chore: Update changelog for release

Add a "BTMD" FOURCC + version in the beginning of the mapper data file.
Is backwards compatible with the current data format.

CHANGELOG.md

@@ -2,6 +2,23 @@
 Note for CI/CD: Ensure the version formatting in the sections is kept identical to the versions
 given in tags. The pipeline will pick this up and cuts out the relevant section for release notes.
 
+## 5.48
+### Features
+* feat(config): Add invert analog input option. Remark: The old configuration file format is
+  upgraded but downgrading is not possible anymore. The new saves are using a new filename
+  and it doesn't delete the old files, see `C:\Users\<YOUR_USERNAME>\AppData\Roaming\DJHACKERS`
+
+### Fixes
+
+## 5.47
+### Features
+N/A
+
+### Fixes
+* fix(ddr/p3ioemu): Handle unknown 2B command to fix DDR X IO errors
+* fix(ddr/p3io): Crash on all supported DDR games due to incorrect p3io message size validation
+* fix(geninput): Sony DualShock 4 not working
+
 ## 5.46
 ### Features
 * feat(ddrio): Wrapper/shim library to drive another ddrio in a dedicated IO thread. Improves performance for highly IO

README.md

@@ -1,6 +1,6 @@
 # Bemanitools 5
 
-Version: `5.46`
+Version: `5.48`
 
 [Changelog](CHANGELOG.md)
 

src/main/config/analogs.c

@@ -49,11 +49,13 @@ static INT_PTR analog_ui_handle_init(HWND hwnd, struct analog_def *def);
 static void analog_ui_handle_init_label(HWND hwnd);
 static void analog_ui_handle_init_dev(HWND hwnd);
 static void analog_ui_handle_init_sensitivity(HWND hwnd);
+static void analog_ui_handle_init_invert(HWND hwnd);
 static bool analog_ui_match_device(struct hid_stub *hid);
 static void analog_ui_populate_controls(HWND hwnd);
 static INT_PTR analog_ui_handle_device_change(HWND hwnd);
 static INT_PTR analog_ui_handle_control_change(HWND hwnd);
 static INT_PTR analog_ui_handle_sensitivity_change(HWND hwnd);
+static INT_PTR analog_ui_handle_invert_change(HWND hwnd);
 static INT_PTR analog_ui_handle_tick(HWND hwnd);
 static INT_PTR analog_ui_handle_fini(HWND hwnd);
 
@@ -213,6 +215,15 @@ analog_ui_dlg_proc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
                             return FALSE;
                     }
 
+                case BN_CLICKED:
+                    switch (LOWORD(wparam)) {
+                        case IDC_ANALOG_INVERT:
+                            return analog_ui_handle_invert_change(hwnd);
+
+                        default:
+                            return FALSE;
+                    }
+
                 default:
                     return FALSE;
             }
@@ -248,6 +259,7 @@ static INT_PTR analog_ui_handle_init(HWND hwnd, struct analog_def *def)
     analog_ui_handle_init_label(hwnd);
     analog_ui_handle_init_dev(hwnd);
     analog_ui_handle_init_sensitivity(hwnd);
+    analog_ui_handle_init_invert(hwnd);
 
     return TRUE;
 }
@@ -343,6 +355,17 @@ static void analog_ui_handle_init_sensitivity(HWND hwnd)
     EnableWindow(slider, !mapper_is_analog_absolute(ui->def->tag));
 }
 
+static void analog_ui_handle_init_invert(HWND hwnd)
+{
+    struct analog_ui *ui;
+
+    ui = (struct analog_ui *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
+
+    if (mapper_get_analog_invert(ui->def->tag)) {
+        SendMessage(GetDlgItem(hwnd, IDC_ANALOG_INVERT), BM_SETCHECK, BST_CHECKED, 0);
+    }
+}
+
 static bool analog_ui_match_device(struct hid_stub *hid)
 {
     struct hid_control *controls;
@@ -519,6 +542,21 @@ static INT_PTR analog_ui_handle_sensitivity_change(HWND hwnd)
     return TRUE;
 }
 
