diff --git a/src/dev/devBiTestAsyn.c b/src/dev/devBiTestAsyn.c
new file mode 100644
index 000000000..08e2293c7
--- /dev/null
+++ b/src/dev/devBiTestAsyn.c
@@ -0,0 +1,127 @@
+/* devBiTestAsyn.c */
+/* share/src/dev $Id$ */
+
+/* devBiTestAsyn.c - Device Support Routines for testing asynchronous processing*/
+
+
+#include	<vxWorks.h>
+#include	<types.h>
+#include	<stdioLib.h>
+#include	<wdLib.h>
+
+#include	<alarm.h>
+#include	<dbDefs.h>
+#include	<dbAccess.h>
+#include	<recSup.h>
+#include	<devSup.h>
+#include	<link.h>
+#include	<biRecord.h>
+
+/* Create the dset for devBiTestAsyn */
+long init_record();
+long read_bi();
+struct {
+	long		number;
+	DEVSUPFUN	report;
+	DEVSUPFUN	init;
+	DEVSUPFUN	init_record;
+	DEVSUPFUN	get_ioint_info;
+	DEVSUPFUN	read_bi;
+	DEVSUPFUN	special_linconv;
+}devBiTestAsyn={
+	6,
+	NULL,
+	NULL,
+	init_record,
+	NULL,
+	read_bi,
+	NULL};
+
+/* control block for callback*/
+struct callback {
+	void (*callback)();
+	int priority;
+	struct dbAddr dbAddr;
+	WDOG_ID wd_id;
+	void (*process)();
+};
+
+void callbackRequest();
+
+static void myCallback(pcallback)
+    struct callback *pcallback;
+{
+    struct biRecord *pbi=(struct biRecord *)(pcallback->dbAddr.precord);
+
+    dbScanLock(pbi);
+    (pcallback->process)(&pcallback->dbAddr);
+    dbScanUnlock(pbi);
+}
+    
+    
+
+static long init_record(pbi,process)
+    struct biRecord	*pbi;
+    void (*process)();
+{
+    char message[100];
+    struct callback *pcallback;
+
+    /* bi.inp must be a CONSTANT*/
+    switch (pbi->inp.type) {
+    case (CONSTANT) :
+	pcallback = (struct callback *)(calloc(1,sizeof(struct callback)));
+	pbi->dpvt = (caddr_t)pcallback;
+	pcallback->callback = myCallback;
+	pcallback->priority = priorityLow;
+	if(dbNameToAddr(pbi->name,&(pcallback->dbAddr))) {
+		logMsg("dbNameToAddr failed in init_record for devBiTestAsyn\n");
+		exit(1);
+	}
+	pcallback->wd_id = wdCreate();
+	pcallback->process = process;
+	pbi->val = pbi->inp.value.value;
+	break;
+    default :
+	strcpy(message,pbi->name);
+	strcat(message,": devBiTestAsyn (init_record) Illegal INP field");
+	errMessage(S_db_badField,message);
+	return(S_db_badField);
+    }
+    return(0);
+}
+
+static long read_bi(pbi)
+    struct biRecord	*pbi;
+{
+    char message[100];
+    long status,options,nRequest;
+    struct callback *pcallback=(struct callback *)(pbi->dpvt);
+    int		wait_time;
+
+    /* bi.inp must be a CONSTANT*/
+    switch (pbi->inp.type) {
+    case (CONSTANT) :
+	if(pbi->pact) {
+		printf("%s Completed\n",pbi->name);
+		return(0);
+	} else {
+		wait_time = (int)(pbi->val * vxTicksPerSecond);
+		if(wait_time<=0) return(0);
+		printf("%s Starting asynchronous processing\n",pbi->name);
+		wdStart(pcallback->wd_id,wait_time,callbackRequest,pcallback);
+		return(1);
+	}
+    default :
+	if(pbi->nsev<MAJOR_ALARM) {
+		pbi->nsev = MAJOR_ALARM;
+		pbi->nsta = SOFT_ALARM;
+		if(pbi->stat!=SOFT_ALARM) {
+			strcpy(message,pbi->name);
+			strcat(message,": devBiTestAsyn (read_bi) Illegal INP field");
+			errMessage(S_db_badField,message);
+		}
+	}
+    }
+    return(0);
+}
diff --git a/src/dev/devBoTestAsyn.c b/src/dev/devBoTestAsyn.c
