diff --git a/.gitignore b/.gitignore
index 8981efca..d2c1b921 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,7 @@ src/-lstdc++.res
 # Neural network for the NNUE evaluation
 **/*.nnue
 
+# Cartesi binaries
+cartesi/img/stockfish
+cartesi/stockfish.ext2
+
diff --git a/README.md b/README.md
index 6ad35cf0..c14e5a11 100644
--- a/README.md
+++ b/README.md
@@ -20,14 +20,40 @@ riscv64-cartesi-linux-gnu-gcc
 # Build
 Note, the Makefile kludge disables things like "tests".
 
-Run:
+Run this to build stockfish binary for riscv64 using Cartesi GCC toolchain:
 
 ```
+cd src
 make -j build ARCH=riscv64 COMP=riscv64-cartesi-linux-gnu-gcc COMPCXX=riscv64-cartesi-linux-gnu-g++
 ```
 
+# Build Disk Images for Cartesi Emulator
+
+```
+# Go back to top level directory in this git repo:
+cd ..
+
+# Copy newly built stockfish for cartesi disk image:
+cp -p src/stockfish cartesi/img/stockfish
+
+# Make 64 megabyte ext2 disk image with stockfish and shell script
+genext2fs -b 65536 -d cartesi/img cartesi/stockfish.ext2
+```
+
 # Run Stockfish in Emulator
-TODO XXX
+To run the disk images, using upstream rootfs:
+
+```
+# XXX too much memory, but default 64 megs isn't enough.
+# Lower it & test.
+
+cartesi-machine								\
+	--ram-length=512Mi						\
+	--flash-drive=label:stockfish,filename:cartesi/stockfish.ext2	\
+	--flash-drive=label:root,filename:/opt/cartesi/share/images/rootfs.ext2	\
+	-- /mnt/stockfish/stockfish.sh
+
+```
 
 # Upstream
 See:
@@ -47,3 +73,10 @@ See:
 
 # Copying
 Same as upstream Stockfish, GPL v3.
+
+# Contact
+```
+# y@deepcrayon.fish or jebba in Cartesi/Stockfish discord
+
+```
+
diff --git a/cartesi/img/stockfish.sh b/cartesi/img/stockfish.sh
new file mode 100755
index 00000000..05109800
--- /dev/null
+++ b/cartesi/img/stockfish.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+echo
+echo "Stockfish running under Cartesi virtual machine"
+echo
+
+echo uci | /mnt/stockfish/stockfish
+
+exit
+