+static INT_PTR analog_ui_handle_invert_change(HWND hwnd)
+{
+    struct analog_ui *ui;
+    HWND btn;
+    bool invert;
+
+    ui = (struct analog_ui *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
+    btn = GetDlgItem(hwnd, IDC_ANALOG_INVERT);
+    invert = SendMessage(btn, BM_GETCHECK, 0, 0) == BST_CHECKED;
+
+    mapper_set_analog_invert(ui->def->tag, invert);
+
+    return TRUE;
+}
+
 static INT_PTR analog_ui_handle_tick(HWND hwnd)
 {
     struct analog_ui *ui;

src/main/config/config.rc

@@ -22,18 +22,19 @@ IDR_USAGES         USAGES         "config/usages.txt"
 // Dialog resources
 //
 LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
-IDD_ANALOG DIALOG 0, 0, 220, 100
+IDD_ANALOG DIALOG 0, 0, 220, 115
 STYLE DS_3DLOOK | DS_CENTER | DS_SHELLFONT | WS_VISIBLE | WS_CHILDWINDOW
 EXSTYLE WS_EX_CONTROLPARENT
 FONT 8, "Ms Shell Dlg"
 {
-    GROUPBOX        "", IDC_GROUP, 5, 5, 210, 90
+    GROUPBOX        "", IDC_GROUP, 5, 5, 210, 105
     CONTROL         "", IDC_SENSITIVITY, TRACKBAR_CLASS, WS_TABSTOP | TBS_AUTOTICKS, 10, 75, 200, 15
     LTEXT           "Device", IDC_STATIC, 15, 15, 24, 8, SS_LEFT
     COMBOBOX        IDC_DEVICE, 15, 25, 135, 30, WS_GROUP | WS_TABSTOP | CBS_DROPDOWNLIST | CBS_HASSTRINGS
     COMBOBOX        IDC_CONTROL, 15, 50, 135, 30, WS_TABSTOP | CBS_DROPDOWNLIST | CBS_HASSTRINGS
     LTEXT           "Sensitivity", IDC_STATIC, 15, 65, 32, 8, SS_LEFT
     LTEXT           "Control", IDC_STATIC, 15, 40, 23, 8, SS_LEFT
+    AUTOCHECKBOX    "Invert Axis", IDC_ANALOG_INVERT, 15, 95, 141, 8
     CONTROL         "", IDC_POSITION, "spinner", 0x50020000, 160, 15, 50, 50, 0x02002000
 }
 
@@ -126,7 +127,7 @@ FONT 8, "Ms Shell Dlg"
 
 
 LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
-IDD_TAB_ANALOGS DIALOG 0, 0, 220, 215
+IDD_TAB_ANALOGS DIALOG 0, 0, 220, 230
 STYLE DS_3DLOOK | DS_CENTER | DS_MODALFRAME | DS_SHELLFONT | WS_CAPTION | WS_VISIBLE | WS_POPUP | WS_SYSMENU
 CAPTION "Analogs"
 FONT 8, "Ms Shell Dlg"

src/main/config/resource.h

@@ -30,6 +30,7 @@
 #define IDC_DEVICE 1005
 #define IDC_BINDING_EDIT 1006
 #define IDC_CONTROL 1006
+#define IDC_ANALOG_INVERT 1007
 #define IDC_BINDING_CLEAR 1007
 #define IDC_BINDING_MIN 1008
 #define IDC_PAGE_TEXT 1008

src/main/geninput/dev-list.c

@@ -20,7 +20,7 @@ void dev_list_init(struct dev_list *devs, const GUID *class_guid)
     devs->infolist = SetupDiGetClassDevs(
         devs->class_guid, NULL, NULL, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
 