new file mode 100644
index 000000000..530be8f15
--- /dev/null
+++ b/src/dev/devBoTestAsyn.c
@@ -0,0 +1,127 @@
+/* devBoTestAsyn.c */
+/* share/src/dev $Id$ */
+
+/* devBoTestAsyn.c - Device Support Routines for testing asynchronous processing*/
+
+
+#include	<vxWorks.h>
+#include	<types.h>
+#include	<stdioLib.h>
+#include	<wdLib.h>
+
+#include	<alarm.h>
+#include	<cvtTable.h>
+#include	<dbDefs.h>
+#include	<dbAccess.h>
+#include	<recSup.h>
+#include	<devSup.h>
+#include	<link.h>
+#include	<boRecord.h>
+
+/* Create the dset for devBoTestAsyn */
+long init_record();
+long write_bo();
+struct {
+	long		number;
+	DEVSUPFUN	report;
+	DEVSUPFUN	init;
+	DEVSUPFUN	init_record;
+	DEVSUPFUN	get_ioint_info;
+	DEVSUPFUN	write_bo;
+	DEVSUPFUN	special_linconv;
+}devBoTestAsyn={
+	6,
+	NULL,
+	NULL,
+	init_record,
+	NULL,
+	write_bo,
+	NULL};
+
+/* control block for callback*/
+struct callback {
+	void (*callback)();
+	int priority;
+	struct dbAddr dbAddr;
+	WDOG_ID wd_id;
+	void (*process)();
+};
+void callbackRequest();
+
+static void myCallback(pcallback)
+    struct callback *pcallback;
+{
+    struct boRecord *pbo=(struct boRecord *)(pcallback->dbAddr.precord);
+
+    dbScanLock(pbo);
+    (pcallback->process)(&pcallback->dbAddr);
+    dbScanUnlock(pbo);
+}
+    
+    
+
+static long init_record(pbo,process)
+    struct boRecord	*pbo;
+    void (*process)();
+{
+    char message[100];
+    struct callback *pcallback;
+
+    /* bo.out must be a CONSTANT*/
+    switch (pbo->out.type) {
+    case (CONSTANT) :
+	pcallback = (struct callback *)(calloc(1,sizeof(struct callback)));
+	pbo->dpvt = (caddr_t)pcallback;
+	pcallback->callback = myCallback;
+	pcallback->priority = priorityLow;
+	if(dbNameToAddr(pbo->name,&(pcallback->dbAddr))) {
+		logMsg("dbNameToAddr failed in init_record for devBoTestAsyn\n");
+		exit(1);
+	}
+	pcallback->wd_id = wdCreate();
+	pcallback->process = process;
+	pbo->val = pbo->inp.value.value;
+	break;
+    default :
+	strcpy(message,pbo->name);
+	strcat(message,": devBoTestAsyn (init_record) Illegal OUT field");
+	errMessage(S_db_badField,message);
+	return(S_db_badField);
+    }
+    return(0);
+}
+
+static long write_bo(pbo)
+    struct boRecord	*pbo;
+{
+    char message[100];
+    long status,options,nRequest;
+    struct callback *pcallback=(struct callback *)(pbo->dpvt);
+    int		wait_time;
+
+    /* bo.out must be a CONSTANT*/
+    switch (pbo->out.type) {
+    case (CONSTANT) :
+	if(pbo->pact) {
+		printf("%s Completed\n",pbo->name);
+		return(0); /* don`t convert*/
+	} else {
+		wait_time = (int)(pbo->val * vxTicksPerSecond);
+		if(wait_time<=0) return(0);
+		printf("%s Starting asynchronous processing\n",pbo->name);
+		wdStart(pcallback->wd_id,wait_time,callbackRequest,pcallback);
+		return(1);
+	}
+    default :
+	if(pbo->nsev<MAJOR_ALARM) {
+		pbo->nsev = MAJOR_ALARM;
+		pbo->nsta = SOFT_ALARM;
+		if(pbo->stat!=SOFT_ALARM) {
+			strcpy(message,pbo->name);
+			strcat(message,": devBoTestAsyn (read_bo) Illegal OUT field");
+			errMessage(S_db_badField,message);
+		}
+	}
+    }
+    return(0);
+}
diff --git a/src/dev/devMbbiTestAsyn.c b/src/dev/devMbbiTestAsyn.c
new file mode 100644
