idac: add ffb emulation

dist/idac/segatools.ini

@@ -75,6 +75,11 @@ dipsw3=0
 dipsw4=0
 dipsw5=0
 
+[ffb]
+; Enable force feedback (838-15069) board emulation. This is required for
+; both DirectInput and XInput steering wheel effects.
+enable=1
+
 ; -----------------------------------------------------------------------------
 ; LED settings
 ; -----------------------------------------------------------------------------
@@ -231,6 +236,21 @@ reverseAccelAxis=0
 reverseBrakeAxis=0
 
 ; Force feedback settings.
-; Strength of the force feedback spring effect in percent. Possible values
-; are 0-100.
-centerSpringStrength=30
+; Only works when FFB board emulation is enabled!
+;
+; It is recommended to change the strength inside the Game Test Mode!
+;
+; These settings are only used when using DirectInput for the wheel.
+; The values are in the range 0%-100%, where 0 disables the effect and
+; 100 is the maximum.
+
+; Constant force strength, used for centering spring effect.
+constantForceStrength=100
+; Damper strength, used for steering wheel damper effect.
+damperStrength=100
+
+; Rumble strength, used for road surface effects.
+; WARNING: THIS WILL CRASH ON FANATEC (maybe even more) WHEELS!
+rumbleStrength=100
+; Rumble duration factor from ms to µs, used to scale the duration of the rumble effect.
+rumbleDuration=1000