The current CharToByte converters for these EBCDIC based codepages incorrectly
map the Unicode characters, U+000E and U+000F back to \x0e and \x0f which
represent orphaned SI/SO bytes within those encodings (Cp930, Cp933, Cp935,
Cp937, Cp939). This issue was highlighted within bugID 4296969: Incorrect
behaviour of several character converters which examines a broad sweep
of round-trip issues.