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+# MIPS support
+
+starboard/creator directory contains port of Cobalt for Creator CI20 platform:
+https://creatordev.io/ci20.html
+
+
+# Building Cobalt for CI20
+
+Cobalt can be built for CI20 using LLVM toolchain (Clang and lld),
+or GCC 4.9 toolchain. In both cases sysroot based on Debian Jessie is needed.
+
+## Sysroot
+
+Directory third_party/ci20 contains script mipsel-toolchain-sysroot-creator.sh,
+which will create Debian Jessie based sysroot. In addition this script will
+also build GCC toolchain.
+
+In order to create sysroot and toolchain run:
+
+    ./mipsel-toolchain-sysroot-creator.sh
+
+Result will be a package, mipsel_toolchain_sysroot.tgz, which will contain
+sysroot and GCC toolchain.
+
+Directory where this package is extracted should be exported as CI20_HOME.
+
+    export CI20_HOME=<PATH_TO_DIRECTORY_WHERE_PACKAGE_IS_EXTRACTED>
+
+## Building
+
+Follow all generic instructions from:
+
+    http://cobalt.foo/development/setup-linux.html
+
+### Building with Clang
+
+Clang is the default toolchain for building Cobalt for CI20.
+Configuration files are located in creator/ci20x11.
+
+Commands for building are:
+
+    cobalt/build/gyp_cobalt -C debug creator-ci20x11
+    ninja -j4 -C out/creator-ci20x11_debug all
+
+    cobalt/build/gyp_cobalt -C devel creator-ci20x11
+    ninja -j4 -C out/creator-ci20x11_devel all
+
+    cobalt/build/gyp_cobalt -C qa creator-ci20x11
+    ninja -j4 -C out/creator-ci20x11_qa cobalt
+
+    cobalt/build/gyp_cobalt -C gold creator-ci20x11
+    ninja -j4 -C out/creator-ci20x11_gold cobalt
+
+### Building with GCC 4.9
+
+Configuration files for GCC build are located in creator/ci20x11/gcc/4.9
+
+Commands for building are:
+
+    cobalt/build/gyp_cobalt -C debug creator-ci20x11-gcc-4-9
+    ninja -j4 -C out/creator-ci20x11-gcc-4-9_debug all
+
+    cobalt/build/gyp_cobalt -C devel creator-ci20x11-gcc-4-9
+    ninja -j4 -C out/creator-ci20x11-gcc-4-9_devel all
+
+    cobalt/build/gyp_cobalt -C qa creator-ci20x11-gcc-4-9
+    ninja -j4 -C out/creator-ci20x11-gcc-4-9_qa cobalt
+
+    cobalt/build/gyp_cobalt -C gold creator-ci20x11-gcc-4-9
+    ninja -j4 -C out/creator-ci20x11-gcc-4-9_gold cobalt
+
+
+# Running Cobalt on CI20
+
+Cobalt might complain about missing libraries on CI20 platform with stock
+Debian rootfs.
+
+To check which libraries are missing, run:
+
+    ldd ./cobalt
+
+And install missing libraries using apt-get.
+
+## Pulseaudio
+
+Before running Cobalt on CI20, pulseaudio must be disabled.
+
+a) Global config (all users):
+edit /etc/pulse/client.conf
+or
+b) Local config (single user):
+edit ~/.config/pulse/client.conf
+
+Add following new line to client.conf:
+autospawn = no
+
+## Starting Cobalt
+
+To start Cobalt on CI20, mount "out" directory on platform and run:
+
+    cd out/creator-ci20x11_gold
+    ./cobalt
+
+By default Cobalt will open youtube.com/tv page.
+
+
+# Notes about performance
+
+## Audio
+
+With pulseaudio disabled, audio on youtube.com/tv is working OK,
+with occasional audible artifacts.
+
+## Video
+
+Since CI20 still uses software video decoding, video performance is not good.
+Video playback will start, but most of the frames will be dropped.