the ACM parameters have a max size of 1114 bytes

to ensure that all parameters can be saved, expand parameter area by
256 bytes

ArduCopter/defines.h

@@ -345,8 +345,8 @@ enum gcs_severity {
 
 // EEPROM addresses
 #define EEPROM_MAX_ADDR		4096
-// parameters get the first 1KiB of EEPROM, remainder is for waypoints
-#define WP_START_BYTE 0x400 // where in memory home WP is stored + all other WP
+// parameters get the first 1280 bytes of EEPROM, remainder is for waypoints
+#define WP_START_BYTE 0x500 // where in memory home WP is stored + all other WP
 #define WP_SIZE 15
 
 #define ONBOARD_PARAM_NAME_LENGTH 15