source: buchla-68k/include/scwheel.h

/*
   =============================================================================
        scwheel.h -- MIDAS-VII scroll wheel and trackball constants
        Version 14 -- 1989-07-20 -- D.N. Lynx Crowe
   =============================================================================
*/

#pragma once

#define NSWFIFO         100             /* scroll wheel FIFO size */

#define SWBACK          10              /* scroll wheel FIFO look back count */
#define SWRMIN          8               /* scroll wheel rate threshold */
#define SWTHR           4               /* scroll wheel movement threshold */
#define SWTIME          10              /* scroll wheel timer scan rate */
#define SWWAIT          2               /* scroll wheel wait count */

#define NTKFIFO         100             /* trackball FIFO size */

#define TKBACK          8               /* trackball FIFO look back count */
#define TKRMIN          6               /* trackball rate threshold */
#define TKTHR           3               /* trackball movement threshold */
#define TKTIME          10              /* trackball timer scan rate */
#define TKWAIT          2               /* trackball wait count */

#define TKXDVR          4               /* text cursor X divisor */
#define TKYDVR          6               /* text cursor Y divisor */

#define TKCDVR          6               /* text cursor movement threshold */

#define MSTOVAL         125             /* mouse movement timer value */
#define MUTIME          1000            /* mouse reset timer value */