diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f66e279..c9d0041 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -59,7 +59,7 @@ build sim:
   script:  
     - source init_env.sh
     - cd hw/efinix_fpga/simulation
-    - make
+    - make sim_top
   dependencies:
     - build toolchain
 
@@ -93,6 +93,6 @@ run sim:
   script:
     - source init_env.sh
     - cd hw/efinix_fpga/simulation
-    - vvp sim_top
+    - make sim
   dependencies:
     - build sim
diff --git a/hw/efinix_fpga/simulation/Makefile b/hw/efinix_fpga/simulation/Makefile
index ee67cae..a0bb1eb 100644
--- a/hw/efinix_fpga/simulation/Makefile
+++ b/hw/efinix_fpga/simulation/Makefile
@@ -16,7 +16,13 @@ TARGET=sim_top
 INIT_MEM=init_hex.mem
 FLAGS=-DSIM -DRTL_SIM
 
-all: $(INIT_MEM)
+all: sim
+
+.PHONY: sim
+sim: $(TARGET)
+	vvp $(TARGET) -fst
+
+$(TARGET): $(INIT_MEM) $(SRCS)
 	iverilog -g2005-sv $(FLAGS) -s $(TOP_MODULE) -o $(TARGET) $(INC) $(SRCS)
 
 $(INIT_MEM):
diff --git a/hw/efinix_fpga/simulation/src/sim_top.sv b/hw/efinix_fpga/simulation/src/sim_top.sv
index 227ae42..f5cafb0 100644
--- a/hw/efinix_fpga/simulation/src/sim_top.sv
+++ b/hw/efinix_fpga/simulation/src/sim_top.sv
@@ -49,7 +49,7 @@ initial begin
     button_reset <= '0;
     repeat(10) @(r_clk_2);
     button_reset <= '1;
-    repeat(20000) @(r_clk_2);
+    repeat(50000) @(r_clk_2);
     $finish();
 end
 
@@ -82,6 +82,18 @@ sim_uart u_sim_uart(
     .tx_o(w_dut_uart_rx)
 );
 
+logic w_sd_cs;
+logic w_spi_clk;
+logic w_spi_mosi;
+logic w_spi_miso;
+
+sd_card_emu u_sd_card_emu(
+    .clk(w_spi_clk),
+    .cs(w_sd_cs),
+    .mosi(w_spi_mosi),
+    .miso(w_spi_miso)
+);
+
 
 super6502 u_dut(
     .i_sysclk(r_sysclk),
@@ -101,6 +113,11 @@ super6502 u_dut(
     .uart_rx(w_dut_uart_rx),
     .uart_tx(w_dut_uart_tx),
 
+    .sd_cs(w_sd_cs),
+    .spi_clk(w_spi_clk),
+    .spi_mosi(w_spi_mosi),
+    .spi_miso(w_spi_miso),
+
     .o_sdr_CKE(w_sdr_CKE),
     .o_sdr_n_CS(w_sdr_n_CS),
     .o_sdr_n_WE(w_sdr_n_WE),
diff --git a/hw/efinix_fpga/simulation/src/verilog-sd-emulator b/hw/efinix_fpga/simulation/src/verilog-sd-emulator
index 7fb88c9..a378570 160000
--- a/hw/efinix_fpga/simulation/src/verilog-sd-emulator
+++ b/hw/efinix_fpga/simulation/src/verilog-sd-emulator
@@ -1 +1 @@
-Subproject commit 7fb88c9ee1ca65dd5bfd10b2e0f6331e958abdd7
+Subproject commit a37857045c3c070833f2409f1eda81a2af1c6800