-    if (devs->infolist == NULL) {
+    if (devs->infolist == INVALID_HANDLE_VALUE) {
         log_fatal(
             "SetupDiGetClassDevs failed: %08x", (unsigned int) GetLastError());
     }

src/main/geninput/geninput.def

@@ -35,6 +35,7 @@ EXPORTS
     mapper_get_action_map
     mapper_get_analog_map
     mapper_get_analog_sensitivity
+    mapper_get_analog_invert
     mapper_get_npages
     mapper_get_nanalogs
     mapper_get_nlights
@@ -44,6 +45,7 @@ EXPORTS
     mapper_set_action_map
     mapper_set_analog_map
     mapper_set_analog_sensitivity
+    mapper_set_analog_invert
     mapper_set_light_map
     mapper_set_nanalogs
     mapper_set_nlights

src/main/geninput/hid-meta-out.c

@@ -48,7 +48,12 @@ arrays_fail:
     hid_meta_out_fini_caps(meta);
 
 caps_fail:
-    return false;
+    /**
+     * Still allow the device to be used as input.
+     * Useful for devices like the Sony DUALSHOCK 4, where it indicates it can receive outputs
+     * but it errors out when trying to initialize an output report.
+     */
+    return true;
 }
 
 static bool
@@ -99,9 +104,11 @@ hid_meta_out_init_caps(struct hid_meta_out *meta, PHIDP_PREPARSED_DATA ppd)
 
 caps_val_fail:
     free(meta->caps_val);
+    meta->caps_val = NULL;
 
 caps_btn_fail:
     free(meta->caps_btn);
+    meta->caps_btn = NULL;
 
 caps_tlc_fail:
     return false;
@@ -114,7 +121,6 @@ static bool hid_meta_out_init_arrays(struct hid_meta_out *meta)
     bool *report_presence;
     unsigned int nreports;
     unsigned int i;
-    uint8_t *bytes;
     size_t nbytes;
     size_t count;
 
@@ -174,7 +180,6 @@ static bool hid_meta_out_init_arrays(struct hid_meta_out *meta)
     for (i = 0; i < 0x100; i++) {
         if (report_presence[i]) {
             nbytes = meta->caps_tlc.OutputReportByteLength;
-            bytes = xmalloc(meta->caps_tlc.OutputReportByteLength);
 
             if (!hid_report_out_init(
                     &meta->reports[meta->nreports],
@@ -198,14 +203,22 @@ static bool hid_meta_out_init_arrays(struct hid_meta_out *meta)
     return true;
 
 r_init_fail:
-    free(bytes);
-
     for (i = meta->nreports; i > 0; i--) {
         hid_report_out_fini(&meta->reports[i - 1]);
     }
 
     free(report_presence);
+
+    // Clear out all output/light data
+    meta->nreports = 0;
     free(meta->reports);
+    meta->reports = NULL;
+    
+    meta->nlights = 0;
+    meta->nbuttons = 0;
+    // Failed out before allocating memory
+    meta->lights = NULL;
+    meta->priv_lights = NULL;
 
     return false;
 }
@@ -433,5 +446,8 @@ static void hid_meta_out_fini_arrays(struct hid_meta_out *meta)
 static void hid_meta_out_fini_caps(struct hid_meta_out *meta)
 {
     free(meta->caps_btn);
+    meta->caps_btn = NULL;
+
     free(meta->caps_val);
+    meta->caps_val = NULL;
 }

