Fixed #369

setup/InstallScript.cs

@@ -208,7 +208,9 @@ public static ActionResult InstallDrivers(Session session)
         session.Log($"driversDir = {driversDir}");
         string nefconDir = Path.Combine(installDir.FullName, "nefcon");
         session.Log($"nefconDir = {nefconDir}");
-        string archShortName = RuntimeInformation.OSArchitecture.ToString();
+        string archShortName = ArchitectureInfo.IsArm64
+            ? "arm64"
+            : RuntimeInformation.OSArchitecture.ToString();
         session.Log($"archShortName = {archShortName}");
 
         string nefconcPath = Path.Combine(nefconDir, archShortName, "nefconc.exe");
@@ -288,7 +290,9 @@ public static ActionResult InstallBthPS3(Session session)
             ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
 
             using WebClient client = new();
-            client.Headers.Add("X-Vicius-OS-Architecture", RuntimeInformation.OSArchitecture.ToString());
+            client.Headers.Add("X-Vicius-OS-Architecture", ArchitectureInfo.IsArm64
+                ? "arm64"
+                : RuntimeInformation.OSArchitecture.ToString());
 
             string json = client.DownloadString("https://vicius.api.nefarius.systems/api/nefarius/BthPS3/updates.json");
             UpdateResponse? response = JsonConvert.DeserializeObject<UpdateResponse>(json);

setup/Util/ArchitectureInfo.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+
+namespace Nefarius.DsHidMini.Setup.Util;
+
+public static class ArchitectureInfo
+{
+    public static bool IsArm64
+    {
+        get
+        {
+            IntPtr handle = Process.GetCurrentProcess().Handle;
+            IsWow64Process2(handle, out ushort processMachine, out ushort nativeMachine);
+
+            return nativeMachine == 0xaa64;
+        }
+    }
+
+    [DllImport("kernel32.dll", SetLastError = true)]
+    private static extern bool IsWow64Process2(
+        IntPtr process,
+        out ushort processMachine,
+        out ushort nativeMachine
+    );
+}