diff --git a/Makefile b/Makefile
index cdfb02d..613a0c3 100644
--- a/Makefile
+++ b/Makefile
@@ -47,7 +47,7 @@ $(BUILDDIR)%.rel: $(BUILDDIR)%.asm
 	${ASM} ${AFLAGS} -o $@ $<
 #	mv -f $(addprefix $(basename $^), .lst .rel .sym) .
 
-$(BUILDDIR)rtlplayground.ihx: $(BUILDDIR)crtstart.rel $(OBJS) 
+$(BUILDDIR)rtlplayground.ihx: $(BUILDDIR)crtstart.rel $(OBJS)
 	$(CC) $(CC_FLAGS) -Wl-bHOME=${BOOTLOADER_ADDRESS}  -Wl-bBANK1=0x14000 -Wl-r -o $@ $^
 
 $(BUILDDIR)rtlplayground.img: $(BUILDDIR)rtlplayground.ihx
@@ -63,4 +63,4 @@ $(BUILDDIR)rtlplayground.bin: $(BUILDDIR)rtlplayground.img
 	tools/$(BUILDDIR)fileadder -a $(HTML_LOCATION) -s $(IMAGESIZE) -d html -p html_data $@
 
 
-.PHONY: clean all $(SUBDIRS)
\ No newline at end of file
+.PHONY: clean all $(SUBDIRS)
diff --git a/cmd_parser.c b/cmd_parser.c
index 361670a..3a8ae3e 100644
--- a/cmd_parser.c
+++ b/cmd_parser.c
@@ -18,6 +18,7 @@
 #include "uip/uip.h"
 
 #pragma codeseg BANK1
+#pragma constseg BANK1
 
 extern __xdata uint8_t minPort;
 extern __xdata uint8_t maxPort;
diff --git a/httpd/Makefile b/httpd/Makefile
index d801ddf..08b7023 100644
--- a/httpd/Makefile
+++ b/httpd/Makefile
@@ -17,8 +17,6 @@ $(BUILDDIR)%.asm: %.c
 	$(CC) $(CC_FLAGS) -o $@ -c -S $<
 
 $(BUILDDIR)%.rel: $(BUILDDIR)%.asm
-	./treatasm.py $^ >$^.new
-	mv $^.new $^
 	${ASM} ${AFLAGS} -o $@ $^
 
 clean:
diff --git a/httpd/httpd.c b/httpd/httpd.c
index 98f0d24..289308a 100644
--- a/httpd/httpd.c
+++ b/httpd/httpd.c
@@ -16,6 +16,7 @@
 #define CMARK_S 6
 
 #pragma codeseg BANK1
+#pragma constseg BANK1
 
 extern __code struct f_data f_data[];
 extern __code char * __code mime_strings[];
diff --git a/rtl837x_phy.c b/rtl837x_phy.c
index 420976e..633eef5 100644
--- a/rtl837x_phy.c
+++ b/rtl837x_phy.c
@@ -17,6 +17,7 @@
 #include "phy.h"
 
 #pragma codeseg BANK1
+#pragma constseg BANK1
 
 extern __code uint16_t bit_mask[16];
 
diff --git a/rtl837x_port.c b/rtl837x_port.c
index c603c75..0539ea5 100644
--- a/rtl837x_port.c
+++ b/rtl837x_port.c
@@ -15,6 +15,7 @@
 #include "phy.h"
 
