diff --git a/src/pinproc.cpp b/src/pinproc.cpp
index 3f82789..a03d7b6 100644
--- a/src/pinproc.cpp
+++ b/src/pinproc.cpp
@@ -234,11 +234,17 @@ PR_EXPORT void PRDriverStatePatter(PRDriverState *driver, uint16_t millisecondsO
 
 PR_EXPORT uint16_t PRDecode(PRMachineType machineType, const char *str)
 {
+    uint16_t x;
+    printf("hello\n");
+
     if (str == NULL)
         return 0;
-    if (strlen(str) != 3)
-        return atoi(str);
-    uint16_t x = (str[1]-'0') * 10 + (str[2]-'0');
+
+    if ( strlen(str) == 3 )
+        x = (str[1]-'0') * 10 + (str[2]-'0');
+    else if ( strlen(str) == 4)
+        x = (str[2]-'0') * 10 + (str[3]-'0');
+    else return atoi(str);
     
     if (machineType == kPRMachineWPC)
     {
@@ -273,6 +279,36 @@ PR_EXPORT uint16_t PRDecode(PRMachineType machineType, const char *str)
             }
         }
     }
+    else if (machineType == kPRMachineStern)
+    {
+        printf("hi\n");
+        switch (str[0])
+        {
+            case 'L':
+            case 'l':
+                return 80 + 16 * (7 - ((x - 1) % 8)) + (x - 1) / 8;
+            case 'C':
+            case 'c':
+                return x + 31;
+            case 'S':
+            case 's':
+            {
+                switch (str[1])
+                {
+                    case 'D':
+                    case 'd':
+                        if (strlen(str) == 3) 
+                            return (str[2]-'0') + 7;
+                        else return x + 7;
+                    default:
+                        if ((x - 1) % 16 < 8)
+                           return 32 + 8 * (x / 8)  + (7 - ((x - 1) % 8));
+                        else
+                           return 32 + (x - 1);
+                }
+            }
+        }
+    }
     return atoi(str);
 }