diff --git a/.gitignore b/.gitignore
index d6f091b..d9e5a24 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
 build-fat/
 build-m68k/
 build-ppc/
+build/
+.vscode/
diff --git a/.gitmodules b/.gitmodules
index c01ecca..f70a63b 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,6 @@
 [submodule "opentransport-mbedtls"]
 	path = opentransport-mbedtls
 	url = git@github.com:cy384/opentransport-mbedtls.git
+[submodule "libvterm"]
+	path = libvterm
+	url = git@github.com:cy384/cy384/libvterm
diff --git a/CMakeLists.txt b/CMakeLists.txt
index fa370cf..ec43b38 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,7 +10,7 @@ add_application(ssheven CREATOR "SSH7" ssheven.c ssheven-console.c ssheven.r ssh
 
 # set up and build mbedtls
 set(ENABLE_PROGRAMS OFF CACHE BOOL "disable mbedtls programs" FORCE)
-set(UNSAFE_BUILD ON CACHE BOOL "ignore mac os jank fro mbedtls" FORCE)
+set(UNSAFE_BUILD ON CACHE BOOL "ignore mac os jank for mbedtls" FORCE)
 set(ENABLE_TESTING OFF CACHE BOOL "disable mbedtls tests" FORCE)
 add_subdirectory(opentransport-mbedtls)
 
@@ -21,6 +21,9 @@ set(BUILD_EXAMPLES OFF CACHE BOOL "disable libssh2 examples" FORCE)
 set(BUILD_TESTING OFF CACHE BOOL "disable libssh2 tests" FORCE)
 add_subdirectory(opentransport-libssh2)
 
+# set up and build libvterm
+add_subdirectory(libvterm)
+
 IF(CMAKE_SYSTEM_NAME MATCHES Retro68)
 # for 68k
   set_target_properties(ssheven PROPERTIES COMPILE_FLAGS "-ffunction-sections -mcpu=68020 -O3 -Wall -Wextra -Wno-unused-parameter")
@@ -30,5 +33,5 @@ ELSE()
 # for PPC
   set_target_properties(ssheven PROPERTIES COMPILE_FLAGS "-ffunction-sections -mcpu=601 -O3 -Wall -Wextra -Wno-unused-parameter")
   set_target_properties(ssheven PROPERTIES LINK_FLAGS "-Wl,-gc-sections")
-  target_link_libraries(ssheven ThreadsLib ssh2 mbedtls mbedx509 mbedcrypto OpenTransportAppPPC OpenTransportLib OpenTptInternetLib vterm retrocrt)
+  target_link_libraries(ssheven ThreadsLib libssh2 mbedtls mbedx509 mbedcrypto OpenTransportAppPPC OpenTransportLib OpenTptInternetLib vterm retrocrt)
 ENDIF()
diff --git a/libvterm b/libvterm
new file mode 160000
index 0000000..de55f41
--- /dev/null
+++ b/libvterm
@@ -0,0 +1 @@
+Subproject commit de55f41bbafa75be1050ccf002f7218a4e1b8dd0