chusan: ledport changed to COM5, fixes VFD

board/aime-dll.h

@@ -18,6 +18,7 @@ struct aime_dll {
 
 struct aime_dll_config {
     wchar_t path[MAX_PATH];
+    bool path64;
 };
 
 extern struct aime_dll aime_dll;

board/config.c

@@ -9,18 +9,59 @@
 #include "board/config.h"
 #include "board/sg-reader.h"
 
+#include "util/dprintf.h"
+
+// Check windows
+#if _WIN32 || _WIN64
+    #if _WIN64
+        #define ENV64BIT
+    #else
+        #define ENV32BIT
+    #endif
+#endif
+
+// Check GCC
+#if __GNUC__
+    #if __x86_64__ || __ppc64__
+        #define ENV64BIT
+    #else
+        #define ENV32BIT
+    #endif
+#endif
+
 static void aime_dll_config_load(struct aime_dll_config *cfg, const wchar_t *filename)
 {
     assert(cfg != NULL);
     assert(filename != NULL);
 
-    GetPrivateProfileStringW(
+    // Workaround for x64/x86 external IO dlls
+    // path32 for 32bit, path64 for 64bit
+    // for else.. is that possible? idk
+
+    if (cfg->path64) {
+        #if defined(ENV32BIT)
+            // Always empty, due to amdaemon being 64 bit in 32 bit mode
+            memset(cfg->path, 0, sizeof(cfg->path));
+        #elif defined(ENV64BIT)
+            GetPrivateProfileStringW(
+                    L"aimeio",
+                    L"path",
+                    L"",
+                    cfg->path,
+                    _countof(cfg->path),
+                    filename);
+        #else
+            #error "Unknown environment"
+        #endif
+    } else {
+        GetPrivateProfileStringW(
             L"aimeio",
             L"path",
             L"",
             cfg->path,
             _countof(cfg->path),
             filename);
+    }
 }
 
 void aime_config_load(struct aime_config *cfg, const wchar_t *filename)

chuniio/chuniio.c

@@ -38,7 +38,7 @@ void chuni_io_jvs_read_coin_counter(uint16_t *out)
         return;
     }
 
-    if (GetAsyncKeyState(chuni_io_cfg.vk_coin)) {
+    if (GetAsyncKeyState(chuni_io_cfg.vk_coin) & 0x8000) {
         if (!chuni_io_coin) {
             chuni_io_coin = true;
             chuni_io_coins++;
@@ -62,15 +62,6 @@ void chuni_io_jvs_poll(uint8_t *opbtn, uint8_t *beams)
         *opbtn |= CHUNI_IO_OPBTN_SERVICE;
     }
 
-    if (GetAsyncKeyState(chuni_io_cfg.vk_coin) & 0x8000) {
-        if (!chuni_io_coin) {
-            chuni_io_coin = true;
-            *opbtn |= CHUNI_IO_OPBTN_COIN;
-        }
-    } else {
-        chuni_io_coin = false;
-    }
-
     if (chuni_io_cfg.vk_ir_emu) {
         // Use emulated AIR
         if (GetAsyncKeyState(chuni_io_cfg.vk_ir_emu)) {

chuniio/config.c

@@ -57,7 +57,7 @@ void chuni_io_config_load(
                 filename);
     }
 
-    GetPrivateProfileStringW(L"slider", L"ledport", L"COM2", port_input, 6, filename);
+    GetPrivateProfileStringW(L"slider", L"ledport", L"COM5", port_input, 6, filename);
     wcsncpy(cfg->led_com, L"\\\\.\\", 4);
     wcsncat_s(cfg->led_com, 11, port_input, 6);
 }

chusanhook/config.c

@@ -141,6 +141,9 @@ void chusan_hook_config_load(
 
     memset(cfg, 0, sizeof(*cfg));
 