index 000000000..60f1f3747
--- /dev/null
+++ b/src/dev/devMbbiTestAsyn.c
@@ -0,0 +1,127 @@
+/* devMbbiTestAsyn.c */
+/* share/src/dev $Id$ */
+
+/* devMbbiTestAsyn.c - Device Support Routines for testing asynchronous processing*/
+
+
+#include	<vxWorks.h>
+#include	<types.h>
+#include	<stdioLib.h>
+#include	<wdLib.h>
+
+#include	<alarm.h>
+#include	<dbDefs.h>
+#include	<dbAccess.h>
+#include	<recSup.h>
+#include	<devSup.h>
+#include	<link.h>
+#include	<mbbiRecord.h>
+
+/* Create the dset for devMbbiTestAsyn */
+long init_record();
+long read_mbbi();
+struct {
+	long		number;
+	DEVSUPFUN	report;
+	DEVSUPFUN	init;
+	DEVSUPFUN	init_record;
+	DEVSUPFUN	get_ioint_info;
+	DEVSUPFUN	read_mbbi;
+	DEVSUPFUN	special_linconv;
+}devMbbiTestAsyn={
+	6,
+	NULL,
+	NULL,
+	init_record,
+	NULL,
+	read_mbbi,
+	NULL};
+
+/* control block for callback*/
+struct callback {
+	void (*callback)();
+	int priority;
+	struct dbAddr dbAddr;
+	WDOG_ID wd_id;
+	void (*process)();
+};
+
+void callbackRequest();
+
+static void myCallback(pcallback)
+    struct callback *pcallback;
+{
+    struct mbbiRecord *pmbbi=(struct mbbiRecord *)(pcallback->dbAddr.precord);
+
+    dbScanLock(pmbbi);
+    (pcallback->process)(&pcallback->dbAddr);
+    dbScanUnlock(pmbbi);
+}
+    
+    
+
+static long init_record(pmbbi,process)
+    struct mbbiRecord	*pmbbi;
+    void (*process)();
+{
+    char message[100];
+    struct callback *pcallback;
+
+    /* mbbi.inp must be a CONSTANT*/
+    switch (pmbbi->inp.type) {
+    case (CONSTANT) :
+	pcallback = (struct callback *)(calloc(1,sizeof(struct callback)));
+	pmbbi->dpvt = (caddr_t)pcallback;
+	pcallback->callback = myCallback;
+	pcallback->priority = priorityLow;
+	if(dbNameToAddr(pmbbi->name,&(pcallback->dbAddr))) {
+		logMsg("dbNameToAddr failed in init_record for devMbbiTestAsyn\n");
+		exit(1);
+	}
+	pcallback->wd_id = wdCreate();
+	pcallback->process = process;
+	pmbbi->val = pmbbi->inp.value.value;
+	break;
+    default :
+	strcpy(message,pmbbi->name);
+	strcat(message,": devMbbiTestAsyn (init_record) Illegal INP field");
+	errMessage(S_db_badField,message);
+	return(S_db_badField);
+    }
+    return(0);
+}
+
+static long read_mbbi(pmbbi)
+    struct mbbiRecord	*pmbbi;
+{
+    char message[100];
+    long status,options,nRequest;
+    struct callback *pcallback=(struct callback *)(pmbbi->dpvt);
+    int		wait_time;
+
+    /* mbbi.inp must be a CONSTANT*/
+    switch (pmbbi->inp.type) {
+    case (CONSTANT) :
+	if(pmbbi->pact) {
+		printf("%s Completed\n",pmbbi->name);
+		return(0);
+	} else {
+		wait_time = (int)(pmbbi->val * vxTicksPerSecond);
+		if(wait_time<=0) return(0);
+		printf("%s Starting asynchronous processing\n",pmbbi->name);
+		wdStart(pcallback->wd_id,wait_time,callbackRequest,pcallback);
+		return(1);
+	}
+    default :
+	if(pmbbi->nsev<MAJOR_ALARM) {
+		pmbbi->nsev = MAJOR_ALARM;
+		pmbbi->nsta = SOFT_ALARM;
+		if(pmbbi->stat!=SOFT_ALARM) {
+			strcpy(message,pmbbi->name);
+			strcat(message,": devMbbiTestAsyn (read_mbbi) Illegal INP field");
+			errMessage(S_db_badField,message);
+		}
+	}
+    }
+    return(0);
+}
diff --git a/src/dev/devMbboTestAsyn.c b/src/dev/devMbboTestAsyn.c
