INT 62 u - FGDRIVER v1.10 - "FG_VOICE" - START SOUND
        AX = 008Ah
        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)
Notes:  FGDRIVER is the external video driver for the shareware
          Fastgraph/Light by Ted Gruber Software
        only available on PCjr and Tandy 1000
SeeAlso: AX=008Bh,AX=008Ch