diff --git a/vim/.vim/ftdetect/bin.vim b/vim/.vim/ftdetect/bin.vim
new file mode 100644
index 0000000..910744b
--- /dev/null
+++ b/vim/.vim/ftdetect/bin.vim
@@ -0,0 +1,11 @@
+" vim -b : edit binary using xxd-format!
+augroup Binary
+  au!
+  au BufReadPre  *.bin let &bin=1
+  au BufReadPost *.bin if &bin | silent %!xxd
+  au BufReadPost *.bin set ft=xxd | endif
+  au BufWritePre *.bin if &bin | silent %!xxd -r
+  au BufWritePre *.bin endif
+  au BufWritePost *.bin if &bin | silent %!xxd
+  au BufWritePost *.bin set nomod | endif
+augroup END