INT 13 - DISK - GET DISK TYPE (XT 1/10/86 or later,XT286,AT,PS)
        AH = 15h
        DL = drive number (bit 7 set for hard disk)
Return: CF clear if successful
            AH = type code
                00h no such drive
                01h floppy without change-line support
                02h floppy with change-line support
                03h hard disk
                    CX:DX = number of 512-byte sectors
        CF set on error
            AH = status (see AH=01h)
SeeAlso: AH=16h,AH=17h,AH=19h"SCSI"