Int 2F Fn AD03  U - DOS 3.3+ Display.sys Internal - Get Code Page Informa  [V]

   AX = AD03h
   ES:DI -> buffer for code page information (see below)
   CX = size of buffer in bytes

Return: CF set if buffer too small
   CF clear if successful
       ES:DI buffer filled

See Also: AX=AD01h,AX=AD02h

Format of DOS 5.0-6.0 code page information:
Offset Size    Description
 00h   WORD    number of software code pages
 02h   WORD    ??? (0003h)
 04h   WORD    number of hardware code pages
 06h  N WORDs  hardware code page numbers
      N WORDs  software (prepared) code pages (FFFFh if not yet prepared)