=== modified file 'src/rec/aiRecord.dbd'
--- src/rec/aiRecord.dbd	2005-11-15 23:35:34 +0000
+++ src/rec/aiRecord.dbd	2015-03-20 18:34:35 +0000
@@ -176,8 +176,8 @@
 		pp(TRUE)
 		interest(2)
 	}
-	field(ROFF,DBF_LONG) {
-		prompt("Raw Offset, obsolete")
+	field(ROFF,DBF_ULONG) {
+		prompt("Raw Offset")
 		pp(TRUE)
 		interest(2)
 	}

=== modified file 'src/rec/aoRecord.c'
--- src/rec/aoRecord.c	2013-11-20 22:21:10 +0000
+++ src/rec/aoRecord.c	2015-03-20 19:10:43 +0000
@@ -469,10 +469,20 @@
     }
     value -= prec->aoff;
     if (prec->aslo != 0) value /= prec->aslo;
-    if (value >= 0.0)
-        prec->rval = (epicsInt32)(value + 0.5) - prec->roff;
-    else
-        prec->rval = (epicsInt32)(value - 0.5) - prec->roff;
+
+    /* Apply raw offset and limits, round to 32-bit integer */
+    value -= prec->roff;
+    if (value >= 0.0) {
+        if (value >= (0x7fffffff - 0.5))
+            prec->rval = 0x7fffffff;
+        else
+            prec->rval = (epicsInt32)(value + 0.5);
+    } else {
+        if (value > (0.5 - 0x80000000))
+            prec->rval = (epicsInt32)(value - 0.5);
+        else
+            prec->rval = 0x80000000;
+    }
 }
 
 

=== modified file 'src/rec/aoRecord.dbd'
--- src/rec/aoRecord.dbd	2002-07-12 21:35:43 +0000
+++ src/rec/aoRecord.dbd	2015-03-20 17:58:18 +0000
@@ -82,8 +82,8 @@
 		interest(1)
 		size(16)
 	}
-	field(ROFF,DBF_LONG) {
-		prompt("Raw Offset, obsolete")
+	field(ROFF,DBF_ULONG) {
+		prompt("Raw Offset")
 		pp(TRUE)
 		interest(2)
 	}