diff --git a/lib/CPUs/MIPS/bsp/examples/Makefile b/lib/CPUs/MIPS/bsp/examples/Makefile
index b4ca337..dddd447 100644
--- a/lib/CPUs/MIPS/bsp/examples/Makefile
+++ b/lib/CPUs/MIPS/bsp/examples/Makefile
@@ -18,7 +18,7 @@ all: $(PROG)
 libsys: startup.S kernel.S libsys.c xcpt.c irq.c
 	$(CC) $(CFLAGS) -G 0 -c startup.S -o startup.o
 	$(CC) $(CFLAGS) -G 0 -c kernel.S -o kernel.o
-	$(CC) $(CFLAGS) -G 0 -DSTDERR_FUNCTION=_cg_putchar -DSTDOUT_FUNCTION=_putchar -c libsys.c -o libsys.o
+	$(CC) $(CFLAGS) -G 0 -DSTDERR_FUNCTION=_ser_putchar -DSTDOUT_FUNCTION=_ser_putchar -D_putchar=_ser_putchar -c libsys.c -o libsys.o
 	$(CC) $(CFLAGS) -G 0 -c xcpt.c -o xcpt.o
 	$(CC) $(CFLAGS) -G 0 -c irq.c -o irq.o
 	$(CC) $(CFLAGS) -G 0 -c dbg.c -o dbg.o
@@ -188,5 +188,13 @@ jman_polys:	$(JMAN_SRC) jman/main_polypin.c jman/polys.c
 	$(OBJCOPY) -O srec $@.elf $@.srec
 	$(FLASHGEN) $@.bin $(ENDIAN_FLAGS)
 
+serdump: serdump.c 
+	$(CC) $(CFLAGS) -O3 -o $@.elf -O2 serdump.c $(LIBS) >$@.map
+	$(OBJDUMP) -d $@.elf > $@.dis
+	$(OBJCOPY) $@.elf -O binary $@.bin
+	$(OBJCOPY) -O srec $@.elf $@.srec
+	$(FLASHGEN) $@.bin $(ENDIAN_FLAGS)
+
+
 clean:
 	rm -rf *.a *.o *.bin *.map *.dis *.srec *.elf $(PROG) > /dev/null