new file mode 100644
index 000000000..6eef37c73
--- /dev/null
+++ b/src/dev/devMbboTestAsyn.c
@@ -0,0 +1,127 @@
+/* devMbboTestAsyn.c */
+/* share/src/dev $Id$ */
+
+/* devMbboTestAsyn.c - Device Support Routines for testing asynchronous processing*/
+
+
+#include	<vxWorks.h>
+#include	<types.h>
+#include	<stdioLib.h>
+#include	<wdLib.h>
+
+#include	<alarm.h>
+#include	<cvtTable.h>
+#include	<dbDefs.h>
+#include	<dbAccess.h>
+#include	<recSup.h>
+#include	<devSup.h>
+#include	<link.h>
+#include	<mbboRecord.h>
+
+/* Create the dset for devMbboTestAsyn */
+long init_record();
+long write_mbbo();
+struct {
+	long		number;
+	DEVSUPFUN	report;
+	DEVSUPFUN	init;
+	DEVSUPFUN	init_record;
+	DEVSUPFUN	get_ioint_info;
+	DEVSUPFUN	write_mbbo;
+	DEVSUPFUN	special_linconv;
+}devMbboTestAsyn={
+	6,
+	NULL,
+	NULL,
+	init_record,
+	NULL,
+	write_mbbo,
+	NULL};
+
+/* control block for callback*/
+struct callback {
+	void (*callback)();
+	int priority;
+	struct dbAddr dbAddr;
+	WDOG_ID wd_id;
+	void (*process)();
+};
+void callbackRequest();
+
+static void myCallback(pcallback)
+    struct callback *pcallback;
+{
+    struct mbboRecord *pmbbo=(struct mbboRecord *)(pcallback->dbAddr.precord);
+
+    dbScanLock(pmbbo);
+    (pcallback->process)(&pcallback->dbAddr);
+    dbScanUnlock(pmbbo);
+}
+    
+    
+
+static long init_record(pmbbo,process)
+    struct mbboRecord	*pmbbo;
+    void (*process)();
+{
+    char message[100];
+    struct callback *pcallback;
+
+    /* mbbo.out must be a CONSTANT*/
+    switch (pmbbo->out.type) {
+    case (CONSTANT) :
+	pcallback = (struct callback *)(calloc(1,sizeof(struct callback)));
+	pmbbo->dpvt = (caddr_t)pcallback;
+	pcallback->callback = myCallback;
+	pcallback->priority = priorityLow;
+	if(dbNameToAddr(pmbbo->name,&(pcallback->dbAddr))) {
+		logMsg("dbNameToAddr failed in init_record for devMbboTestAsyn\n");
+		exit(1);
+	}
+	pcallback->wd_id = wdCreate();
+	pcallback->process = process;
+	pmbbo->val = pmbbo->inp.value.value;
+	break;
+    default :
+	strcpy(message,pmbbo->name);
+	strcat(message,": devMbboTestAsyn (init_record) Illegal OUT field");
+	errMessage(S_db_badField,message);
+	return(S_db_badField);
+    }
+    return(0);
+}
+
+static long write_mbbo(pmbbo)
+    struct mbboRecord	*pmbbo;
+{
+    char message[100];
+    long status,options,nRequest;
+    struct callback *pcallback=(struct callback *)(pmbbo->dpvt);
+    int		wait_time;
+
+    /* mbbo.out must be a CONSTANT*/
+    switch (pmbbo->out.type) {
+    case (CONSTANT) :
+	if(pmbbo->pact) {
+		printf("%s Completed\n",pmbbo->name);
+		return(0); /* don`t convert*/
+	} else {
+		wait_time = (int)(pmbbo->val * vxTicksPerSecond);
+		if(wait_time<=0) return(0);
+		printf("%s Starting asynchronous processing\n",pmbbo->name);
+		wdStart(pcallback->wd_id,wait_time,callbackRequest,pcallback);
+		return(1);
+	}
+    default :
+	if(pmbbo->nsev<MAJOR_ALARM) {
+		pmbbo->nsev = MAJOR_ALARM;
+		pmbbo->nsta = SOFT_ALARM;
+		if(pmbbo->stat!=SOFT_ALARM) {
+			strcpy(message,pmbbo->name);
+			strcat(message,": devMbboTestAsyn (read_mbbo) Illegal OUT field");
+			errMessage(S_db_badField,message);
+		}
+	}
+    }
+    return(0);
+}