src/main/geninput/input-config.h

@@ -15,6 +15,7 @@ bool mapper_get_action_map(
     uint8_t action, uint8_t page, struct mapped_action *ma);
 bool mapper_get_analog_map(uint8_t analog, struct mapped_analog *ma);
 int32_t mapper_get_analog_sensitivity(uint8_t analog);
+bool mapper_get_analog_invert(uint8_t analog);
 uint8_t mapper_get_nanalogs(void);
 uint8_t mapper_get_nlights(void);
 uint8_t mapper_get_npages(void);
@@ -25,6 +26,7 @@ void mapper_set_action_map(
     uint8_t action, uint8_t page, uint8_t bit, const struct mapped_action *ma);
 bool mapper_set_analog_map(uint8_t analog, const struct mapped_analog *ma);
 bool mapper_set_analog_sensitivity(uint8_t analog, int32_t sensitivity);
+bool mapper_set_analog_invert(uint8_t analog, bool invert);
 void mapper_set_nanalogs(uint8_t nanalogs);
 void mapper_set_nlights(uint8_t nlights);
 void mapper_set_light_map(const struct mapped_light *ml, uint8_t game_light);

src/main/geninput/input.c

@@ -25,10 +25,20 @@ static volatile long input_init_count;
 static FILE *mapper_config_open(const char *game_type, const char *mode)
 {
     char path[MAX_PATH];
+    FILE *f;
 
-    str_format(path, sizeof(path), "%s_v5_00a07.bin", game_type);
+    str_format(path, sizeof(path), "%s.bin", game_type);
+    f = fopen_appdata("DJHACKERS", path, mode);
 
-    return fopen_appdata("DJHACKERS", path, mode);
+    // Try to load the old save file only if we're loading
+    if (f == NULL) {
+        if (strchr(mode, 'r') != NULL) {
+            str_format(path, sizeof(path), "%s_v5_00a07.bin", game_type);
+            f = fopen_appdata("DJHACKERS", path, mode);
+        }
+    }
+    
+    return f;
 }
 
 void input_set_loggers(
@@ -144,6 +154,11 @@ int32_t mapper_get_analog_sensitivity(uint8_t analog)
     return mapper_impl_get_analog_sensitivity(mapper_inst, analog);
 }
 
+bool mapper_get_analog_invert(uint8_t analog)
+{
+    return mapper_impl_get_analog_invert(mapper_inst, analog);
+}
+
 uint8_t mapper_get_nanalogs(void)
 {
     return mapper_impl_get_nanalogs(mapper_inst);
@@ -190,6 +205,11 @@ bool mapper_set_analog_sensitivity(uint8_t analog, int32_t sensitivity)
     return mapper_impl_set_analog_sensitivity(mapper_inst, analog, sensitivity);
 }
 
+bool mapper_set_analog_invert(uint8_t analog, bool invert)
+{
+    return mapper_impl_set_analog_invert(mapper_inst, analog, invert);
+}
+
 void mapper_set_light_map(const struct mapped_light *ml, uint8_t game_light)
 {
     mapper_impl_set_light_map(mapper_inst, ml, game_light);

src/main/geninput/mapper-s11n.c

@@ -6,9 +6,25 @@
 #include "util/fs.h"
 #include "util/mem.h"
 
-static bool mapper_impl_config_load_actions(struct mapper *m, FILE *f);
-static bool mapper_impl_config_load_analogs(struct mapper *m, FILE *f);
-static bool mapper_impl_config_load_lights(struct mapper *m, FILE *f);
+enum mapper_config_version {
+    MAPPER_VERSION_BEFORE_VERSIONING = 0,
+    MAPPER_VERSION_INVERT_AXIS,
+
+    // --- Add new versions above this line --- //
+    MAPPER_VERSION_PLUS_ONE,
+    MAPPER_VERSION_LATEST = MAPPER_VERSION_PLUS_ONE - 1,
+};
+
+#define FOURCC(a, b, c, d) \
+    ((uint32_t) (((d) << 24) | ((c) << 16) | ((b) << 8) | (a)))
+
+// Bemanitools Mapper Data
+static const uint32_t mapper_fourcc = FOURCC('B', 'T', 'M', 'D');
+
+static uint32_t mapper_impl_config_load_version(FILE *f);
+static bool mapper_impl_config_load_actions(struct mapper *m, FILE *f, uint32_t version);
+static bool mapper_impl_config_load_analogs(struct mapper *m, FILE *f, uint32_t version);
+static bool mapper_impl_config_load_lights(struct mapper *m, FILE *f, uint32_t version);
 static void mapper_impl_config_save_actions(struct mapper *m, FILE *f);
 static void mapper_impl_config_save_analogs(struct mapper *m, FILE *f);
 static void mapper_impl_config_save_lights(struct mapper *m, FILE *f);
@@ -16,14 +32,17 @@ static void mapper_impl_config_save_lights(struct mapper *m, FILE *f);
 struct mapper *mapper_impl_config_load(FILE *f)
 {
     struct mapper *m;
+    uint32_t version = MAPPER_VERSION_BEFORE_VERSIONING;
 
