diff --git a/.gitignore b/.gitignore
index aaa9626..b3ae175 100644
--- a/.gitignore
+++ b/.gitignore
@@ -86,4 +86,6 @@ experiment/*.pnm
 experiment/*.o
 experiment/muxplanes
 experiment/movepixels
+experiment/tcache
+
 
diff --git a/experiment/Makefile b/experiment/Makefile
index 7855e93..829cf74 100644
--- a/experiment/Makefile
+++ b/experiment/Makefile
@@ -5,10 +5,12 @@
 
 COPT = -Wall -fpic -g -DDEBUG_LEVEL=1 -lm
 DEPS = ../floatimg.h  ../libfloatimg.a Makefile
-LIBS = -ltiff -lpnglite -lcfitsio
+LIBS = ../libfloatimg.a -ltiff -lpnglite -lcfitsio
 
 all:	assemblage extracteur muxplanes movepixels
 
+# ---------------------------------------------------------
+
 assemblage:	assemblage.c ${DEPS} 
 	gcc $(COPT) $< ../libfloatimg.a ${LIBS} -o $@
 
@@ -16,7 +18,20 @@ extracteur:	extracteur.c ${DEPS}
 	gcc $(COPT) $<  ../libfloatimg.a ${LIBS} -o $@
 
 muxplanes:	muxplanes.c ${DEPS}
-	gcc $(COPT) $<  ../libfloatimg.a ${LIBS} -o $@
+	gcc $(COPT) $<   ${LIBS} -o $@
 
 movepixels:	movepixels.c ${DEPS}
 	gcc $(COPT) $<  ../libfloatimg.a ${LIBS} -o $@
+
+# ---------------------------------------------------------
+#			CACHE ENGINE
+
+cachengn.o:	cachengn.c cachengn.h Makefile
+	gcc $(COPT) -c $< 
+
+tcache.o:	tcache.c cachengn.h Makefile
+	gcc $(COPT) -c $< 
+
+tcache:		tcache.o cachengn.o Makefile
+	gcc $(COPT) tcache.o cachengn.o $(LIBS) -o $@
+
diff --git a/experiment/cachengn.c b/experiment/cachengn.c
new file mode 100644
index 0000000..ccfc30d
--- /dev/null
+++ b/experiment/cachengn.c
@@ -0,0 +1,18 @@
+/*
+ *		the chache engine - code
+ */
+
+#include  <stdio.h>
+
+#include  "cachengn.h"
+
+/* ------------------------------------------------------------ */
+
+void cachengn_print_version(int k)
+{
+
+printf("this is the version ZERO !!!\n");
+
+}
+
+/* ------------------------------------------------------------ */
diff --git a/experiment/cachengn.h b/experiment/cachengn.h
new file mode 100644
index 0000000..e8186e9
--- /dev/null
+++ b/experiment/cachengn.h
@@ -0,0 +1,5 @@
+/*
+ *		the chache engine - header
+ */
+
+void cachengn_print_version(int k);
diff --git a/experiment/tcache.c b/experiment/tcache.c
new file mode 100644
index 0000000..70596c1
--- /dev/null
+++ b/experiment/tcache.c
@@ -0,0 +1,18 @@
+/*
+ *		tests du systeme de cache
+ */
+
+#include  <stdio.h>
+
+#include  "cachengn.h"
+
+/* ------------------------------------------------------------ */
+int main(int argc, char *argv[])
+{
+
+fprintf(stderr, "Test of the cache engin - %s %s\n", __DATE__, __TIME__);
+
+return 0;
+}
+/* ------------------------------------------------------------ */
+