diff --git a/lib/emac/ghdl/tb_emac_top_jb.gtkw b/lib/emac/ghdl/tb_emac_top_jb.gtkw
new file mode 100644
index 0000000..eaae84b
--- /dev/null
+++ b/lib/emac/ghdl/tb_emac_top_jb.gtkw
@@ -0,0 +1,43 @@
+[*]
+[*] GTKWave Analyzer v3.3.104 (w)1999-2020 BSI
+[*] Tue Mar 23 09:14:12 2021
+[*]
+[dumpfile] "/home/jens/work/vhdl/trunk/lib/emac/ghdl/build/tb_emac_top_jb/tb_emac_top_jb.vcd"
+[dumpfile_mtime] "Tue Mar 23 09:11:04 2021"
+[dumpfile_size] 94821788
+[savefile] "/home/jens/work/vhdl/trunk/lib/emac/ghdl/build/tb_emac_top_jb/tb_emac_top_jb.gtkw"
+[timestart] 0
+[size] 1856 1136
+[pos] -2 -2
+*-38.095482 916000000000 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
+[sst_width] 233
+[signals_width] 211
+[sst_expanded] 1
+[sst_vpaned_height] 331
+@28
+tb_emac_top_jb.clk
+tb_emac_top_jb.rst
+@22
+tb_emac_top_jb.dat_i[31:0]
+tb_emac_top_jb.dat_o[31:0]
+@28
+tb_emac_top_jb.mii_rx_clk
+tb_emac_top_jb.mii_rx_dv
+tb_emac_top_jb.mii_rx_er
+@22
+tb_emac_top_jb.mii_tx[7:0]
+@28
+tb_emac_top_jb.mii_tx_clk
+tb_emac_top_jb.mii_tx_en
+tb_emac_top_jb.mii_tx_er
+tb_emac_top_jb.mii_col
+tb_emac_top_jb.mii_crs
+@22
+tb_emac_top_jb.status_reg[31:0]
+@420
+tb_emac_top_jb.pkt_count
+@28
+tb_emac_top_jb.pktgen_en
+tb_emac_top_jb.loop_back_en
+[pattern_trace] 1
+[pattern_trace] 0
diff --git a/lib/emac/ghdl/tb_emac_top_jb.make b/lib/emac/ghdl/tb_emac_top_jb.make
index ab32af4..e7d4b2e 100644
--- a/lib/emac/ghdl/tb_emac_top_jb.make
+++ b/lib/emac/ghdl/tb_emac_top_jb.make
@@ -25,7 +25,7 @@ SRCS += $(LIB_PATH)/emac/src/tb_emac_top_jb.vhd
 TARGET := tb_emac_top_jb
 ENTITY := tb_emac_top_jb
 WITH_VCD := y
-RUN_TIME := 50000us
+RUN_TIME := 2000us
 
 include $(ROOT_PATH)/Common/make/ghdl.mk