/*****************************************************************
/                           ANALOG INPUT 8254 COUNTER 1 & 2 TIMING
*/
static void STX104_AI_Timing_8254_Set( int board, long time_interval_ns )
{
    long high_count;
    long low_count;
    unsigned int octet;

    STX104_Set_Bank( board, 0 );

    /* assumes 10MHz clock (i.e. no 1MHz jumper) */
    low_count  = 10L; /* 1 microsecond intervals */

    high_count = time_interval_ns / 1000;
    while ( high_count > 65536L )
    {
        high_count = high_count >> 1;
        low_count  = low_count << 1;
    }
    while ( high_count < 2L )
    {
        high_count = high_count << 1;
        low_count  = low_count >> 1;
    }
#ifdef STX104_DEBUG_MODE
     fprintf( stdout, "low_count=%ld, high_count=%ld\n",low_count,high_count);
     fprintf( stdout, "Actual Interval (uSec) = %ld\n",time_interval_ns);
#endif
    /* set counter/timer 2  */
    outportb( stx104_base_address[board] + STX104_CT_CONFIGURATION, 0xB4 );
    octet = ((unsigned int) high_count) & 0x00FF;
    outp( stx104_base_address[board] + STX104_CT2_DATA, octet );
#ifdef STX104_DEBUG_MODE
    fprintf( stdout, "CT2 LB=%u\n",octet );
#endif
    octet = ((unsigned int) high_count) >> 8;
    outp( stx104_base_address[board] + STX104_CT2_DATA, octet );
#ifdef STX104_DEBUG_MODE
    fprintf( stdout, "CT2 HB=%u\n",octet );
#endif
    /* set counter/timer 1  */
    outportb( stx104_base_address[board] + STX104_CT_CONFIGURATION, 0x74 );
    octet = ((unsigned int) low_count) & 0x00FF;
    outp( stx104_base_address[board] + STX104_CT1_DATA, octet );
#ifdef STX104_DEBUG_MODE
    fprintf( stdout, "CT1 LB=%u\n",octet );
#endif
    octet = ((unsigned int) low_count) >> 8;
    outp( stx104_base_address[board] + STX104_CT1_DATA, octet );
#ifdef STX104_DEBUG_MODE
    fprintf( stdout, "CT1 HB=%u\n",octet );
#endif
}