speakup_dtlk.h

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/* speakup_dtlk.h - header file for speakups DoubleTalk driver. */

#define SYNTH_IO_EXTENT 0x02
#define SYNTH_CLEAR 0x18        /* stops speech */
    /* TTS Port Status Flags */
#define TTS_READABLE    0x80    /* mask for bit which is nonzero if a
                     byte can be read from the TTS port */
#define TTS_SPEAKING    0x40    /* mask for SYNC bit, which is nonzero
                     while DoubleTalk is producing
                     output with TTS, PCM or CVSD
                     synthesizers or tone generators
                     (that is, all but LPC) */
#define TTS_SPEAKING2   0x20    /* mask for SYNC2 bit,
                     which falls to zero up to 0.4 sec
                     before speech stops */
#define TTS_WRITABLE    0x10    /* mask for RDY bit, which when set to
                     1, indicates the TTS port is ready
                     to accept a byte of data.  The RDY
                     bit goes zero 2-3 usec after
                     writing, and goes 1 again 180-190
                     usec later. */
#define TTS_ALMOST_FULL 0x08    /* mask for AF bit: When set to 1,
                     indicates that less than 300 bytes
                     are available in the TTS input
                     buffer. AF is always 0 in the PCM,
                     TGN and CVSD modes. */
#define TTS_ALMOST_EMPTY 0x04   /* mask for AE bit: When set to 1,
                     indicates that less than 300 bytes
                     are remaining in DoubleTalk's input
                     (TTS or PCM) buffer. AE is always 1
                     in the TGN and CVSD modes. */

                /* data returned by Interrogate command */
struct synth_settings {
    u_short serial_number;  /* 0-7Fh:0-7Fh */
    u_char rom_version[24]; /* null terminated string */
    u_char mode;        /* 0=Character; 1=Phoneme; 2=Text */
    u_char punc_level;  /* nB; 0-7 */
    u_char formant_freq;    /* nF; 0-9 */
    u_char pitch;       /* nP; 0-99 */
    u_char speed;       /* nS; 0-9 */
    u_char volume;      /* nV; 0-9 */
    u_char tone;        /* nX; 0-2 */
    u_char expression;  /* nE; 0-9 */
    u_char ext_dict_loaded; /* 1=exception dictionary loaded */
    u_char ext_dict_status; /* 1=exception dictionary enabled */
    u_char free_ram;    /* # pages (truncated) remaining for
                 * text buffer */
    u_char articulation;    /* nA; 0-9 */
    u_char reverb;      /* nR; 0-9 */
    u_char eob;     /* 7Fh value indicating end of
                 * parameter block */
    u_char has_indexing;    /* nonzero if indexing is implemented */
};