INT 2F - CD-ROM - ABSOLUTE DISK READ                                            
	AX = 1508h
	ES:BX -> buffer
	CX = drive number (0=A:)
	SI:DI = starting sector number
	DX = number of sectors to read
Return: CF set on error
	    AL = error code (0Fh invalid drive,15h not ready)
	CF clear if successful
Note:	returns error 15h (not ready) under Windows95 if the starting sector
	  number is less than 10h
SeeAlso: AX=1509h