diff --git a/projects/mips_sys/ise101/mips_sys/ucf/systest.ucf b/projects/mips_sys/ise101/mips_sys/ucf/systest.ucf
index 76727f5..a6af4a5 100644
--- a/projects/mips_sys/ise101/mips_sys/ucf/systest.ucf
+++ b/projects/mips_sys/ise101/mips_sys/ucf/systest.ucf
@@ -240,9 +240,6 @@ NET sys_sdr_clk_fb	IOBDELAY = NONE;
 NET sys_sdr_clk_n		IOSTANDARD = SSTL2_I;
 NET sys_sdr_clk_n		FAST; 
 
-NET sys_sdr_cas_qn	IOSTANDARD = SSTL2_I;
-NET sys_sdr_cas_qn	FAST; 
-
 NET sys_sdr_cs_qn		IOSTANDARD = SSTL2_I;
 NET sys_sdr_cs_qn		FAST; 
 
@@ -489,6 +486,8 @@ NET sys_vga_sync_n IOSTANDARD = LVCMOS33;
 #------------------------------------------------------------------------------
 # IO Pad Location Constraints / Properties for AC97 Sound Controller
 #------------------------------------------------------------------------------
+NET "sys_ac97_bit_clk"  TNM_NET = "ac97_clk";
+TIMESPEC "TSACBITCLK" = PERIOD "ac97_clk" 80 ns HIGH 50 %;
 
 NET sys_ac97_bit_clk   LOC = AE10;
 NET sys_ac97_bit_clk   IOSTANDARD = LVCMOS33;
@@ -496,5 +495,6 @@ NET sys_ac97_bit_clk   PERIOD = 80;
 NET sys_ac97_sdata_in  LOC = AD16;
 NET sys_ac97_sdata_in  IOSTANDARD = LVCMOS33;
 NET sys_ac97_sdata_out LOC = C8;
+NET sys_ac97_sdata_out SLEW = FAST;
 NET sys_ac97_ssync     LOC = D9;
-
+NET sys_ac97_ssync     SLEW = FAST;