     hid_mgr_lock(); /* Need to convert from HID objects to /dev nodes */
 
+    version = mapper_impl_config_load_version(f);
+
     m = mapper_impl_create();
 
-    if (!mapper_impl_config_load_actions(m, f) ||
-        !mapper_impl_config_load_analogs(m, f) ||
-        !mapper_impl_config_load_lights(m, f)) {
+    if (!mapper_impl_config_load_actions(m, f, version) ||
+        !mapper_impl_config_load_analogs(m, f, version) ||
+        !mapper_impl_config_load_lights(m, f, version)) {
         mapper_impl_destroy(m);
         m = NULL;
     }
@@ -33,7 +52,29 @@ struct mapper *mapper_impl_config_load(FILE *f)
     return m;
 }
 
-static bool mapper_impl_config_load_actions(struct mapper *m, FILE *f)
+static uint32_t mapper_impl_config_load_version(FILE *f)
+{
+    uint32_t fourcc = 0;
+    uint32_t version = MAPPER_VERSION_BEFORE_VERSIONING;
+
+    if (!read_u32(f, &fourcc)) {
+        return 0;
+    }
+    
+    if (fourcc == mapper_fourcc) {
+        
+        if (!read_u32(f, &version)) {
+            fseek(f, -4, SEEK_CUR);
+        }
+
+    } else {
+        fseek(f, -4, SEEK_CUR);
+    }
+
+    return version;
+}
+
+static bool mapper_impl_config_load_actions(struct mapper *m, FILE *f, uint32_t version)
 {
     char *dev_node;
     struct mapped_action ma;
@@ -69,11 +110,12 @@ static bool mapper_impl_config_load_actions(struct mapper *m, FILE *f)
     return true;
 }
 
-static bool mapper_impl_config_load_analogs(struct mapper *m, FILE *f)
+static bool mapper_impl_config_load_analogs(struct mapper *m, FILE *f, uint32_t version)
 {
     char *dev_node;
     struct mapped_analog ma;
     int32_t sensitivity;
+    bool invert;
     uint8_t nanalogs;
     uint8_t i;
 
@@ -101,8 +143,19 @@ static bool mapper_impl_config_load_analogs(struct mapper *m, FILE *f)
                 return false;
             }
 
+            if (version >= MAPPER_VERSION_INVERT_AXIS) {
+
+                if (!read_u8(f, &invert)) {
+                    return false;
+                }
+
+            } else {
+                invert = false;
+            }
+
             mapper_impl_set_analog_map(m, i, &ma);
             mapper_impl_set_analog_sensitivity(m, i, sensitivity);
+            mapper_impl_set_analog_invert(m, i, invert);
         }
 
         free(dev_node);
@@ -111,7 +164,7 @@ static bool mapper_impl_config_load_analogs(struct mapper *m, FILE *f)
     return true;
 }
 
