G3 rows 83 to 84 For user defined characters, code points are allocated in order starting from the smallest number in both row numbers and column numbers. Of the IBM extended characters, those which correspond to the characters defined in JIS X 0208 and JIS X 0212, are mapped onto the latter, and the remaining characters are mapped in the numerical order of code point values starting from the 94th column of 84th row. Upon conversion of these characters, no characters are allocated in an area from 1st column of 83rd row to the 82nd column of 83rd row in the G3 block. This area is regarded as a reserved one. For conversion of IBM extended characters, refer to Attachment 2.
Roman character is ignored.
In conversion from Japanese EUC to SJIS, conversion from IBM extended characters to NEC-selected IBM extended characters is omitted. In case any code point is valid in the source system but does not have a corresponding code point in the destination system, it will be converted into a replacement character. Code points used for replacement characters depend on implementation. Detailed naming of code set For detailed identification among code sets, the following naming rule shall be used. The name given here is usable for the codeset field of locale name, the argument of iconv command, etc.