diff --git a/lib/JBUS/memory/ghdl/.gitignore.templ b/lib/JBUS/memory/ghdl/.gitignore.templ
new file mode 100644
index 0000000..907336a
--- /dev/null
+++ b/lib/JBUS/memory/ghdl/.gitignore.templ
@@ -0,0 +1,4 @@
+.gitignore
+build/
+.gitignore
+build/
diff --git a/lib/JBUS/memory/ghdl/tb_ram_wb.make b/lib/JBUS/memory/ghdl/tb_ram_wb.make
index 6f33895..e0d7d96 100644
--- a/lib/JBUS/memory/ghdl/tb_ram_wb.make
+++ b/lib/JBUS/memory/ghdl/tb_ram_wb.make
@@ -11,5 +11,6 @@ SRCS += $(MOD_PATH)/src/tb_ram_wb.vhd
 TARGET := tb_ram_wb
 ENTITY := tb_ram_wb
 RUN_TIME := 1500ns
+WAVE_FORMAT := vcd
 
 include $(VHDL_HOME)/make/ghdl.mk
diff --git a/lib/JBUS/memory/ghdl/tb_rom_wb.make b/lib/JBUS/memory/ghdl/tb_rom_wb.make
index 1a2d61f..aea6656 100644
--- a/lib/JBUS/memory/ghdl/tb_rom_wb.make
+++ b/lib/JBUS/memory/ghdl/tb_rom_wb.make
@@ -10,6 +10,7 @@ SRCS += $(MOD_PATH)/src/tb_rom_wb.vhd
 TARGET := tb_rom_wb
 ENTITY := tb_rom_wb
 RUN_TIME := 1500ns
+WAVE_FORMAT := vcd
 
 include $(VHDL_HOME)/make/ghdl.mk