INT 62 u - FGDRIVER v3.03 - "FG_VOICE" - START SOUND
        AX = 00AAh
        BX = channel on TI sound chip
                1-3 = channels 1-3, 4 = channel 4 with periodic noise,
                5 = channel 4 with white noise
        CX = frequency in Hz (18-32767 for channels 1-3; 0=512 Hz, 1=1024 Hz,
                2=2048 Hz for channels 4 and 5)
        DX = volume
        SI = duration in clock ticks (continuous if <= 0)
Program: FGDRIVER is the external video driver for the shareware
          Fastgraph/Light by Ted Gruber Software
Notes:  For FGDRIVER v1.10, this function was unused; "FG_VOICE" was AX=008Ah
        This function is only available on the PCjr and Tandy 1000 machines
SeeAlso: AX=006Ah,AX=009Dh,AX=00ABh

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