diff --git a/sim/Makefile b/sim/Makefile
new file mode 100644
index 0000000..3869c30
--- /dev/null
+++ b/sim/Makefile
@@ -0,0 +1,24 @@
+ifdef seed
+    vcs_run_opts += +ntb_random_seed=${seed}
+else
+    vcs_run_opts += +ntb_random_seed_automatic
+endif
+
+VCS  = vcs -full64  -sverilog  +lint=TFIPC-L +v2k -debug_access+all  -q -timescale=1ns/1ps +nospecify  -l compile.log  
+SIMV = ./simv $(vcs_run_opts) -l sim.log +fsdb+delta
+all:comp run
+
+comp:
+	${VCS} -f files.f
+
+run:
+	${SIMV}
+
+dbg:
+	verdi -sv -f files.f -top TB -nologo -ssf TB.fsdb &
+file: 
+	find ../ -name "*.*v" > files.f
+
+clean:
+	rm -rf DVE* simv* *log ucli.key verdiLog urgReport csrc novas.* *.fsdb *.dat *.daidir *.vdb *~ vfastLog
+
diff --git a/sim/files.f b/sim/files.f
new file mode 100644
index 0000000..3666571
--- /dev/null
+++ b/sim/files.f
@@ -0,0 +1,20 @@
+../rtl/z_dsp/mult_C.v
+../rtl/z_dsp/mult_x.v
+../rtl/z_dsp/Trunc.v
+../rtl/z_dsp/TailCorr_top.v
+../rtl/z_dsp/IIR_top.v
+../rtl/z_dsp/diff_p.v
+../rtl/z_dsp/s2p_2.v
+../rtl/z_dsp/IIR_Filter_p8.v
+../rtl/z_dsp/IIR_Filter_p1.v
+../rtl/ref/mult_C.v
+../rtl/ref/FixRound.v
+../rtl/ref/TailCorr_top.v
+../rtl/ref/IIR_top.v
+../rtl/ref/diff_p.v
+../rtl/ref/s2p_2.v
+../rtl/ref/IIR_Filter_p8.v
+../rtl/model/DW02_mult.v
+
+tb_TailCorr_en.v
+