Format of DOS 5.0-6.0 DISPLAY.SYS 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 (see #01757 at INT 21/AX=6602h)
      N WORDs	software (prepared) code pages (FFFFh if not yet prepared)