Hello All,
 I have been using this code for reading the Joystick under Dos But I don't
think it is valid under OS/2 at least EMX/GCC reports errors about
undefined symbols. Can anyone point out what is the problem with it as it
is?

typedef enum {ERROR = -1, FALSE, TRUE} LOGICAL;

#define BOOL(x) (!(!(x)))

struct joystick {
        LOGICAL switch_0;
        LOGICAL switch_1;
        LOGICAL switch_2;
        LOGICAL switch_3;

        int     pos_Ax;
        int     pos_Ay;
        int     pos_Bx;
        int     pos_By;
};


LOGICAL read_joystick(VOID)

{
        union REGS regs;

        regs.h.ah = 0x84;                       /* Read the switches    */
        regs.x.dx = 0;
        int86(0x15, ®s, ®s);
        if (regs.x.cflag)
                return ERROR;

        JoyStick.switch_0 = BOOL(regs.h.al & 0x10);
        JoyStick.switch_1 = BOOL(regs.h.al & 0x20);
        JoyStick.switch_2 = BOOL(regs.h.al & 0x40);
        JoyStick.switch_3 = BOOL(regs.h.al & 0x80);



        regs.h.ah = 0x84;                       /* Read positions       */
        regs.x.dx = 1;
        int86(0x15, ®s, ®s);
        if (regs.x.cflag)
                return ERROR;

        JoyStick.pos_Ax = regs.x.ax;
        JoyStick.pos_Ay = regs.x.bx;
        JoyStick.pos_Bx = regs.x.cx;
        JoyStick.pos_By = regs.x.dx;

        return 0;
}


--- Maximus/2 3.01