INT 62 u - FGDRIVER v1.10 - "FG_SOUNDS" - PLAY SOUNDS IN BACKGROUND
        AX = 0089h
        CX = number of times to cycle through sound list
        ES:BX -> sounds array (see below)
Note:   ignored if asynchronous sound (AX=0089h,AX=008Bh,AX=008Dh) is in
          progress
SeeAlso: AX=008Eh,AX=008Fh

Format of sounds array element:
Offset  Size    Description
 00h    WORD    frequency of sound in Hertz (0000h ends array)
 02h    WORD    duration of sound in clock ticks