-static bool mapper_impl_config_load_lights(struct mapper *m, FILE *f)
+static bool mapper_impl_config_load_lights(struct mapper *m, FILE *f, uint32_t version)
 {
     char *dev_node;
     struct mapped_light ml;
@@ -156,8 +209,13 @@ static bool mapper_impl_config_load_lights(struct mapper *m, FILE *f)
 
 void mapper_impl_config_save(struct mapper *m, FILE *f)
 {
+    const uint32_t mapper_latest_version = MAPPER_VERSION_LATEST;
+
     hid_mgr_lock();
 
+    write_u32(f, &mapper_fourcc);
+    write_u32(f, &mapper_latest_version);
+
     mapper_impl_config_save_actions(m, f);
     mapper_impl_config_save_analogs(m, f);
     mapper_impl_config_save_lights(m, f);
@@ -211,6 +269,7 @@ static void mapper_impl_config_save_analogs(struct mapper *m, FILE *f)
 {
     struct mapped_analog ma;
     int32_t sensitivity;
+    bool invert;
     uint8_t nanalogs;
     uint8_t i;
 
@@ -224,10 +283,12 @@ static void mapper_impl_config_save_analogs(struct mapper *m, FILE *f)
             write_str(f, "");
         } else {
             sensitivity = mapper_impl_get_analog_sensitivity(m, i);
+            invert = mapper_impl_get_analog_invert(m, i);
 
             write_str(f, hid_stub_get_dev_node(ma.hid));
             write_u32(f, &ma.control_no);
             write_u32(f, &sensitivity);
+            write_u8(f, &invert);
         }
     }
 }

src/main/geninput/mapper.c

@@ -26,8 +26,10 @@ struct analog_mapping {
     bool bound;
     bool valid;
     bool absolute;
-    double affine_scale;
-    double affine_bias;
+    bool invert;
+    double analog_min;
+    double analog_max;
+    double inv_analog_range;
     uint8_t pos;
 };
 
@@ -169,8 +171,9 @@ static void analog_mapping_bind(struct analog_mapping *am)
 
     ctl = &controls[am->src.control_no];
 
-    am->affine_bias = ctl->value_min;
-    am->affine_scale = ctl->value_max - ctl->value_min;
+    am->analog_min = ctl->value_min;
+    am->analog_max = ctl->value_max;
+    am->inv_analog_range = 1.0 / ((int64_t)ctl->value_max - ctl->value_min);
     am->absolute = !(ctl->flags & HID_FLAG_RELATIVE);
     am->valid = true;
 
@@ -187,6 +190,7 @@ static void analog_mapping_update(struct analog_mapping *am)
 {
     double tmp;
     int32_t value;
+    int8_t delta;
 
     if (!am->bound) {
         analog_mapping_bind(am);
@@ -201,10 +205,24 @@ static void analog_mapping_update(struct analog_mapping *am)
     }
 
     if (am->absolute) {
-        tmp = (value - am->affine_bias) / am->affine_scale;
+
+        if (am->invert) {
+            tmp = am->analog_max - value;
+        } else {
+            tmp = value - am->analog_min;
+        }
+
+        // Scale the input value to [0,1] range
+        tmp *= am->inv_analog_range;
         am->pos = (uint8_t) ((tmp + 0.5) * 256.0);
     } else {
-        am->pos += (int8_t) (value * exp(am->sensitivity / 256.0));
+        delta = (int8_t) (value * exp(am->sensitivity / 256.0));
+
+        if (am->invert) {
+            delta *= -1;
+        }
+
+        am->pos += delta;
     }
 }
 
@@ -406,6 +424,15 @@ int32_t mapper_impl_get_analog_sensitivity(struct mapper *m, uint8_t analog)
     return m->analogs[analog].sensitivity;
 }
 
+bool mapper_impl_get_analog_invert(struct mapper* m, uint8_t analog)
+{
+    if (analog >= m->nanalogs) {
+        return 0;
+    }
+
+    return m->analogs[analog].invert;
+}
+
 uint8_t mapper_impl_get_nanalogs(struct mapper *m)
 {
     return m->nanalogs;
@@ -531,6 +558,18 @@ bool mapper_impl_set_analog_sensitivity(
     return true;
 }
 
