diff -r 5bba01aad0a6 -r 3957ff8e86c6 blackbox/main.c
--- a/blackbox/main.c	Thu Dec 08 17:14:02 2011 +0100
+++ b/blackbox/main.c	Thu Dec 08 17:16:06 2011 +0100
@@ -27,12 +27,12 @@
 
 #define MAX_SLOTS       6
 typedef struct {
-    uint8_t speedlimit; // 4bits speedlimit
-    uint8_t speedminimum; // 4bits speedminimum
+    unsigned speedlimit:4; // 4bits speedlimit
+    unsigned speedminimum:4; // 4bits speedminimum
+    unsigned trackswitch:1; // 1bit bool
     uint8_t fuel;
     uint16_t jumpstart_time, laps;
     u32 lap_time_start, lap_time;
-    uint8_t trackswitch; // 1bit bool
 } cardata;
 
 static unsigned char s[8];