diff --git a/rpcsx-os/CMakeLists.txt b/rpcsx-os/CMakeLists.txt
index 32f9b3bfc..87f497f70 100644
--- a/rpcsx-os/CMakeLists.txt
+++ b/rpcsx-os/CMakeLists.txt
@@ -15,6 +15,7 @@ add_executable(rpcsx-os
   iodev/hmd_snsr.cpp
   iodev/null.cpp
   iodev/rng.cpp
+  iodev/sbl_srv.cpp
   iodev/shm.cpp
   iodev/zero.cpp
 
diff --git a/rpcsx-os/iodev/sbl_srv.cpp b/rpcsx-os/iodev/sbl_srv.cpp
new file mode 100644
index 000000000..8bdda8d3d
--- /dev/null
+++ b/rpcsx-os/iodev/sbl_srv.cpp
@@ -0,0 +1,57 @@
+#include "io-device.hpp"
+#include "orbis/KernelAllocator.hpp"
+#include "orbis/error/ErrorCode.hpp"
+#include "orbis/file.hpp"
+#include "orbis/thread/Thread.hpp"
+#include "orbis/utils/Logs.hpp"
+#include "orbis/utils/SharedMutex.hpp"
+#include "vm.hpp"
+#include <cstdio>
+
+struct SblSrvFile : public orbis::File {};
+
+struct SblSrvDevice : IoDevice {
+  orbis::shared_mutex mtx;
+  orbis::ErrorCode open(orbis::Ref<orbis::File> *file, const char *path,
+                        std::uint32_t flags, std::uint32_t mode,
+                        orbis::Thread *thread) override;
+};
+
+static orbis::ErrorCode sbl_srv_ioctl(orbis::File *file, std::uint64_t request,
+                                      void *argp, orbis::Thread *thread) {
+  ORBIS_LOG_FATAL("Unhandled sbl_srv ioctl", request);
+  thread->where();
+  return {};
+}
+
+static orbis::ErrorCode sbl_srv_mmap(orbis::File *file, void **address,
+                                     std::uint64_t size, std::int32_t prot,
+                                     std::int32_t flags, std::int64_t offset,
+                                     orbis::Thread *thread) {
+  ORBIS_LOG_FATAL("sbl_srv mmap", address, size, offset);
+  auto result = rx::vm::map(*address, size, prot, flags);
+
+  if (result == (void *)-1) {
+    return orbis::ErrorCode::INVAL; // TODO
+  }
+
+  *address = result;
+  return {};
+}
+
+static const orbis::FileOps ops = {
+    .ioctl = sbl_srv_ioctl,
+    .mmap = sbl_srv_mmap,
+};
+
+orbis::ErrorCode SblSrvDevice::open(orbis::Ref<orbis::File> *file,
+                                    const char *path, std::uint32_t flags,
+                                    std::uint32_t mode, orbis::Thread *thread) {
+  auto newFile = orbis::knew<SblSrvFile>();
+  newFile->device = this;
+  newFile->ops = &ops;
+  *file = newFile;
+  return {};
+}
+
+IoDevice *createSblSrvCharacterDevice() { return orbis::knew<SblSrvDevice>(); }
diff --git a/rpcsx-os/main.cpp b/rpcsx-os/main.cpp
index bb21bdb0a..d8128a81d 100644
--- a/rpcsx-os/main.cpp
+++ b/rpcsx-os/main.cpp
@@ -322,6 +322,7 @@ static int ps4Exec(orbis::Thread *mainThread,
   rx::vfs::mount("/dev/hid", createHidCharacterDevice());
   rx::vfs::mount("/dev/gc", createGcCharacterDevice());
   rx::vfs::mount("/dev/rng", createRngCharacterDevice());
+  rx::vfs::mount("/dev/sbl_srv", createSblSrvCharacterDevice());
   rx::vfs::mount("/dev/ajm", createAjmCharacterDevice());
 
   orbis::Ref<orbis::File> stdinFile;