--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gpf/osl/os_evt.c	Sun Jul 15 08:15:49 2018 +0000
@@ -0,0 +1,78 @@
+/*
+ * This C module is a reconstruction based on the disassembly of
+ * os_evt.obj in frame_na7_db_fl.lib from the Leonardo package.
+ */
+
+/* set of included headers from COFF symtab: */
+#include <stdio.h>
+#include <string.h>
+#include "gpfconf.h"	/* FreeCalypso addition */
+#include "../../nucleus/nucleus.h"
+#include "typedefs.h"
+#include "os.h"
+#include "gdi.h"
+#include "os_types.h"
+#include "os_glob.h"
+
+extern T_OS_EVTGRP_TABLE_ENTRY EvtGrpTable[];
+
+GLOBAL LONG
+os_SetEvents(OS_HANDLE evt_grp_handle, unsigned event_flags)
+{
+	if (!EvtGrpTable[evt_grp_handle].Name[0])
+		return(OS_ERROR);
+	if (NU_Set_Events(&EvtGrpTable[evt_grp_handle].EvtGrp, event_flags,
+				NU_OR) == NU_SUCCESS)
+		return(OS_OK);
+	else
+		return(OS_ERROR);
+}
+
+GLOBAL LONG
+os_RetrieveEvents(OS_HANDLE evt_grp_handle, unsigned event_flags, char option,
+		  unsigned *retrieved_events, unsigned suspend)
+{
+	if (!EvtGrpTable[evt_grp_handle].Name[0])
+		return(OS_ERROR);
+	if (NU_Retrieve_Events(&EvtGrpTable[evt_grp_handle].EvtGrp,
+				event_flags, option, retrieved_events, suspend)
+			== NU_SUCCESS)
+		return(OS_OK);
+	else
+		return(OS_ERROR);
+}
+
+GLOBAL LONG
+os_GetEventGroupHandle(char *evt_grp_name, OS_HANDLE *evt_grp_handle)
+{
+	int idx;
+
+	for (idx = 0; idx <= MaxEventGroups; idx++) {
+		if (!EvtGrpTable[idx].Name[0])
+			break;
+		if (!strncmp(EvtGrpTable[idx].Name, evt_grp_name,
+				RESOURCE_NAMELEN))
+			break;
+	}
+	if (idx > MaxEventGroups || !EvtGrpTable[idx].Name[0]) {
+		*evt_grp_handle = -1;
+		return(OS_ERROR);
+	}
+	*evt_grp_handle = idx;
+	return(OS_OK);
+}
+
+GLOBAL LONG
+os_EventGroupInformation(OS_HANDLE evt_grp_handle, char *Name,
+			 unsigned *mask_evt, unsigned *tasks_waiting,
+			 OS_HANDLE *first_task)
+{
+	if (!EvtGrpTable[evt_grp_handle].Name[0])
+		return(OS_ERROR);
+	if (NU_Event_Group_Information(&EvtGrpTable[evt_grp_handle].EvtGrp,
+					Name, mask_evt, tasks_waiting,
+					first_task) == NU_SUCCESS)
+		return(OS_OK);
+	else
+		return(OS_ERROR);
+}