Japanese, Chinese and Korean (double-byte)

These code pages mix single-byte characters with double-byte ones (kanji, hanzi and hangul). Pick one under Characters on the connect page, where they are listed under Double-byte, or have IT set it for everyone with CodePage or on each connection. Sessions imported from PCOMM and Reflection bring their code page. They work in the desktop app and in WND Terminal in a browser.

On a mainframe

Mainframe sessions work the way PCOMM, Host On-Demand, Reflection and x3270 do. The terminal type stays the usual one, such as IBM-3278-2-E. The reply to the host’s query says the terminal handles double-byte text (IBM’s DBCS-Asia reply, with the code page’s numbers), so CICS, IMS, TSO and ISPF send Japanese, Chinese or Korean.

• The screen. Double-byte characters are drawn once, two positions wide. Text between SO and SI is read, with each shift character shown as a blank in a position of its own. DBCS fields and double-byte text the host marks with Set Attribute are read too. The cursor never stops on the second half of a character.
• DBCS fields take only double-byte characters. Letters and digits typed there go in as their full-width forms.
• Mixed fields, where the host allows SO/SI creation (CICS BMS SOSI=YES, ISPF’s mixed fields), take both kinds. WND Terminal puts in the SO and SI as you type, overtype, insert, delete or erase, and never splits a character.
• Other fields take only single-byte characters. When a character is refused, the status line says why.
• What goes to the host has SO and SI paired and whole characters only.

One difference from x3270 is on purpose. x3270 fills an empty DBCS field with DBCS spaces and sends them. WND Terminal leaves the field empty, so the host gets only what was typed, as for any other field.

On IBM i

5250 sessions handle DBCS-only, either, open and graphic fields as IBM i defines them, with characters drawn two positions wide. See IBM i (5250).

Typing, copying and the rest

People type with the computer’s own input method (IME), and pasting works too. Copying, macros, the automation API, Modern view, masking, session recordings and Explain this screen all read the characters, without the SO and SI positions.

How it’s checked

We compare screens and keystrokes with x3270 for 930, 939, 935 and 937, and run a test mainframe in every code page above, checking the query reply and every byte the host gets back.

IT settings