Plus 3A implemented but not running

Core/Cpu/Z80.cs

@@ -120,7 +120,7 @@ namespace Core.Cpu
             Push(PC);
 
             // --- Interrupt Mode Dispatch ---
-            if (InterruptMode == 1)
+            if (InterruptMode == 0 || InterruptMode == 1)
             {
                 // IM 1: Hardcoded jump to ROM address 0x0038
                 PC = 0x0038;
@@ -143,7 +143,6 @@ namespace Core.Cpu
             }
             else
             {
-                // (IM 0 is theoretically possible but essentially unused on the standard Spectrum)
                 throw new NotImplementedException($"Interrupt Mode {InterruptMode} not implemented!");
             }
         }