+bool mapper_impl_set_analog_invert(
+    struct mapper *m, uint8_t analog, bool invert)
+{
+    if (analog >= m->nanalogs) {
+        return false;
+    }
+
+    m->analogs[analog].invert = invert;
+
+    return true;
+}
+
 void mapper_impl_set_light_map(
     struct mapper *m, const struct mapped_light *ml, uint8_t game_light)
 {

src/main/geninput/mapper.h

@@ -57,6 +57,7 @@ bool mapper_impl_get_analog_map(
 bool mapper_impl_get_action_map(
     struct mapper *m, uint8_t action, uint8_t page, struct mapped_action *ma);
 int32_t mapper_impl_get_analog_sensitivity(struct mapper *m, uint8_t analog);
+bool mapper_impl_get_analog_invert(struct mapper *m, uint8_t analog);
 uint8_t mapper_impl_get_nanalogs(struct mapper *m);
 uint8_t mapper_impl_get_nlights(struct mapper *m);
 uint8_t mapper_impl_get_npages(struct mapper *m);
@@ -73,6 +74,8 @@ bool mapper_impl_set_analog_map(
     struct mapper *m, uint8_t analog, const struct mapped_analog *ma);
 bool mapper_impl_set_analog_sensitivity(
     struct mapper *m, uint8_t analog, int32_t sensitivity);
+bool mapper_impl_set_analog_invert(
+    struct mapper *m, uint8_t analog, bool invert);
 void mapper_impl_set_light_map(
     struct mapper *m, const struct mapped_light *ml, uint8_t game_light);
 void mapper_impl_set_nanalogs(struct mapper *m, uint8_t nanalogs);

src/main/mm/mm.c

@@ -57,7 +57,7 @@ static HANDLE mm_open_device(void)
     dev_info = SetupDiGetClassDevsW(
         &hid_guid, NULL, NULL, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
 
-    if (dev_info == NULL) {
+    if (dev_info == INVALID_HANDLE_VALUE) {
         log_fatal("SetupDiGetClassDevs failed");
     }
 

src/main/p3io/cmd.c

@@ -41,7 +41,7 @@ void p3io_resp_hdr_init(
 {
     log_assert(resp_hdr != NULL);
     log_assert(req_hdr != NULL);
-    log_assert(nbytes < P3IO_MAX_MESSAGE_SIZE);
+    log_assert(nbytes <= P3IO_MAX_MESSAGE_SIZE);
 
     /* Length byte in this packet format counts everything from the length
        byte onwards. The length byte itself occurs at the start of the frame. */

src/main/p3io/cmd.h

@@ -161,6 +161,11 @@ struct p3io_req_rs232_write {
     uint8_t bytes[128];
 };
 
+struct p3io_req_unknown_generic {
+    struct p3io_hdr hdr;
+    uint8_t unknown;
+};
+
 struct p3io_req_raw {
     uint8_t data[P3IO_MAX_MESSAGE_SIZE];
 };
@@ -182,6 +187,7 @@ union p3io_req_any {
     struct p3io_req_rs232_open_close rs232_open_close;
     struct p3io_req_rs232_read rs232_read;
     struct p3io_req_rs232_write rs232_write;
+    struct p3io_req_unknown_generic unknown_generic;
     struct p3io_req_raw raw;
 };
 
@@ -266,6 +272,11 @@ struct p3io_resp_rs232_write {
     uint8_t nbytes;
 };
 
