changing physical constraints to parameters to pass implementation

.project

@@ -9,20 +9,25 @@
 	<natures>
 	</natures>
 	<linkedResources>
+		<link>
+			<name>ise_logs/ISEBitgen.log</name>
+			<type>1</type>
+			<location>/home/andrey/git/x353/ise_logs/ISEBitgen-20150727142725079.log</location>
+		</link>
 		<link>
 			<name>ise_logs/ISEMap.log</name>
 			<type>1</type>
-			<location>/home/andrey/git/x353/ise_logs/ISEMap-20150726165658761.log</location>
+			<location>/home/andrey/git/x353/ise_logs/ISEMap-20150727164109616.log</location>
 		</link>
 		<link>
 			<name>ise_logs/ISENGDBuild.log</name>
 			<type>1</type>
-			<location>/home/andrey/git/x353/ise_logs/ISENGDBuild-20150726165546847.log</location>
+			<location>/home/andrey/git/x353/ise_logs/ISENGDBuild-20150727164109616.log</location>
 		</link>
 		<link>
 			<name>ise_logs/ISEPAR.log</name>
 			<type>1</type>
-			<location>/home/andrey/git/x353/ise_logs/ISEPAR-20150726165911986.log</location>
+			<location>/home/andrey/git/x353/ise_logs/ISEPAR-20150727142725079.log</location>
 		</link>
 		<link>
 			<name>ise_logs/ISEPartgen.log</name>
@@ -32,27 +37,37 @@
 		<link>
 			<name>ise_logs/ISETraceMap.log</name>
 			<type>1</type>
-			<location>/home/andrey/git/x353/ise_logs/ISETraceMap-20150726213039147.log</location>
+			<location>/home/andrey/git/x353/ise_logs/ISETraceMap-20150727164109616.log</location>
+		</link>
+		<link>
+			<name>ise_logs/ISETracePAR.log</name>
+			<type>1</type>
+			<location>/home/andrey/git/x353/ise_logs/ISETracePAR-20150727142725079.log</location>
 		</link>
 		<link>
 			<name>ise_logs/ISExst.log</name>
 			<type>1</type>
-			<location>/home/andrey/git/x353/ise_logs/ISExst-20150726165049304.log</location>
+			<location>/home/andrey/git/x353/ise_logs/ISExst-20150727170341943.log</location>
 		</link>
 		<link>
 			<name>ise_state/x353-map.tgz</name>
 			<type>1</type>
-			<location>/home/andrey/git/x353/ise_state/x353-map-20150726165658761.tgz</location>
+			<location>/home/andrey/git/x353/ise_state/x353-map-20150727164109616.tgz</location>
 		</link>
 		<link>
 			<name>ise_state/x353-ngdbuild.tgz</name>
 			<type>1</type>
-			<location>/home/andrey/git/x353/ise_state/x353-ngdbuild-20150726165546847.tgz</location>
+			<location>/home/andrey/git/x353/ise_state/x353-ngdbuild-20150727164109616.tgz</location>
+		</link>
+		<link>
+			<name>ise_state/x353-par.tgz</name>
+			<type>1</type>
+			<location>/home/andrey/git/x353/ise_state/x353-par-20150727142725079.tgz</location>
 		</link>
 		<link>
 			<name>ise_state/x353-synth.tgz</name>
 			<type>1</type>
-			<location>/home/andrey/git/x353/ise_state/x353-synth-20150726165049304.tgz</location>
+			<location>/home/andrey/git/x353/ise_state/x353-synth-20150727170341943.tgz</location>
 		</link>
 	</linkedResources>
 </projectDescription>

control/clkios353.v

@@ -26,7 +26,10 @@
 **
 */
 // Some placement constraints are in this file
-module dcm333(
+module dcm333#(
+    parameter IOSTANDARD_SDRAM_DIFF = "DIFF_SSTL2_I",
+    parameter SLEW_SDRAM_DIFF =       "SLOW"
+)(
       sclk,   // input global clock, 120MHz, phase=0
       SDCLK,   // positive clock to SDRAM
       SDNCLK,  // negative clock to SDRAM
@@ -99,7 +102,10 @@ DCM #(
     .PSDONE (dcm_done_dcm));
 // BUFG    i_gsdclk (.I(isdclk90), .O(gsdclk));
 
- OBUFDS  i_SDCLK  (.O(SDCLK),.OB(SDNCLK),.I(isdclk));
+ OBUFDS #(
+    .IOSTANDARD(IOSTANDARD_SDRAM_DIFF),
+    .SLEW(SLEW_SDRAM_DIFF))
+    i_SDCLK  (.O(SDCLK),.OB(SDNCLK),.I(isdclk));
 // OBUFDS  i_SDCLK  (.O(SDNCLK),.OB(SDCLK),.I(!isdclk));
 // make dcm_done behave as dcm_ready
    always @ (posedge dcm_clk  or posedge dcm_rst)