Int 21 Fn 6300  - DOS 2.25 Only - Get Lead Byte Table Address              [D]

   AX = 6300h

Return: CF clear if successful
       DS:SI -> lead byte table (see below)
   CF set on error
       AX = error code (01h) (see AH=59h)

Notes: does not preserve any registers other than SS:SP
   the US version of MS-DOS 3.30 treats this as an unused function,
     setting AL=00h and returning immediately

See Also: AX=6301h,AH=07h,AH=08h,AH=0Bh

Format of lead byte table entry:
Offset Size    Description
 00h  2 BYTEs  low/high ends of a range of leading byte of double-byte chars
 02h  2 BYTEs  low/high ends of a range of leading byte of double-byte chars
   ...
  N   2 BYTEs  00h,00h end flag