idac, idz, swdc: Fixed DInput brake/accel, added cubic steering

dist/swdc/segatools.ini

@@ -40,6 +40,18 @@ path=
 ; Leave empty if you want to use Segatools built-in gamepad/wheel input.
 path=
 
+; -----------------------------------------------------------------------------
+; Input settings
+; -----------------------------------------------------------------------------
+
+; Keyboard bindings are specified as hexadecimal (prefixed with 0x) or decimal
+; (not prefixed with 0x) virtual-key codes, a list of which can be found here:
+;
+; https://docs.microsoft.com/en-us/windows/win32/inputdev/virtual-key-codes
+;
+; This is, admittedly, not the most user-friendly configuration method in the
+; world. An improved solution will be provided later.
+
 [io4]
 ; Test button virtual-key code. Default is the 1 key.
 test=0x31
@@ -49,22 +61,25 @@ service=0x32
 coin=0x33
 ; Input API selection for IO4 input emulator.
 ; Set "xinput" to use a gamepad and "dinput" to use a steering wheel.
+
 mode=xinput
 ; Use the left thumbstick for steering instead of both on XInput Controllers.
-; Not recommended as it will not give you the precision needed for this game
+; Not recommended as it will not give you the precision needed for this game.
 singleStickSteering=1
+; Use linear steering instead of the default non-linear cubing steering.
+linearSteering=0
 ; Adjust scaling for steering wheel input.
 ;
 ; This setting scales the steering wheel input so that the maximum positive
 ; and minimum negative steering inputs reported in the operator menu's input
 ; test screen do not exceed the value below. The maximum possible value is 128,
-; and the value that matches the input range of a real cabinet is 97.
+; and the value that matches the input range of a real cabinet is 128.
 ;
 ; NOTE: This is not the same thing as DirectInput steering wheel movement
 ; range! Segatools cannot control the maximum angle of your physical steering
 ; wheel controller, this setting is vendor-specific and can only be adjusted
 ; in the Control Panel.
-restrict=97
+restrict=128
 
 [dinput]
 ; Name of the DirectInput wheel to use (or any text that occurs in its name)