+    // Force load the 64bit Aime DLL instead of the 32bit one
+    cfg->aime.dll.path64 = true;
+
     platform_config_load(&cfg->platform, filename);
     aime_config_load(&cfg->aime, filename);
     dvd_config_load(&cfg->dvd, filename);

chusanhook/dllmain.c

@@ -100,11 +100,7 @@ static DWORD CALLBACK chusan_pre_startup(void)
     }
 
     bool *dipsw = &chusan_hook_cfg.platform.dipsw.dipsw[0];
-
-    if (dipsw[1] != dipsw[2]) {
-        dprintf("DipSw: DipSw2 and 3 must be set to the same value!\n");
-        goto fail;
-    }
+    bool *is_sp = dipsw + 2;
 
     for (int i = 0; i < 3; i++) {
         switch (i) {
@@ -117,13 +113,21 @@ static DWORD CALLBACK chusan_pre_startup(void)
             break;
 
         case 2:
-            dprintf("DipSw: Aime Reader: %s\n", dipsw[2] ? "CVT" : "SP");
+            dprintf("DipSw: Cab Type: %s\n", is_sp ? "SP" : "CVT");
 
             break;
         }
     }
 
-    unsigned int first_port = dipsw[1] ? 2 : 20;
+    unsigned int first_port = is_sp ? 20 : 2;
+
+    if (is_sp) {
+        hr = vfd_hook_init(2);
+
+        if (FAILED(hr)) {
+            goto fail;
+        }
+    }
 
     hr = led15093_hook_init(&chusan_hook_cfg.led15093, first_port, 2, 2, 1);
 
@@ -131,7 +135,7 @@ static DWORD CALLBACK chusan_pre_startup(void)
         goto fail;
     }
 
-    hr = sg_reader_hook_init(&chusan_hook_cfg.aime, 4, dipsw[2] ? 2 : 3, chusan_hook_mod);
+    hr = sg_reader_hook_init(&chusan_hook_cfg.aime, 4, is_sp ? 3: 2, chusan_hook_mod);
 
     if (FAILED(hr)) {
         goto fail;

chusanhook/io4.c

@@ -73,6 +73,7 @@ static HRESULT chusan_io4_poll(void* ctx, struct io4_state* state)
     beams = 0;
 
     chuni_dll.jvs_poll(&opbtn, &beams);
+    chuni_dll.jvs_read_coin_counter(&coins);
 
     if (chuni_dll.api_version >= 0x0101) {
         // Use correct mapping
@@ -90,9 +91,7 @@ static HRESULT chusan_io4_poll(void* ctx, struct io4_state* state)
         state->buttons[0] |= IO4_BUTTON_SERVICE;
     }
 
-    if (opbtn & CHUNI_IO_OPBTN_COIN) {
-        coins++;
-    }
+    // Update the coin counter with the value from jvs_read_coin_counter
     state->chutes[0] = coins << 8;
 
     for (i = 0; i < 6; i++) {

dist/chuni/segatools.ini

@@ -82,3 +82,7 @@ coin=0x33
 ;cell31=0x53
 ;cell30=0x53
 ; ... etc ...
+
+; Enable slider LED serial output. This follows OpeNITHM Serial LED Protocol.
+; eg. COM5
+;ledport=

dist/chusan/segatools.ini

@@ -16,9 +16,9 @@ aimePath=DEVICE\aime.txt
 ;highbaud=1
 
 [aimeio]
-; x64 aimeio dll path.
-; Uncomment this if you have custom aime implementation.
-;path64=
+; Uncomment this if you have custom (x64) aime implementation.
+; Leave empty if you want to use Segatools built-in keyboard input.
+;path=
 
 [dns]
 ; Insert the hostname or IP address of the server you wish to use here.
@@ -35,7 +35,7 @@ enable=1
 ; The /24 LAN subnet that the emulated keychip will tell the game to expect.
 ; If you disable netenv then you must set this to your LAN's IP subnet, and
 ; that subnet must start with 192.168.
-subnet=192.168.100.0
+subnet=192.168.139.0
 