 #pragma codeseg BANK1
+#pragma constseg BANK1
 
 extern __code uint8_t * __code hex;
 extern __code uint16_t bit_mask[16];
diff --git a/tools/fileadder.c b/tools/fileadder.c
index 7b739d8..71d862b 100644
--- a/tools/fileadder.c
+++ b/tools/fileadder.c
@@ -276,7 +276,7 @@ int main(int argc, char **argv)
 	if (arguments.prefix)
 		ibuf_p += snprintf(&ibuf[ibuf_p], INDEX_SIZE - ibuf_p, "#include \"%s.h\"\n\n", arguments.prefix);
 	if (arguments.bank)
-		ibuf_p += snprintf(&ibuf[ibuf_p], INDEX_SIZE - ibuf_p, "#pragma codeseg %s\n\n", arguments.bank);
+		ibuf_p += snprintf(&ibuf[ibuf_p], INDEX_SIZE - ibuf_p, "#pragma codeseg %s\n#pragma constseg %s\n\n", arguments.bank, arguments.bank);
 	ibuf_p += snprintf(&ibuf[ibuf_p], INDEX_SIZE - ibuf_p, " __code char * __code mime_strings[] = {\n  \"text/html\",\n  \"image/svg+xml\",\n"
 		"  \"image/svg+xml\",\n  \"image/png\",\n  \"text/javascript\",\n  \"text/css\",\n  \"text/plain\"};\n\n");
 	ibuf_p += snprintf(&ibuf[ibuf_p], INDEX_SIZE - ibuf_p, "__code struct f_data f_data[] = {\n");
diff --git a/uip/psock.c b/uip/psock.c
index ca92d8e..eb4d1af 100644
--- a/uip/psock.c
+++ b/uip/psock.c
@@ -48,6 +48,7 @@
 #define STATE_DATA_SENT 6
 
 #pragma codeseg BANK1
+#pragma constseg BANK1
 
 /*
  * Return value of the buffering functions that indicates that a
diff --git a/uip/timer.c b/uip/timer.c
index 7322c1e..cb52151 100644
--- a/uip/timer.c
+++ b/uip/timer.c
@@ -49,6 +49,7 @@
 #include "timer.h"
 
 #pragma codeseg BANK1
+#pragma constseg BANK1
 
 /*---------------------------------------------------------------------------*/
 /**
diff --git a/uip/uip-fw.c b/uip/uip-fw.c
index 44b34f5..4b66979 100644
--- a/uip/uip-fw.c
+++ b/uip/uip-fw.c
@@ -60,6 +60,7 @@
 #include "uip-fw.h"
 
 #pragma codeseg BANK1
+#pragma constseg BANK1
 
 #include "../rtl837x_common.h"
 
diff --git a/uip/uip-neighbor.c b/uip/uip-neighbor.c
index b8f9912..0795cef 100644
--- a/uip/uip-neighbor.c
+++ b/uip/uip-neighbor.c
@@ -44,7 +44,7 @@
 #include "../rtl837x_common.h"
 
 #pragma codeseg BANK1
-
+#pragma constseg BANK1
 
 #define MAX_TIME 128
 
diff --git a/uip/uip-split.c b/uip/uip-split.c
index cc52699..0cc1faa 100644
--- a/uip/uip-split.c
+++ b/uip/uip-split.c
@@ -41,8 +41,8 @@
 #include "uip-fw.h"
 #include "uip_arch.h"
 
-
 #pragma codeseg BANK1
+#pragma constseg BANK1
 
 #define BUF ((__xdata struct uip_tcpip_hdr *)&uip_buf[UIP_LLH_LEN])
 
diff --git a/uip/uip.c b/uip/uip.c
index 2f76efc..ad64329 100644
--- a/uip/uip.c
+++ b/uip/uip.c
@@ -84,6 +84,7 @@
 #include "uip_arch.h"
 
 #pragma codeseg BANK1
+#pragma constseg BANK1
 
 #if UIP_CONF_IPV6
 #include "uip-neighbor.h"
diff --git a/uip/uip_arp.c b/uip/uip_arp.c
index 42dab10..ca8ad1e 100644
--- a/uip/uip_arp.c
+++ b/uip/uip_arp.c
@@ -64,6 +64,7 @@
 #include "../rtl837x_common.h"
 
 #pragma codeseg BANK1
+#pragma constseg BANK1
 
 struct arp_hdr_i {
   struct uip_eth_hdr ethhdr;
diff --git a/uip/uiplib.c b/uip/uiplib.c
index 62dc253..808a5f1 100644
--- a/uip/uiplib.c
+++ b/uip/uiplib.c
@@ -38,6 +38,7 @@
 #include "uiplib.h"
 
 #pragma codeseg BANK1
+#pragma constseg BANK1
 
 /*-----------------------------------------------------------------------------------*/
 unsigned char