Index: /trunk/src/VBox/VMM/VMMAll/IEMAllInstructions.cpp.h
===================================================================
--- /trunk/src/VBox/VMM/VMMAll/IEMAllInstructions.cpp.h	(revision 60658)
+++ /trunk/src/VBox/VMM/VMMAll/IEMAllInstructions.cpp.h	(revision 60659)
@@ -1014,4 +1014,8 @@
         IEM_MC_CALC_RM_EFF_ADDR(GCPtrEffDst, bRm, 0);
         IEM_MC_FETCH_CR0_U16(u16Tmp);
+#if IEM_CFG_TARGET_CPU == IEMTARGETCPU_DYNAMIC
+        if (pIemCpu->uTargetCpu == IEMTARGETCPU_286)
+            IEM_MC_OR_LOCAL_U16(u16Tmp, 0xfff0); /* Reserved bits observed all set on real hw. */
+#endif
         IEM_MC_STORE_MEM_U16(pIemCpu->iEffSeg, GCPtrEffDst, u16Tmp);
         IEM_MC_ADVANCE_RIP();