 [gpio]
 ; ALLS DIP switches.
@@ -49,10 +49,10 @@ freeplay=0
 ; LAN Install: If multiple machines are present on the same LAN then set 
 ; this to 1 on exactly one machine and set this to 0 on all others.
 dipsw1=1
-; Monitor type: 0 = 120FPS (SP), 1 = 60FPS (CVT)
+; Monitor type: 0 = 120FPS, 1 = 60FPS
 dipsw2=1
-; Aime reader hardware type: 0 = SP, 1 = CVT. Both dipsw2 and dipsw3 must be
-; the same value.
+; Cab type: 0 = SP, 1 = CVT. SP will enable VFD and eMoney. This setting will switch
+; the LED 837-15093-06 COM port and the AiMe reder hardware generation as well.
 dipsw3=1
 
 [gfx]

dist/idac/segatools.ini

@@ -29,7 +29,7 @@ enable=1
 ; If you disable netenv then you must set this to your LAN's IP subnet, and
 ; that subnet must start with 192.168. Set it to your LAN's subnet if you 
 ; want to play head-to-head using netenv=1.
-subnet=192.168.100.0
+subnet=192.168.158.0
 
 ; Override the keychip's region code. Most games seem to pay attention to the
 ; DS EEPROM region code and not the keychip region code, and this seems to be
@@ -174,3 +174,8 @@ gear6=18
 ; (Needed when using DirectInput for the Dualshock 4 for example)
 reverseAccelAxis=0
 reverseBrakeAxis=0
+
+; Force feedback settings.
+; Strength of the force feedback spring effect in percent. Possible values
+; are 0-100.
+centerSpringStrength=30

dist/idz/segatools.ini

@@ -173,3 +173,8 @@ gear6=18
 ; (Needed when using DirectInput for the Dualshock 4 for example)
 reverseAccelAxis=0
 reverseBrakeAxis=0
+
+; Force feedback settings.
+; Strength of the force feedback spring effect in percent. Possible values
+; are 0-100.
+centerSpringStrength=30

dist/swdc/segatools.ini

@@ -133,3 +133,8 @@ wheelGreen=10
 ; (Needed when using DirectInput for the Dualshock 4 for example)
 reverseAccelAxis=0
 reverseBrakeAxis=0
+
+; Force feedback settings.
+; Strength of the force feedback spring effect in percent. Possible values
+; are 0-100.
+centerSpringStrength=30

idacio/config.c

@@ -79,6 +79,14 @@ void idac_di_config_load(struct idac_di_config *cfg, const wchar_t *filename)
         cfg->gear[i] = GetPrivateProfileIntW(L"dinput", key, i + 1, filename);
     }
 
+    // FFB configuration
+
+    cfg->center_spring_strength = GetPrivateProfileIntW(
+                            L"dinput",
+                            L"centerSpringStrength",
+                            30,
+                            filename);
+
 }
 
 void idac_xi_config_load(struct idac_xi_config *cfg, const wchar_t *filename)

idacio/config.h

@@ -23,6 +23,9 @@ struct idac_di_config {
     uint8_t gear[6];
     bool reverse_brake_axis;
     bool reverse_accel_axis;
+
+    // FFB configuration
+    uint16_t center_spring_strength;
 };
 
 struct idac_xi_config {

idacio/di-dev.c

@@ -44,7 +44,8 @@ HRESULT idac_di_dev_start(IDirectInputDevice8W *dev, HWND wnd)
     return hr;
 }
 
-void idac_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out)
+void idac_di_dev_start_fx(
+    IDirectInputDevice8W *dev, IDirectInputEffect **out, uint16_t strength)
 {
     /* Set up force-feedback on devices that support it. This is just a stub
        for the time being, since we don't yet know how the serial port force
@@ -67,7 +68,7 @@ void idac_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out)
     DWORD axis;
     LONG direction;
     DIEFFECT fx;
-    DICONSTANTFORCE cf;
+    DICONDITION cond;
     HRESULT hr;
 
     assert(dev != NULL);
@@ -77,11 +78,17 @@ void idac_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out)
 
     dprintf("DirectInput: Starting force feedback (may take a sec)\n");
 
