JIS plane 2, part 1

Note: Regarding the codepoint column from here onwards: the plane 2 codepoints for the SJIS codes after the end of the JIS X 0208 section are defined by the requisite appendix of JIS X 0213. Of course, this has only existed since 2000. Regarding older SJIS variants, which is to say, almost all other SJIS variants, row numbers are more commonly allocated sequentially as if the JIS X 0208 plane hadn't ended at row 94. Of course, the plane 2 system was used by EUC-JP, but this means that any extensions for EUC-JP before JIS X 0213 will collide with any extensions for SJIS from the same period.

JIS X 0212 rows are represented in EUC-JP only. The orders of the remaining rows aren't entirely identical: row 96 (02-08-*) gets put between rows 99 (02-05-*) and 100 (02-12-*), preserving the alternating odd/even rows, and meaning that the trail byte range can still be correctly identified from whether the row number is even.

Note: Compare 01-01-33 and 01-02-18. Might be mapped to U+007E in OSF or JIS X 0213 contexts which don't use that as the mapping for single-byte 0x7E (i.e. Shift_JIS, or JIS-Roman based EUC). Included amongst a set of spacing accents, and very clearly shown as a spacing accent in the code chart; however, I know of no context which maps it to U+02DC (˜).

Note: Mapped to U+FFE4 by OSF in its Microsoft-based variant only (i.e. mapping to the fullwidth codepoint when one exists, not only when needed for round-trip reasons), otherwise to U+00A6. Compare 01-01-81 and 01-01-82.