Format of JM Pro Tracker buffer-pointer structure:
Offset	Size	Description	)
 00h	WORD	length of ??? buffer (see AH=05h)
 02h	DWORD	-> ??? buffer (see AH=05h)
 06h	WORD	length of ??? buffer (see AH=06h)
 08h	DWORD	-> ??? buffer (see AH=06h)
 0Ch	WORD	length of ??? buffer (see AH=07h)
 0Eh	DWORD	-> ??? buffer (see AH=07h)
 12h	WORD	??? (see AH=07h)
 14h	WORD	??? (see AH=10h) (subfunction 01h)
 16h	WORD	??? (see AH=10h) (subfunction 01h)
 18h	WORD	??? (see AH=10h) (subfunction 00h)
 1Ah	WORD	??? (see AH=10h) (subfunction 01h)