+    // Auto-centering effect
     axis = DIJOFS_X;
     direction = 0;
 
-    memset(&cf, 0, sizeof(cf));
-    cf.lMagnitude = 0;
+    memset(&cond, 0, sizeof(cond));
+    cond.lOffset = 0;
+    cond.lPositiveCoefficient = strength;
+    cond.lNegativeCoefficient = strength;
+    cond.dwPositiveSaturation = strength; // For FG920?
+    cond.dwNegativeSaturation = strength; // For FG920?
+    cond.lDeadBand = 0;
 
     memset(&fx, 0, sizeof(fx));
     fx.dwSize = sizeof(fx);
@@ -93,20 +100,19 @@ void idac_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out)
     fx.cAxes = 1;
     fx.rgdwAxes = &axis;
     fx.rglDirection = &direction;
-    fx.cbTypeSpecificParams = sizeof(cf);
-    fx.lpvTypeSpecificParams = &cf;
+    fx.cbTypeSpecificParams = sizeof(cond);
+    fx.lpvTypeSpecificParams = &cond;
 
     hr = IDirectInputDevice8_CreateEffect(
             dev,
-            &GUID_ConstantForce,
+            &GUID_Spring,
             &fx,
             &obj,
             NULL);
 
     if (FAILED(hr)) {
-        dprintf("DirectInput: DirectInput force feedback unavailable: %08x\n",
+        dprintf("DirectInput: Centering spring force feedback unavailable: %08x\n",
                 (int) hr);
-
         return;
     }
 
@@ -114,15 +120,15 @@ void idac_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out)
 
     if (FAILED(hr)) {
         IDirectInputEffect_Release(obj);
-        dprintf("DirectInput: DirectInput force feedback start failed: %08x\n",
+        dprintf("DirectInput: Centering spring force feedback start failed: %08x\n",
                 (int) hr);
-
         return;
     }
 
     *out = obj;
 
-    dprintf("DirectInput: Force feedback initialized and set to zero\n");
+    dprintf("DirectInput: Centering spring effects initialized with strength %d%%\n", 
+            strength / 100);
 }
 
 HRESULT idac_di_dev_poll(

idacio/di-dev.h

@@ -11,7 +11,7 @@ union idac_di_state {
 };
 
 HRESULT idac_di_dev_start(IDirectInputDevice8W *dev, HWND wnd);
-void idac_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out);
+void idac_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out, uint16_t strength);
 HRESULT idac_di_dev_poll(
         IDirectInputDevice8W *dev,
         HWND wnd,

idacio/di.c

@@ -75,6 +75,7 @@ static uint8_t idac_di_gear[6];
 static bool idac_di_use_pedals;
 static bool idac_di_reverse_brake_axis;
 static bool idac_di_reverse_accel_axis;
+static uint16_t idac_di_center_spring_strength;
 
 HRESULT idac_di_init(
         const struct idac_di_config *cfg,
@@ -173,7 +174,9 @@ HRESULT idac_di_init(
         return hr;
     }
 
-    idac_di_dev_start_fx(idac_di_dev, &idac_di_fx);
+    // Convert the strength from 0-100 to 0-10000 for DirectInput
+    idac_di_dev_start_fx(idac_di_dev, &idac_di_fx, 
+                         idac_di_center_spring_strength * 100);
 
     if (cfg->pedals_name[0] != L'\0') {
         hr = IDirectInput8_EnumDevices(
@@ -364,6 +367,16 @@ static HRESULT idac_di_config_apply(const struct idac_di_config *cfg)
         idac_di_gear[i] = cfg->gear[i];
     }
 
