NAME
        SetJoyPortAttrsA -- change the attributes of a port.  (V40.27)
        SetJoyPortAttrs -- varargs stub for SetJoyPortAttrsA().  (V40.27)

   SYNOPSIS
        success = SetJoyPortAttrsA(portNumber, tagList);
        D0                         D0          A1

        bool setjoyportattrsa(ulong, struct tagitem *);

        Success = SetJoyPortAttrs(portNumber, firstTag, ...);

        bool setjoyportattrs(tag, ...);


   FUNCTION
        This function allows modification of several attributes held by
        readjoyport() about both it's operation and the type of controller
        currently plugged into the port.

        ReadJoyPort()'s default behavior is to attempt to automatically
        sense the type of controller plugged into any given port, when
        asked to read that port. This behavior is beneficial, to allow
        simple detection of the type of controller plugged into the port.
        Unfortunately, rare cases are possible where extremely fine
        mouse movements appear to be real joystick movements. Also, this
        ability to auto-sense the controller type causes most reads to
        take longer than if there were no auto-sensing.

        SetJoyPortAttrs() is intended to provide for both of these cases.
        It allows the programmer to notify readjoyport() to stop spending
        time attempting to sense which type of controller is in use -- and,
        optionally, to force readjoyport() into utilizing a certain
        controller type.

   INPUTS
        portNumber - the joyport in question (0-3).
        tagList - a pointer to an array of tags providing parameters
                  to SetJoyPortAttrs(); if NULL, the function
                  will return TRUE, but do nothing.

   TAGS
        SJA_Type (ULONG) - Sets the current controller type to the mouse,
                        joystick, or game controller. Supply one of
                        SJA_TYPE_GAMECTLR, SJA_TYPE_MOUSE, SJA_TYPE_JOYSTK,
                        or SJA_TYPE_AUTOSENSE. If SJA_TYPE_AUTOSENSE is used,
                        readjoyport() will attempt to determine the type of
                        controller plugged into the given port automatically.
                        If one of the other types is used, readjoyport() will
                        make no attempt to read the given controller as
                        anything other than the type specified. The default
                        type is SJA_AUTOSENSE.

                        Note -- if you set the type to anything other than
                        auto-sense, it's your responsibility to return it
                        to auto-sense mode before exiting.

        SJA_Reinitialize (VOID) - Return a given port to it's initial state,
                        forcing a port to deallocate any allocated resources;
                        return the implied type to SJA_TYPE_AUTOSENSE.

   RESULT
        success - TRUE if everything went according to plan, or FALSE upon
                  failure

   SEE ALSO
        readjoyport(), <libraries/lowlevel.h>