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diff --git a/macros/NonLinear/SAT_f.sci b/macros/NonLinear/SAT_f.sci
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+//  Scicos
+//
+//  Copyright (C) INRIA - METALAU Project <scicos@inria.fr>
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+//
+// See the file ../license.txt
+//
+
+function [x,y,typ]=SAT_f(job,arg1,arg2)
+    x=[];
+    y=[];
+    typ=[];
+    select job
+    case "set" then
+        x=arg1;
+        graphics=arg1.graphics;
+        exprs=graphics.exprs
+        model=arg1.model;
+        while %t do
+            [ok,minp,maxp,pente,exprs]=scicos_getvalue("Set Saturation parameters",..
+            ["Min";"Max";"Slope"],list("vec",1,"vec",1,"vec",1),exprs)
+            if ~ok then
+                break,
+            end
+            if maxp<=0  then
+                message("Max must be strictly positive")
+            elseif pente<=0 then
+                message("Slope must be strictly positive")
+            else
+                rpar=[minp/pente;maxp/pente;pente]
+                model.rpar=rpar
+                model.firing=[] //compatibility
+                graphics.exprs=exprs
+                x.graphics=graphics;
+                x.model=model
+                break
+            end
+        end
+    case "define" then
+        minp=-1;
+        maxp=1;
+        slope=1;
+        rpar=[minp;maxp;slope]
+
+        model=scicos_model()
+        model.sim=list("lusat",1)
+        model.in=1
+        model.nzcross=2
+        model.out=1
+        model.rpar=[minp;maxp;slope]
+        model.blocktype="c"
+        model.dep_ut=[%t %f]
+
+        exprs=[string(minp);string(maxp);string(slope)]
+        gr_i=[]
+        x=standard_define([2 2],model,exprs,gr_i)
+    end
+endfunction