new file mode 100644
--- /dev/null
+++ b/packages/compat/uitron/current/src/uit_ifnc.cxx
@@ -0,0 +1,129 @@
+//===========================================================================
+//
+//      uit_ifnc.cxx
+//
+//      uITRON compatibility functions
+//
+//===========================================================================
+//####COPYRIGHTBEGIN####
+//
+// -------------------------------------------
+// The contents of this file are subject to the Cygnus eCos Public License
+// Version 1.0 (the "License"); you may not use this file except in
+// compliance with the License.  You may obtain a copy of the License at
+// http://sourceware.cygnus.com/ecos
+// 
+// Software distributed under the License is distributed on an "AS IS"
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the
+// License for the specific language governing rights and limitations under
+// the License.
+// 
+// The Original Code is eCos - Embedded Cygnus Operating System, released
+// September 30, 1998.
+// 
+// The Initial Developer of the Original Code is Cygnus.  Portions created
+// by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions.  All Rights Reserved.
+// -------------------------------------------
+//
+//####COPYRIGHTEND####
+//===========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):   hmt
+// Contributors:        hmt
+// Date:        1998-03-13
+// Purpose:     uITRON compatibility functions for use in ISRs
+// Description: 
+//
+//####DESCRIPTIONEND####
+//
+//===========================================================================
+
+#include <pkgconf/uitron.h>             // uITRON setup CYGNUM_UITRON_SEMAS
+                                        // CYGPKG_UITRON et al
+
+#ifdef CYGPKG_UITRON
+
+// invoke the inline function definition to create static C linkage
+// functions here:
+#define CYGIMP_UITRON_INLINE_FUNCS
+#include <cyg/compat/uitron/uit_func.h>
+
+// Now ensure that we create *outline* funcs for the ixxx_yyy() functions
+// here, with C names or whatever, as required.
+
+#undef CYGPRI_UITRON_FUNCS_HERE_AND_NOW
+#undef CYGIMP_UITRON_INLINE_FUNCS
+#undef CYG_UIT_FUNC_EXTERN_BEGIN
+#undef CYG_UIT_FUNC_EXTERN_END
+
+#ifdef CYGIMP_UITRON_CPP_OUTLINE_FUNCS
+#define CYG_UIT_FUNC_EXTERN_BEGIN       extern "C++" {
+#define CYG_UIT_FUNC_EXTERN_END         }
+#else
+#define CYG_UIT_FUNC_EXTERN_BEGIN       extern "C" {
+#define CYG_UIT_FUNC_EXTERN_END         }
+#endif
+
+// Get extern C prototypes (or whatever uit_func.h above did)
+#include <cyg/compat/uitron/uit_ifnc.h>
+
+#undef  CYG_UIT_FUNC_INLINE
+#define CYG_UIT_FUNC_INLINE /* blank */
+#define CYGPRI_UITRON_FUNCS_HERE_AND_NOW
+#include <cyg/compat/uitron/uit_ifnc.inl>
+
+volatile int cyg_uit_dsr_actions_head = 0;
+volatile int cyg_uit_dsr_actions_tail = 0;
+
+Cyg_Uit_Action::action
+cyg_uit_dsr_actions[ CYGNUM_UITRON_ISR_ACTION_QUEUESIZE ];
+
+ID
+cyg_uit_dsr_act_ids[ CYGNUM_UITRON_ISR_ACTION_QUEUESIZE ];
+
+CYG_ADDRWORD
+cyg_uit_dsr_act_a1s[ CYGNUM_UITRON_ISR_ACTION_QUEUESIZE ];
+
+void
+cyg_uitron_dsr( unsigned int vector, unsigned int count, unsigned int data )
+{
+    while ( cyg_uit_dsr_actions_tail != cyg_uit_dsr_actions_head ) {
+        switch ( cyg_uit_dsr_actions[ cyg_uit_dsr_actions_tail ] ) {
+        case Cyg_Uit_Action::WUP_TSK:
+            (void)wup_tsk( cyg_uit_dsr_act_ids[ cyg_uit_dsr_actions_tail ] );
+            break;
+#ifdef CYGPKG_UITRON_SEMAS
+#if 0 < CYG_UITRON_NUM( SEMAS )
+        case Cyg_Uit_Action::SIG_SEM:
+            (void)sig_sem( cyg_uit_dsr_act_ids[ cyg_uit_dsr_actions_tail ] );
+            break;
+#endif // 0 < CYG_UITRON_NUM( SEMAS )
+#endif // CYGPKG_UITRON_SEMAS
+#ifdef CYGPKG_UITRON_FLAGS
+#if 0 < CYG_UITRON_NUM( FLAGS )
+        case Cyg_Uit_Action::SET_FLG:
+            (void)set_flg( cyg_uit_dsr_act_ids[ cyg_uit_dsr_actions_tail ],
+                     (UINT)cyg_uit_dsr_act_a1s[ cyg_uit_dsr_actions_tail ] );
+            break;
+#endif // 0 < CYG_UITRON_NUM( FLAGS )
+#endif // CYGPKG_UITRON_FLAGS
+#ifdef CYGPKG_UITRON_MBOXES
+#if 0 < CYG_UITRON_NUM( MBOXES )
+        case Cyg_Uit_Action::SND_MSG:
+            (void)snd_msg( cyg_uit_dsr_act_ids[ cyg_uit_dsr_actions_tail ],
+                  (T_MSG *)cyg_uit_dsr_act_a1s[ cyg_uit_dsr_actions_tail ] );
+            break;
+#endif // 0 < CYG_UITRON_NUM( MBOXES )
+#endif // CYGPKG_UITRON_MBOXES
+        default:
+            CYG_FAIL( "enum Cyg_Uit_Action out of range!" );
+        }
+        cyg_uit_dsr_actions_tail =
+            CYGNUM_UITRON_ISR_ACTION_QUEUEMASK & (1+cyg_uit_dsr_actions_tail);
+    }
+}
+
+#endif // CYGPKG_UITRON
+
+// EOF uit_ifnc.cxx