diff --git a/.gitmodules b/.gitmodules
index 0a0a7e3..da7e628 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,6 @@
 [submodule "hw/efinix_fpga/simulation/src/verilog-6502"]
 	path = hw/efinix_fpga/simulation/src/verilog-6502
 	url = https://git.byronlathi.com/bslathi19/verilog-6502
+[submodule "hw/efinix_fpga/simulation/src/verilog-sd-emulator"]
+	path = hw/efinix_fpga/simulation/src/verilog-sd-emulator
+	url = https://git.byronlathi.com/bslathi19/verilog-sd-emulator
diff --git a/hw/efinix_fpga/simulation/src/verilog-sd-emulator b/hw/efinix_fpga/simulation/src/verilog-sd-emulator
new file mode 160000
index 0000000..7fb88c9
--- /dev/null
+++ b/hw/efinix_fpga/simulation/src/verilog-sd-emulator
@@ -0,0 +1 @@
+Subproject commit 7fb88c9ee1ca65dd5bfd10b2e0f6331e958abdd7