+struct p3io_resp_unknown_generic {
+    struct p3io_hdr hdr;
+    uint8_t unknown;
+};
+
 struct p3io_resp_raw {
     uint8_t data[P3IO_MAX_MESSAGE_SIZE];
 };
@@ -286,6 +297,7 @@ union p3io_resp_any {
     struct p3io_resp_rs232_open_close rs232_open_close;
     struct p3io_resp_rs232_read rs232_read;
     struct p3io_resp_rs232_write rs232_write;
+    struct p3io_resp_unknown_generic unknown_generic;
     struct p3io_resp_raw raw;
 };
 

src/main/p3ioemu/emu.c

@@ -49,6 +49,8 @@ static void p3io_cmd_get_video_freq(
     const struct p3io_req_get_video_freq *req,
     struct p3io_resp_get_video_freq *resp);
 static void
+p3io_cmd_unknown_2b(const struct p3io_req_unknown_2b *req, struct p3io_resp_unknown_2b *resp);
+static void
 p3io_cmd_init(const struct p3io_req_init *req, struct p3io_resp_init *resp);
 static void p3io_cmd_get_coinstock(
     const struct p3io_req_coin_stock *req, struct p3io_resp_coin_stock *resp);
@@ -56,7 +58,7 @@ static void p3io_cmd_set_coin_counter(
     const struct p3io_req_set_coin_counter *req,
     struct p3io_resp_set_coin_counter *resp);
 static void
-p3io_cmd_unknown(const union p3io_req_any *req, struct p3io_resp_raw *resp);
+p3io_cmd_unknown(const struct p3io_req_unknown_generic *req, struct p3io_resp_unknown_generic *resp);
 
 void p3io_emu_init(const struct p3io_ops *ops, void *ctx)
 {
@@ -268,6 +270,11 @@ static HRESULT p3io_cmd_dispatch(const union p3io_req_any *req)
 
             break;
 
+        case P3IO_CMD_UNKNOWN_2B:
+            p3io_cmd_unknown_2b(&req->unknown_2b, &resp.unknown_2b);
+
+            break;
+
         case P3IO_CMD_INIT:
             p3io_cmd_init(&req->init, &resp.init);
 
@@ -301,7 +308,7 @@ static HRESULT p3io_cmd_dispatch(const union p3io_req_any *req)
             break;
 
         default:
-            p3io_cmd_unknown(req, &resp.raw);
+            p3io_cmd_unknown(&req->unknown_generic, &resp.unknown_generic);
 
             break;
     }
@@ -511,6 +518,16 @@ static void p3io_cmd_get_video_freq(
     }
 }
 
+static void
+p3io_cmd_unknown_2b(const struct p3io_req_unknown_2b *req, struct p3io_resp_unknown_2b *resp)
+{
+    log_misc("Unknown 2b");
+
+    p3io_resp_hdr_init(&resp->hdr, sizeof(*resp), &req->hdr);
+
+    resp->unknown = 0;
+}
+
 static void
 p3io_cmd_init(const struct p3io_req_init *req, struct p3io_resp_init *resp)
 {
@@ -557,15 +574,16 @@ static void p3io_cmd_set_coin_counter(
 }
 
 static void
-p3io_cmd_unknown(const union p3io_req_any *req, struct p3io_resp_raw *resp)
+p3io_cmd_unknown(const struct p3io_req_unknown_generic *req, struct p3io_resp_unknown_generic *resp)
 {
-    log_warning("Unsupported P3IO command: %02x", req->hdr.cmd);
+    log_warning("Unsupported P3IO command, sending default response (might not work/crash though): %02x",
+        req->hdr.cmd);
 
-    p3io_resp_hdr_init(
-        (struct p3io_hdr *) &resp->data, sizeof(*resp), &req->hdr);
+    p3io_resp_hdr_init(&resp->hdr, sizeof(*resp), &req->hdr);
 
     // Not always applicable/correct as there are several commands not
     // responding with any data, but fine for the majority of (unsupported)
     // commands
-    resp->data[sizeof(struct p3io_hdr) + 0] = 0;
+    // Remark: This might also lead to unpredictable behaviour or crashes
+    resp->unknown = 0;
 }