diff --git a/ports/6502/sys_c64.c b/ports/6502/sys_c64.c
index 1ed52fd..a282c0b 100644
--- a/ports/6502/sys_c64.c
+++ b/ports/6502/sys_c64.c
@@ -114,7 +114,7 @@ sys_arch_timeouts(void)
 }
 /*-----------------------------------------------------------------------------------*/
 sys_thread_t
-sys_thread_new(void (* function)(void *arg), void *arg)
+sys_thread_new(void (* function)(void *arg), void *arg, int prio)
 {
     return 0;
 }
diff --git a/ports/coldfire/netif/5272fec.c b/ports/coldfire/netif/5272fec.c
index 5addc15..bd92427 100644
--- a/ports/coldfire/netif/5272fec.c
+++ b/ports/coldfire/netif/5272fec.c
@@ -741,7 +741,7 @@ etharp_timer_thread(void *arg)
 static void
 etharp_timer_init(void *arg)
 {
-    sys_thread_new((void *)etharp_timer_thread, arg);
+    sys_thread_new((void *)etharp_timer_thread, arg, DEFAULT_THREAD_PRIO);
 }
 
 
diff --git a/ports/coldfire/proj/lwipopts.h b/ports/coldfire/proj/lwipopts.h
index 2e0768b..8b63207 100644
--- a/ports/coldfire/proj/lwipopts.h
+++ b/ports/coldfire/proj/lwipopts.h
@@ -200,4 +200,17 @@ a lot of data that needs to be copied, this should be set high. */
 
 #define LWIP_COMPAT_SOCKETS 1
 #define LWIP_PROVIDE_ERRNO 1
+
+/* People often make a mistake on the priority of their communications task.
+   The TCP/IP stack should be at a relatively low priority if it is an endpoint
+   (not a router) on a somewhat underpowered CPU. You are'nt going to keep up
+   with network traffic during a denial of service attack or misconfigured network
+   and you don't want an overburdened network task to cause other important tasks
+   (including your UI) to stop working. Drop packets! It forces flow control and
+   lets the rest of your system run.
+*/
+#define TCPIP_THREAD_PRIO 220         // Relatively low priority
+
+#define DEFAULT_THREAD_PRIO 240
+
 #endif /* __LWIPOPTS_H__ */
diff --git a/ports/coldfire/sys_arch.c b/ports/coldfire/sys_arch.c
index 92216b7..84db9fc 100644
--- a/ports/coldfire/sys_arch.c
+++ b/ports/coldfire/sys_arch.c
@@ -73,15 +73,6 @@ static struct sys_hisr *hisrs = NULL;
 #define SYS_MBOX_SIZE 128               // Number of elements in mbox queue
 #define SYS_STACK_SIZE 2048             // A minimum Nucleus stack for coldfire
 #define SYS_HISR_STACK_SIZE 2048             // A minimum Nucleus stack for coldfire
-/* People often make a mistake on the priority of their communications task.
-   The TCP/IP stack should be at a relatively low priority if it is an endpoint
-   (not a router) on a somewhat underpowered CPU. You are'nt going to keep up
-   with network traffic during a denial of service attack or misconfigured network
-   and you don't want an overburdened network task to cause other important tasks
-   (including your UI) to stop working. Drop packets! It forces flow control and
-   lets the rest of your system run.
-*/
-#define SYS_THREAD_PRIORITY 220         // Relatively low priority
 
