diff --git a/web-doc/_sidebar.md b/web-doc/_sidebar.md
index 7b7f82d..3224886 100644
--- a/web-doc/_sidebar.md
+++ b/web-doc/_sidebar.md
@@ -2,3 +2,4 @@
 - [GlusterFS](glusterfs.md "GlusterFS")
 - [OpenSSL](openssl.md "OpenSSL")
 - [Vitess](vitess.md "Vitess")
+- [Retro](retro-icc.md "Retro")
diff --git a/web-doc/retro-icc.md b/web-doc/retro-icc.md
new file mode 100644
index 0000000..a401c41
--- /dev/null
+++ b/web-doc/retro-icc.md
@@ -0,0 +1,20 @@
+# Intel C Code Builder For DOS
+
+If you have compiler installed under `C:\ICC`, set the following environment variables:
+
+```
+SET CBPATH=C:\ICC
+SET PATH=C:\ICC\BIN;%PATH%
+```
+
+If `icc` fails to find `C:\ICC\BIN\XMVM` and your system doesn't have the file, you can build your program with the `/xnovm` option.
+
+```
+icc /xnovm hello.c
+```
+
+Alternatively, you can extract the file from an existing ICC binary as shown in https://www.os2museum.com/wp/xmvm-surgery/ and place it under `C:\ICC\BIN`.
+
+```
+dd if=IC32.EXE of=XMVM skip=51385 bs=1 count=9440
+```