+    // FFB configuration
+
+    if (cfg->center_spring_strength < 0 || cfg->center_spring_strength > 100) {
+        dprintf("Wheel: Invalid center spring strength: %i\n", cfg->center_spring_strength);
+
+        return E_INVALIDARG;
+    }
+
+    idac_di_center_spring_strength = cfg->center_spring_strength;
+
     return S_OK;
 }
 

idzio/config.c

@@ -76,7 +76,14 @@ void idz_di_config_load(struct idz_di_config *cfg, const wchar_t *filename)
         swprintf_s(key, _countof(key), L"gear%i", i + 1);
         cfg->gear[i] = GetPrivateProfileIntW(L"dinput", key, i + 1, filename);
     }
+    
+    // FFB configuration
 
+    cfg->center_spring_strength = GetPrivateProfileIntW(
+                            L"dinput",
+                            L"centerSpringStrength",
+                            30,
+                            filename);
 }
 
 void idz_xi_config_load(struct idz_xi_config *cfg, const wchar_t *filename)

idzio/config.h

@@ -21,6 +21,9 @@ struct idz_di_config {
     uint8_t gear[6];
     bool reverse_brake_axis;
     bool reverse_accel_axis;
+
+    // FFB configuration
+    uint16_t center_spring_strength;
 };
 
 struct idz_xi_config {

idzio/di-dev.c

@@ -44,7 +44,8 @@ HRESULT idz_di_dev_start(IDirectInputDevice8W *dev, HWND wnd)
     return hr;
 }
 
-void idz_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out)
+void idz_di_dev_start_fx(
+    IDirectInputDevice8W *dev, IDirectInputEffect **out, uint16_t strength)
 {
     /* Set up force-feedback on devices that support it. This is just a stub
        for the time being, since we don't yet know how the serial port force
@@ -67,7 +68,7 @@ void idz_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out)
     DWORD axis;
     LONG direction;
     DIEFFECT fx;
-    DICONSTANTFORCE cf;
+    DICONDITION cond;
     HRESULT hr;
 
     assert(dev != NULL);
@@ -77,11 +78,17 @@ void idz_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out)
 
     dprintf("DirectInput: Starting force feedback (may take a sec)\n");
 
+    // Auto-centering effect
     axis = DIJOFS_X;
     direction = 0;
 
-    memset(&cf, 0, sizeof(cf));
-    cf.lMagnitude = 0;
+    memset(&cond, 0, sizeof(cond));
+    cond.lOffset = 0;
+    cond.lPositiveCoefficient = strength;
+    cond.lNegativeCoefficient = strength;
+    cond.dwPositiveSaturation = strength; // For FG920?
+    cond.dwNegativeSaturation = strength; // For FG920?
+    cond.lDeadBand = 0;
 
     memset(&fx, 0, sizeof(fx));
     fx.dwSize = sizeof(fx);
@@ -93,20 +100,19 @@ void idz_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out)
     fx.cAxes = 1;
     fx.rgdwAxes = &axis;
     fx.rglDirection = &direction;
-    fx.cbTypeSpecificParams = sizeof(cf);
-    fx.lpvTypeSpecificParams = &cf;
+    fx.cbTypeSpecificParams = sizeof(cond);
+    fx.lpvTypeSpecificParams = &cond;
 
     hr = IDirectInputDevice8_CreateEffect(
             dev,
-            &GUID_ConstantForce,
+            &GUID_Spring,
             &fx,
             &obj,
             NULL);
 
     if (FAILED(hr)) {
-        dprintf("DirectInput: DirectInput force feedback unavailable: %08x\n",
+        dprintf("DirectInput: Centering spring force feedback unavailable: %08x\n",
                 (int) hr);
-
         return;
     }
 
@@ -114,15 +120,15 @@ void idz_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out)
 
     if (FAILED(hr)) {
         IDirectInputEffect_Release(obj);
-        dprintf("DirectInput: DirectInput force feedback start failed: %08x\n",
+        dprintf("DirectInput: Centering spring force feedback start failed: %08x\n",
                 (int) hr);
-
         return;
     }
 
     *out = obj;
 
-    dprintf("DirectInput: Force feedback initialized and set to zero\n");
+    dprintf("DirectInput: Centering spring effects initialized with strength %d%%\n", 
+            strength / 100);
 }
 