 /*---------------------------------------------------------------------------------*/
 void
@@ -127,7 +118,7 @@ introduce_thread(NU_TASK *id, void (*function)(void *arg), void *arg)
 /* We use Nucleus task as thread. Create one with a standard size stack at a standard
  * priority. */
 sys_thread_t
-sys_thread_new(void (*function)(void *arg), void *arg)
+sys_thread_new(void (*function)(void *arg), void *arg, int prio)
 {
     NU_TASK *p_thread;
     u8_t *p_stack;
@@ -156,7 +147,7 @@ sys_thread_new(void (*function)(void *arg), void *arg)
                                         st,
                                         p_stack,
                                         SYS_STACK_SIZE,
-                                        SYS_THREAD_PRIORITY,
+                                        prio,
                                         0,                          //Disable timeslicing
                                         NU_PREEMPT,
                                         NU_START);
diff --git a/ports/rtxc/netif/sioslipif.c b/ports/rtxc/netif/sioslipif.c
index 847be57..60ad2e6 100644
--- a/ports/rtxc/netif/sioslipif.c
+++ b/ports/rtxc/netif/sioslipif.c
@@ -164,7 +164,7 @@ sioslipif_init(struct netif *netif)
   netif->output = sioslipif_output;
 
   netif_pass = netif;
-  sys_thread_new((void *)sioslipif_loop, NULL);
+  sys_thread_new((void *)sioslipif_loop, NULL, DEFAULT_THREAD_PRIO);
   /* Do some magic to make it possible to receive data from the serial I/O device. */
 }
 /*-----------------------------------------------------------------------------------*/
diff --git a/ports/rtxc/sys_arch.c b/ports/rtxc/sys_arch.c
index b20b27e..45edbb5 100644
--- a/ports/rtxc/sys_arch.c
+++ b/ports/rtxc/sys_arch.c
@@ -242,10 +242,10 @@ sys_thread(void)
 }
 /*-----------------------------------------------------------------------------------*/
 sys_thread_t
-sys_thread_new(void (* function)(void *arg), void *arg) 
+sys_thread_new(void (* function)(void *arg), void *arg, int prio) 
 {
   TASK newtask;
-  PRIORITY pri = 2;       /* This may have to be changed. */
+  PRIORITY pri = prio;       /* This may have to be changed. */
   char *stack;
   int stacksize = 512;   /* This may have to be changed. */
   struct sys_thread_arg threadarg;
diff --git a/ports/unix/include/arch/cc.h b/ports/unix/include/arch/cc.h
index 96205e7..7010a5d 100644
--- a/ports/unix/include/arch/cc.h
+++ b/ports/unix/include/arch/cc.h
@@ -36,9 +36,9 @@
 #include <string.h>
 
 /* Define platform endianness */
-#ifndef BYTE_ORDER
-#define BYTE_ORDER LITTLE_ENDIAN
-#endif /* BYTE_ORDER */
+//#ifndef BYTE_ORDER
+//#define BYTE_ORDER LITTLE_ENDIAN
+//#endif /* BYTE_ORDER */
 
 /* Define generic types used in lwIP */
 typedef unsigned   char    u8_t;
diff --git a/ports/unix/netif/delif.c b/ports/unix/netif/delif.c
index 6b353f9..6b42f98 100644
--- a/ports/unix/netif/delif.c
+++ b/ports/unix/netif/delif.c
@@ -314,7 +314,7 @@ delif_init_thread(struct netif *netif)
   del->netif->netmask = netif->netmask;
   del->input = netif->input;
   del->netif->input = delif_input;
-  sys_thread_new(delif_thread, netif);
+  sys_thread_new(delif_thread, netif, DEFAULT_THREAD_PRIO);
   return ERR_OK;
 }
 
diff --git a/ports/unix/netif/pcapif.c b/ports/unix/netif/pcapif.c
index f41440a..92e0233 100644
--- a/ports/unix/netif/pcapif.c
+++ b/ports/unix/netif/pcapif.c
@@ -209,7 +209,7 @@ pcapif_init(struct netif *netif)
   p->p = NULL;
   p->lasttime = 0; 
   
-  sys_thread_new(pcapif_thread, netif);
+  sys_thread_new(pcapif_thread, netif, DEFAULT_THREAD_PRIO);
   return ERR_OK;
 }
 /*-----------------------------------------------------------------------------------*/
diff --git a/ports/unix/netif/tapif.c b/ports/unix/netif/tapif.c
index 7fd520c..8d10eba 100644
--- a/ports/unix/netif/tapif.c
+++ b/ports/unix/netif/tapif.c
@@ -126,7 +126,7 @@ low_level_init(struct netif *netif)
   
