diff --git a/projects/mips_sys/ise101/mips_sys/Makefile b/projects/mips_sys/ise101/mips_sys/Makefile
index 12d00c8..6f89942 100644
--- a/projects/mips_sys/ise101/mips_sys/Makefile
+++ b/projects/mips_sys/ise101/mips_sys/Makefile
@@ -12,6 +12,7 @@ translate: $(PRJ).ngd
 map: $(PRJ)_map.ncd
 par: $(PRJ).ncd
 bit: $(PRJ).bit
+prom : $(PRJ).mcs
 timing : $(PRJ).twr
 
 # Netlist
@@ -38,6 +39,10 @@ $(PRJ).twr: $(PRJ).ncd $(PRJ).pcf ./project/$(PRJ).ucf
 $(PRJ).bit: $(PRJ).ncd ./project/$(PRJ).ut
 	bitgen -intstyle xflow -f ./project/$(PRJ).ut $(PRJ).ncd
 
+# Promgen
+$(PRJ).mcs: $(PRJ).bit
+	promgen -w -p mcs -c FF -o $(PRJ) -ver 0 $(PRJ).bit -x xcf32p
+
 $(DIRS):
 	mkdir -p $(DIRS)
 
diff --git a/projects/mips_sys/ise101/mips_sys/project/mips_sys.ut b/projects/mips_sys/ise101/mips_sys/project/mips_sys.ut
index c22b05a..352befc 100644
--- a/projects/mips_sys/ise101/mips_sys/project/mips_sys.ut
+++ b/projects/mips_sys/ise101/mips_sys/project/mips_sys.ut
@@ -21,7 +21,7 @@
 -g UnusedPin:PullDown
 -g UserID:0xFFFFFFFF
 -g DCIUpdateMode:AsRequired
--g StartUpClk:JtagClk
+-g StartUpClk:Cclk
 -g DONE_cycle:4
 -g GTS_cycle:5
 -g GWE_cycle:6