 HRESULT idz_di_dev_poll(

idzio/di-dev.h

@@ -11,7 +11,7 @@ union idz_di_state {
 };
 
 HRESULT idz_di_dev_start(IDirectInputDevice8W *dev, HWND wnd);
-void idz_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out);
+void idz_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out, uint16_t strength);
 HRESULT idz_di_dev_poll(
         IDirectInputDevice8W *dev,
         HWND wnd,

idzio/di.c

@@ -73,6 +73,7 @@ static uint8_t idz_di_gear[6];
 static bool idz_di_use_pedals;
 static bool idz_di_reverse_brake_axis;
 static bool idz_di_reverse_accel_axis;
+static uint16_t idz_di_center_spring_strength;
 
 HRESULT idz_di_init(
         const struct idz_di_config *cfg,
@@ -171,7 +172,9 @@ HRESULT idz_di_init(
         return hr;
     }
 
-    idz_di_dev_start_fx(idz_di_dev, &idz_di_fx);
+    // Convert the strength from 0-100 to 0-10000 for DirectInput
+    idz_di_dev_start_fx(idz_di_dev, &idz_di_fx, 
+                        idz_di_center_spring_strength * 100);
 
     if (cfg->pedals_name[0] != L'\0') {
         hr = IDirectInput8_EnumDevices(
@@ -346,6 +349,16 @@ static HRESULT idz_di_config_apply(const struct idz_di_config *cfg)
         idz_di_gear[i] = cfg->gear[i];
     }
 
+    // FFB configuration
+
+    if (cfg->center_spring_strength < 0 || cfg->center_spring_strength > 100) {
+        dprintf("Wheel: Invalid center spring strength: %i\n", cfg->center_spring_strength);
+
+        return E_INVALIDARG;
+    }
+
+    idz_di_center_spring_strength = cfg->center_spring_strength;
+
     return S_OK;
 }
 

swdcio/config.c

@@ -67,6 +67,14 @@ void swdc_di_config_load(struct swdc_di_config *cfg, const wchar_t *filename)
                             L"reverseAccelAxis",
                             0,
                             filename);
+
+    // FFB configuration
+
+    cfg->center_spring_strength = GetPrivateProfileIntW(
+                            L"dinput",
+                            L"centerSpringStrength",
+                            30,
+                            filename);
 }
 
 void swdc_xi_config_load(struct swdc_xi_config *cfg, const wchar_t *filename)

swdcio/config.h

@@ -19,6 +19,9 @@ struct swdc_di_config {
     uint8_t wheel_yellow;
     bool reverse_brake_axis;
     bool reverse_accel_axis;
+
+    // FFB configuration
+    uint16_t center_spring_strength;
 };
 
 struct swdc_xi_config {

swdcio/di-dev.c

@@ -44,7 +44,8 @@ HRESULT swdc_di_dev_start(IDirectInputDevice8W *dev, HWND wnd)
     return hr;
 }
 
-void swdc_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out)
+void swdc_di_dev_start_fx(
+    IDirectInputDevice8W *dev, IDirectInputEffect **out, uint16_t strength)
 {
     /* Set up force-feedback on devices that support it. This is just a stub
        for the time being, since we don't yet know how the serial port force
@@ -67,7 +68,7 @@ void swdc_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out)
     DWORD axis;
     LONG direction;
     DIEFFECT fx;
-    DICONSTANTFORCE cf;
+    DICONDITION cond;
     HRESULT hr;
 
     assert(dev != NULL);
@@ -77,11 +78,17 @@ void swdc_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out)
 
     dprintf("DirectInput: Starting force feedback (may take a sec)\n");
 
+    // Auto-centering effect
     axis = DIJOFS_X;
     direction = 0;
 