   DEBUGF(TAPIF_DEBUG, ("tapif_init: system(\"%s\");\n", buf));
   system(buf);
-  sys_thread_new(tapif_thread, netif);
+  sys_thread_new(tapif_thread, netif, DEFAULT_THREAD_PRIO);
 
 }
 /*-----------------------------------------------------------------------------------*/
diff --git a/ports/unix/netif/tunif.c b/ports/unix/netif/tunif.c
index f24d81f..910b7e0 100644
--- a/ports/unix/netif/tunif.c
+++ b/ports/unix/netif/tunif.c
@@ -97,7 +97,7 @@ low_level_init(struct netif *netif)
   
   DEBUGF(TUNIF_DEBUG, ("tunif_init: system(\"%s\");\n", buf));
   system(buf);
-  sys_thread_new(tunif_thread, netif);
+  sys_thread_new(tunif_thread, netif, DEFAULT_THREAD_PRIO);
 
 }
 /*-----------------------------------------------------------------------------------*/
diff --git a/ports/unix/netif/unixif.c b/ports/unix/netif/unixif.c
index 76c4bcc..ca28b31 100644
--- a/ports/unix/netif/unixif.c
+++ b/ports/unix/netif/unixif.c
@@ -452,8 +452,8 @@ unixif_init_server(struct netif *netif)
 
   unixif->fd = fd2;
   unixif->sem = sys_sem_new(0);
-  sys_thread_new(unixif_thread, netif);
-  sys_thread_new(unixif_thread2, netif);
+  sys_thread_new(unixif_thread, netif, DEFAULT_THREAD_PRIO);
+  sys_thread_new(unixif_thread2, netif, DEFAULT_THREAD_PRIO);
   return ERR_OK;
 }
 /*-----------------------------------------------------------------------------------*/
@@ -476,8 +476,8 @@ unixif_init_client(struct netif *netif)
   }
   unixif->q = list_new(UNIXIF_QUEUELEN);
   unixif->sem = sys_sem_new(0);
-  sys_thread_new(unixif_thread, netif);
-  sys_thread_new(unixif_thread2, netif);
+  sys_thread_new(unixif_thread, netif, DEFAULT_THREAD_PRIO);
+  sys_thread_new(unixif_thread2, netif, DEFAULT_THREAD_PRIO);
   return ERR_OK;
 }
 /*-----------------------------------------------------------------------------------*/
diff --git a/ports/unix/proj/unixsim/Makefile b/ports/unix/proj/unixsim/Makefile
index 6734e7b..fc59553 100644
--- a/ports/unix/proj/unixsim/Makefile
+++ b/ports/unix/proj/unixsim/Makefile
@@ -66,7 +66,7 @@ NETIFFILES=$(LWIPDIR)/netif/loopif.c \
 	$(LWIPDIR)/netif/etharp.c $(LWIPDIR)/netif/slipif.c 
 
 # ARCHFILES: Architecture specific files.
-ARCHFILES=$(wildcard $(LWIPARCH)/*.c $(LWIPARCH)/netif/*.c)
+ARCHFILES=$(wildcard $(LWIPARCH)/*.c $(LWIPARCH)/netif/tapif.c $(LWIPARCH)/netif/tcpdump.c)
 
