INT 2F - Kingswood TSR Windows - SOUND BEEPER AX = 3901h BL = 0Ah DX = sound divisor, or 0 for silence. (divide 1843200 by required frequency to get value for DX) CL = sound length in 18.2 Hz clock ticks Return: AX = error code (0000h if successful) SI,DI,DS,ES preserved SeeAlso: AH=39h/BL=00h