diff --git a/README.md b/README.md
index 8fe6990..1c3df44 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,9 @@
 relocation, and a cooperative multitasking event-driven kernel. It also includes
 an IPv4 network stack and a few other things.
 
+Amstrad CPC port
+----------------
+
 This fork is focused on improving the Amstrad CPC port of Contiki. This version
 was done by Kevin Thacker, but he didn't get it much further than showing the
 desktop. At the time, problems with the SDCC compiler and lack of proper
@@ -36,6 +39,14 @@
 
 ![Screenshot of Contiki on CPC](/screenshot.png?raw=true "The Contiki Desktop.")
 
+Bitbox port
+-----------
+
+This port also contains a port for the Bitbox console.
+
+Not much to say, it uses one of the bitbox textmodes, and was surprisingly
+easy to get up and running.
+
 How to use it
 =============
 
@@ -116,8 +127,8 @@
 leaves more than 29K of free RAM for applications. Not bad, but we can do better.
 
 Current memory usage (with memstats.prg + desktop.prg running):
-* Heap size: 29157 bytes
-* Free memory: 24282 bytes
+* Heap size: 29218 bytes
+* Free memory: 24423 bytes
 
 Firmware-based CTK driver
 -------------------------
diff --git a/sdcc-3.6.0.patchset b/sdcc-4.0.0.patchset
similarity index 96%
rename from sdcc-3.6.0.patchset
rename to sdcc-4.0.0.patchset
index b72d90a..4c3f857 100644
--- a/sdcc-3.6.0.patchset
+++ b/sdcc-4.0.0.patchset
@@ -1,11 +1,11 @@
-From f28f97241c95b6434d9a326d8349f25cd16bebfb Mon Sep 17 00:00:00 2001
+From 64c8f32ebb624c1b58a0ab5683eed7577d38a29d Mon Sep 17 00:00:00 2001
 From: Adrien Destugues <pulkomandy@pulkomandy.tk>
 Date: Fri, 22 Jan 2016 21:01:19 +0100
 Subject: Import Kevin Thacker patch for runtime relocation support.
 
 
 diff --git a/sdas/linksrc/Makefile.in b/sdas/linksrc/Makefile.in
-index 56537a5..35f1922 100644
+index 43e16f5..e37b167 100644
 --- a/sdas/linksrc/Makefile.in
 +++ b/sdas/linksrc/Makefile.in
 @@ -47,7 +47,7 @@ ASXXLIBSRC = strcmpi.c
@@ -18,7 +18,7 @@
  LKSOURCES = $(SRC) $(ASXXLIBSRC:%.c=$(ASXXLIB)/%.c)
  
 diff --git a/sdas/linksrc/aslink.h b/sdas/linksrc/aslink.h
-index e0865f8..d9f6316 100644
+index ebad061..7dce058 100644
 --- a/sdas/linksrc/aslink.h
 +++ b/sdas/linksrc/aslink.h
 @@ -1033,6 +1033,8 @@ extern  int     yflag;          /*      -y, enable SDCC Debug output
@@ -31,7 +31,7 @@
                                   */
  extern  int     uflag;          /*      Listing relocation flag
 diff --git a/sdas/linksrc/lkdata.c b/sdas/linksrc/lkdata.c
-index bb83900..bfaa197 100644
+index e03cd6a..db7c8ff 100644
 --- a/sdas/linksrc/lkdata.c
 +++ b/sdas/linksrc/lkdata.c
 @@ -66,6 +66,9 @@ int     oflag;          /*      Output file type flag
@@ -45,7 +45,7 @@
  int     jflag;          /*      NoICE output flag
                           */
 diff --git a/sdas/linksrc/lkmain.c b/sdas/linksrc/lkmain.c
-index 1cc7a45..9d6f916 100644
+index fcf7242..5535b95 100644
 --- a/sdas/linksrc/lkmain.c
 +++ b/sdas/linksrc/lkmain.c
 @@ -233,6 +233,7 @@ main(int argc, char *argv[])
@@ -56,7 +56,7 @@
  
          for(i=1; i<argc; i++) {
                  ip = ib;
-@@ -960,6 +961,11 @@ parse()
+@@ -999,6 +1000,11 @@ parse()
                                          }
                                          return(0);
  
@@ -69,7 +69,7 @@
                                          if (is_sdld() && !(TARGET_IS_Z80 || TARGET_IS_GB)) {
                                                  iramsav();
 diff --git a/sdas/linksrc/lkrloc3.c b/sdas/linksrc/lkrloc3.c
-index cf184f2..6f11cdc 100644
+index b330184..0a83e0f 100644
 --- a/sdas/linksrc/lkrloc3.c
 +++ b/sdas/linksrc/lkrloc3.c
 @@ -31,6 +31,7 @@
@@ -90,7 +90,7 @@
                  error = 0;
                  mode = (int) eval();
  
-@@ -390,6 +394,95 @@ relr3(void)
+@@ -390,6 +394,93 @@ relr3(void)
                          reli -= paga + pags;
                  }
  
@@ -181,12 +181,10 @@
 +			}
 +		}		
 +		}
-+
-+
-                 /*
-                  * R3_BYTE or R3_WORD operation
-                  */
-@@ -755,6 +848,12 @@ rele3()
+ 
+                 /* pdk instruction fusion */
+                 if (TARGET_IS_PDK) {
+@@ -856,6 +947,12 @@ rele3()
          if (uflag != 0) {
                  lkulist(0);
          }
@@ -480,6 +478,6 @@
 +void freerelrec();
 +void relrecwrite();
 -- 
-2.7.0
+2.28.0