 # APPFILES: Applications.
 APPFILES=apps/fs.c apps/httpd.c \
diff --git a/ports/unix/proj/unixsim/apps/shell.c b/ports/unix/proj/unixsim/apps/shell.c
index 3b1e95e..216eed2 100644
--- a/ports/unix/proj/unixsim/apps/shell.c
+++ b/ports/unix/proj/unixsim/apps/shell.c
@@ -1052,7 +1052,7 @@ shell_thread(void *arg)
 void
 shell_init(void)     
 {
-  sys_thread_new(shell_thread, NULL);
+  sys_thread_new(shell_thread, NULL, DEFAULT_THREAD_PRIO);
 }
 
 
diff --git a/ports/unix/proj/unixsim/apps/tcpecho.c b/ports/unix/proj/unixsim/apps/tcpecho.c
index 1a3ce68..83ad9e6 100644
--- a/ports/unix/proj/unixsim/apps/tcpecho.c
+++ b/ports/unix/proj/unixsim/apps/tcpecho.c
@@ -80,7 +80,7 @@ tcpecho_thread(void *arg)
 void
 tcpecho_init(void)
 {
-  sys_thread_new(tcpecho_thread, NULL);  
+  sys_thread_new(tcpecho_thread, NULL, DEFAULT_THREAD_PRIO);  
 }
 /*-----------------------------------------------------------------------------------*/
 
diff --git a/ports/unix/proj/unixsim/apps/udpecho.c b/ports/unix/proj/unixsim/apps/udpecho.c
index c87a54b..733d34c 100644
--- a/ports/unix/proj/unixsim/apps/udpecho.c
+++ b/ports/unix/proj/unixsim/apps/udpecho.c
@@ -62,5 +62,5 @@ udpecho_thread(void *arg)
 void
 udpecho_init(void)
 {
-  sys_thread_new(udpecho_thread, NULL);
+  sys_thread_new(udpecho_thread, NULL, DEFAULT_THREAD_PRIO);
 }
diff --git a/ports/unix/proj/unixsim/simhost.c b/ports/unix/proj/unixsim/simhost.c
index c314ac2..adf49ae 100644
--- a/ports/unix/proj/unixsim/simhost.c
+++ b/ports/unix/proj/unixsim/simhost.c
@@ -174,7 +174,7 @@ main(int argc, char **argv)
   
   printf("System initialized.\n");
     
-  sys_thread_new((void *)(main_thread), NULL);
+  sys_thread_new((void *)(main_thread), NULL, DEFAULT_THREAD_PRIO);
   pause();
   return 0;
 }
diff --git a/ports/unix/proj/unixsim/simnode.c b/ports/unix/proj/unixsim/simnode.c
index 0d95dfd..c6d9e67 100644
--- a/ports/unix/proj/unixsim/simnode.c
+++ b/ports/unix/proj/unixsim/simnode.c
@@ -139,7 +139,7 @@ main(int argc, char **argv)
   
   printf("System initialized.\n");
     
-  sys_thread_new((void *)(main_thread), NULL);
+  sys_thread_new((void *)(main_thread), NULL, DEFAULT_THREAD_PRIO);
   pause();
   return 0;
 }
diff --git a/ports/unix/proj/unixsim/simrouter.c b/ports/unix/proj/unixsim/simrouter.c
index 27a9ac1..c2d0644 100644
--- a/ports/unix/proj/unixsim/simrouter.c
+++ b/ports/unix/proj/unixsim/simrouter.c
@@ -150,7 +150,7 @@ main(int argc, char **argv)
   
   printf("System initialized.\n");
     
-  sys_thread_new((void *)(main_thread), NULL);
+  sys_thread_new((void *)(main_thread), NULL, DEFAULT_THREAD_PRIO);
   pause();
   return 0;
 }
diff --git a/ports/unix/sys_arch.c b/ports/unix/sys_arch.c
index bff5f52..c93953a 100644
--- a/ports/unix/sys_arch.c
+++ b/ports/unix/sys_arch.c
@@ -151,7 +151,7 @@ current_thread(void)
 }
 /*-----------------------------------------------------------------------------------*/
 sys_thread_t
-sys_thread_new(void (*function)(void *arg), void *arg)
+sys_thread_new(void (*function)(void *arg), void *arg, int prio)
 {
   int code;
   pthread_t tmp;