diff --git a/util/ego/descr/i86.descr b/util/ego/descr/i86.descr
index 4dc7545cd..8dcbb4fe7 100644
--- a/util/ego/descr/i86.descr
+++ b/util/ego/descr/i86.descr
@@ -1,6 +1,78 @@
 
 wordsize: 2
 pointersize: 2
+%%RA
+general registers: 2
+address registers: 0
+floating point registers: 0
+
+register score parameters:
+        local variable:
+                (2 cases)
+                pointer,general
+                        (1 size)
+                        default ->      (8,4)
+                general,general
+                        (1 size)
+                        default ->      (4,2)
+        address of local variable:
+                (2 cases)
+                pointer,general
+                        (1 size)
+                        default ->      (0,0)
+                general,general
+                        (1 size)
+                        default ->      (2,2)
+        constant:
+                (1 sizes)
+                default ->      (2,2)
+        double constant:
+                (1 size)
+                default ->      (-1,-1)
+        address of global variable:
+                (1 size)
+                default ->      (4,2)
+        address of procedure:
+                (1 size)
+                default ->      (2,2)
+
+opening cost parameters:
+        local variable:
+                (2 cases)
+                pointer
+                        (1 size)
+                        default ->      (9,4)
+                general
+                        (1 size)
+                        default ->      (9,4)
+        address of local variable:
+                (2 cases)
+                pointer
+                        (1 size)
+                        default ->      (10,6)
+                general
+                        (1 size)
+                        general ->      (10,6)
+        constant:
+                (1 size)
+                default ->      (4,4)
+        double constant:
+                (1 size)
+                default ->      (1000,1000)
+        address of global variable:
+                (1 size)
+                default ->      (4,4)
+        address of procedure:
+                (1 size)
+                default ->      (4,4)
+
+register save costs:
+        (4 cases)
+        0 -> (0,0)
+        1 -> (18,2)
+        2 -> (36,4)
+        0 -> (0,0)
+
 %%UD
 access costs of global variables:
 	(1 size)
@@ -12,4 +84,4 @@ access costs of local variables:
 overflow harmful?:  no
 array bound harmful?:  no
 %%SP
-global stack pollution allowed?: yes
+global stack pollution allowed?: no