-    memset(&cf, 0, sizeof(cf));
-    cf.lMagnitude = 0;
+    memset(&cond, 0, sizeof(cond));
+    cond.lOffset = 0;
+    cond.lPositiveCoefficient = strength;
+    cond.lNegativeCoefficient = strength;
+    cond.dwPositiveSaturation = strength; // For FG920?
+    cond.dwNegativeSaturation = strength; // For FG920?
+    cond.lDeadBand = 0;
 
     memset(&fx, 0, sizeof(fx));
     fx.dwSize = sizeof(fx);
@@ -93,20 +100,19 @@ void swdc_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out)
     fx.cAxes = 1;
     fx.rgdwAxes = &axis;
     fx.rglDirection = &direction;
-    fx.cbTypeSpecificParams = sizeof(cf);
-    fx.lpvTypeSpecificParams = &cf;
+    fx.cbTypeSpecificParams = sizeof(cond);
+    fx.lpvTypeSpecificParams = &cond;
 
     hr = IDirectInputDevice8_CreateEffect(
             dev,
-            &GUID_ConstantForce,
+            &GUID_Spring,
             &fx,
             &obj,
             NULL);
 
     if (FAILED(hr)) {
-        dprintf("DirectInput: DirectInput force feedback unavailable: %08x\n",
+        dprintf("DirectInput: Centering spring force feedback unavailable: %08x\n",
                 (int) hr);
-
         return;
     }
 
@@ -114,15 +120,15 @@ void swdc_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out)
 
     if (FAILED(hr)) {
         IDirectInputEffect_Release(obj);
-        dprintf("DirectInput: DirectInput force feedback start failed: %08x\n",
+        dprintf("DirectInput: Centering spring force feedback start failed: %08x\n",
                 (int) hr);
-
         return;
     }
 
     *out = obj;
 
-    dprintf("DirectInput: Force feedback initialized and set to zero\n");
+    dprintf("DirectInput: Centering spring effects initialized with strength %d%%\n", 
+            strength / 100);
 }
 
 HRESULT swdc_di_dev_poll(

swdcio/di-dev.h

@@ -11,7 +11,7 @@ union swdc_di_state {
 };
 
 HRESULT swdc_di_dev_start(IDirectInputDevice8W *dev, HWND wnd);
-void swdc_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out);
+void swdc_di_dev_start_fx(IDirectInputDevice8W *dev, IDirectInputEffect **out, uint16_t strength);
 HRESULT swdc_di_dev_poll(
         IDirectInputDevice8W *dev,
         HWND wnd,

swdcio/di.c

@@ -70,6 +70,7 @@ static uint8_t swdc_di_wheel_yellow;
 static bool swdc_di_use_pedals;
 static bool swdc_di_reverse_brake_axis;
 static bool swdc_di_reverse_accel_axis;
+static uint16_t swdc_di_center_spring_strength;
 
 HRESULT swdc_di_init(
         const struct swdc_di_config *cfg,
@@ -168,7 +169,9 @@ HRESULT swdc_di_init(
         return hr;
     }
 
-    swdc_di_dev_start_fx(swdc_di_dev, &swdc_di_fx);
+    // Convert the strength from 0-100 to 0-10000 for DirectInput
+    swdc_di_dev_start_fx(swdc_di_dev, &swdc_di_fx,
+                         swdc_di_center_spring_strength * 100);
 
     if (cfg->pedals_name[0] != L'\0') {
         hr = IDirectInput8_EnumDevices(
@@ -320,6 +323,16 @@ static HRESULT swdc_di_config_apply(const struct swdc_di_config *cfg)
     swdc_di_reverse_brake_axis = cfg->reverse_brake_axis;
     swdc_di_reverse_accel_axis = cfg->reverse_accel_axis;
 
+    // FFB configuration
+
+    if (cfg->center_spring_strength < 0 || cfg->center_spring_strength > 100) {
+        dprintf("Wheel: Invalid center spring strength: %i\n", cfg->center_spring_strength);
+
+        return E_INVALIDARG;
+    }
+
+    swdc_di_center_spring_strength = cfg->center_spring_strength;
+
     return S_OK;
 }