Int 16 Fn 13  - Dos/v - Double-byte Character Set Shift Control            [J]

   AH = 13h
   AL = function
       00h set shift status
       DX = shift status (see #0513), must preserve internal status
             bits
       01h get shift status

       Return: DX = current shift status (see #0513)

Note:  these functions are supplied by the Japanese Front-End Processor

See Also: AH=14h,INT 21/AX=6301h

Bitfields for DOS/V shift status:
Bit(s) Description (Table 0513)
 0 full-size rather than half-size
 2-1   character input mode
   00 alphanumeric, 01 Katakana, 10 Hiragana, 11 unused
 5-3   internal status
 6 Romaji enabled
 7 Katakana to Kanji conversion enabled
 15-8  internal status