diff --git a/cpu/6502/6502def.h b/cpu/6502/6502def.h
index 2a5f94621..3700e62f1 100644
--- a/cpu/6502/6502def.h
+++ b/cpu/6502/6502def.h
@@ -30,7 +30,7 @@
  *
  * Author: Oliver Schmidt <ol.sc@web.de>
  *
- * @(#)$Id: 6502def.h,v 1.5 2007/12/23 12:32:43 oliverschmidt Exp $
+ * @(#)$Id: 6502def.h,v 1.6 2007/12/23 13:55:38 oliverschmidt Exp $
  */
 
 #ifndef __6502DEF_H__
@@ -60,6 +60,18 @@ typedef unsigned short uip_stats_t;
 #define UIP_ARCH_ADD32  1
 #define UIP_ARCH_CHKSUM 1
 
+#if MTU_SIZE
+#define UIP_CONF_BUFFER_SIZE (UIP_LLH_LEN + MTU_SIZE)
+#else /* MTU_SIZE */
+#define UIP_CONF_BUFFER_SIZE (UIP_LLH_LEN + 1500)
+#endif /* MTU_SIZE */
+
+#if WITH_BOOST
+#define UIP_CONF_TCP_SPLIT 1
+#else /* WITH_BOOST */
+#define UIP_CONF_TCP_SPLIT 0
+#endif /* WITH_BOOST */
+
 #if WITH_CLIENT
 #define UIP_CONF_ACTIVE_OPEN 1
 #else /* WITH_CLIENT */
diff --git a/platform/apple2enh/contiki-conf.h b/platform/apple2enh/contiki-conf.h
index 65d2080c1..254ee7740 100644
--- a/platform/apple2enh/contiki-conf.h
+++ b/platform/apple2enh/contiki-conf.h
@@ -30,7 +30,7 @@
  * 
  * Author: Oliver Schmidt <ol.sc@web.de>
  *
- * $Id: contiki-conf.h,v 1.10 2007/12/23 12:36:41 oliverschmidt Exp $
+ * $Id: contiki-conf.h,v 1.11 2007/12/23 13:57:08 oliverschmidt Exp $
  */
 
 #ifndef __CONTIKI_CONF_H__
@@ -40,9 +40,7 @@
 
 #define LOG_CONF_ENABLED 1
 
-#define UIP_CONF_BUFFER_SIZE 1500
-#define UIP_CONF_TCP_SPLIT   1
-#define UIP_CONF_LOGGING     1
+#define UIP_CONF_LOGGING 0
 
 #define CTK_CONF_MENU_KEY         CH_ESC
 #define CTK_CONF_WINDOWSWITCH_KEY 0x17	/* Ctrl-W */
diff --git a/platform/c64/contiki-conf.h b/platform/c64/contiki-conf.h
index 86642dc65..419d2219f 100644
--- a/platform/c64/contiki-conf.h
+++ b/platform/c64/contiki-conf.h
@@ -30,7 +30,7 @@
  * 
  * Author: Oliver Schmidt <ol.sc@web.de>
  *
- * $Id: contiki-conf.h,v 1.13 2007/12/23 12:38:09 oliverschmidt Exp $
+ * $Id: contiki-conf.h,v 1.14 2007/12/23 13:57:25 oliverschmidt Exp $
  */
 
 #ifndef __CONTIKI_CONF_H__
@@ -40,9 +40,7 @@
 
 #define LOG_CONF_ENABLED 1
 
-#define UIP_CONF_BUFFER_SIZE 1500
-#define UIP_CONF_TCP_SPLIT   1
-#define UIP_CONF_LOGGING     1
+#define UIP_CONF_LOGGING 0
 
 #define CTK_CONF_MENU_KEY         CH_F1
 #define CTK_CONF_WINDOWSWITCH_KEY CH_F3