The Katakana code page (00290)

The Katakana code page (code page 00290) of Japan supports uppercase English and single-byte Katakana (phonetics) characters.

The lowercase English characters are located at code points different from other code pages and the hardware may not be able to display English uppercase, lowercase, and Katakana characters concurrently. Therefore, special considerations should be taken if the application is going to support this code page:

• Avoid using the lowercase alphabet for syntactic characters.
• Avoid using the SBCS lowercase alphabet with Japanese DBCS messages.