INT 2F - RESPLAY - INITIALIZE
        AX = 8210h
        BL = sound device
            00h printer port LPT1
            01h printer port LPT2
            02h prototype board at I/O address 0300h
            03h printer port (alternative LPT1)
            04h internal speaker
        BH = sample rate in multiples of 250 Hz (14h to A0h)
        CL = direction
            00h playback
            01h sample
Return: AX = status
            1000h successful
            2000h parameter out of range
            other RESPLAY not installed
SeeAlso: AX=8200h

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