatch between
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an IBM identifier and the same identifier used by another vendor if
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that other vendor has modified the contents of the code page without
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changing the identifier.
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Current known cases of a code page not matching the IBM code page using
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the same identifier include:
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Microsoft 932 (Japanese)
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Microsoft 936 (Simplified Chinese)
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Microsoft 949 (Korean)
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Microsoft 852 (See above)
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