Someone was asking how to turn key click on/off within a program.
(I believe it was Warren Long, who didn't want key click sounds to
 interrupt the other sounds generated by SpaceWars).

Well here is a simple program to do it.  It is pretty much self-
explanatory.

--------------------cut here----------------cut here--------------------
#include <stdio.h>
#include <osbind.h>

/* CLICK Modes */
#define C_TOGGLE    0
#define C_SET        1
#define C_RESET        2

/* System Variable 'Conterm' is a byte */
#define CONTERM        (*((char *)0x484))

/* Declare the meaning of the bits */
#define CLICK_BIT    1    /* Key click on/off */
#define REPEAT_BIT    2    /* Key repeat on/off */
#define BELL_BIT    4    /* Bell at <ctrl-G> on/off */
#define KBSHIFT_BIT    8    /* Return KBShift from Cconin in
                 * bits 24-31 on/off
                 */

main( argc, argv )
int argc;
char *argv[];
{
    int old_val, new_val;
    int mode;
    long save_ssp;

    /* Get the option.  If no option, toggle click setting */
    if( argc < 2 )
        mode = C_TOGGLE;
    else if ( strcmp( argv[1], "on" ) == 0 )
        mode = C_SET;
    else if ( strcmp( argv[1], "off" ) == 0 )
        mode = C_RESET;
    else {
        printf( "Unknown option '%s'\n", argv[1] );
        exit(1);
    }

    /* Enter Supervisor mode */
    save_ssp = Super( 0L );

    /* Get old value of CONTERM byte */
    old_val = CONTERM;

    switch( mode ) {
        case C_TOGGLE:
            new_val = old_val ^ CLICK_BIT;
            break;
        case C_SET:
            new_val = old_val | CLICK_BIT;
            break;
        case C_RESET:
            new_val = old_val & ~CLICK_BIT;
            break;
    }

    /* Set the new value */
    CONTERM = new_val;

    /* Exit out of supervisor mode */
    Super( save_ssp );
}

-------------cut here--------------------cut here-------------------------

David Rowley
Looking Glass Software
Waterloo, Ontario
...utzoo!watmath!looking!david