diff --git a/docs/library/mu.md b/docs/library/mu.md
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+# Palm OS (Mu)
+
+## Background
+
+Mu is the first Palm OS emulator capable of actually playing Palm games. It is currently capable of playing most 160×160 Palm OS 4 software perfectly. There are a few hardware abstraction glitches and sound FIFO inaccuracies but other than that the device works and the audio plays normally, with no hacks done to the OS.
+
+The Mu core has been authored by:
+
+- guicrith / meepingsnesroms; Stephanie Gawroriski (Xer Shadow Tail)
+
+The Mu core is licensed under:
+
+- [CC BY-NC 3.0 US (Non-commercial)](http://creativecommons.org/licenses/by-nc/3.0/us/)
+
+A summary of the licenses behind RetroArch and its cores can be found [here](../development/licenses.md).
+
+## BIOS
+
+[Required or optional firmware files](https://docs.libretro.com/library/bios/) go in the frontend's system directory:
+
+| Filename          | Description                     | md5sum                           |
+|:-----------------:|:-------------------------------:|:--------------------------------:|
+| `palmos40-en-m500.rom` | Palm OS 4.0 for m500 | `f50e4d5e4d98dc831f2c34a9107651eb` |
+| `palmos41-en-m515.rom` | Palm OS 4.1 for m515 | `83cb1d1c76e568b916dc2e7c0bf669f6` |
+| `palmos52-en-t3.rom` | Palm OS 5.2 for Tungsten T3 | `de46ec84d9aabf655eabdf9b00a3845d` |
+| `bootloader-dbvz.rom` | | `9da101cd2317830649a31f8fa46debec` |
+
+The BIOS file corresponding to the selected model is required, default is the m515.
+
+## Extensions
+
+Content that can be loaded by the Mu core have the following file extensions:
+
+- `.prc`, `.pqa`, `.pdb`
+- `.zip`
+- `.img` - image file for the MMC card
+
+RetroArch database(s) that are associated with the Mu core: none yet.
+
+## Features
+
+Frontend-level settings or features that the Mu core respects:
+
+| Feature           | Supported |
+|-------------------|:---------:|
+| Restart           | ✔         |
+| Saves             | ✕         |
+| States            | ✔         |
+| Rewind            | -         |
+| Netplay           | -         |
+| Core Options      | ✔         |
+| RetroAchievements | ✕         |
+| RetroArch Cheats  | ✕         |
+| Native Cheats     | ✕         |
+| Controls          | -         |
+| Remapping         | ✔         |
+| Multi-Mouse       | ✕         |
+| Rumble            | ✕         |
+| Sensors           | ✕         |
+| Camera            | ✕         |
+| Location          | ✕         |
+| Subsystem         | ✕         |
+| [Softpatching](../guides/softpatching.md) | ✕         |
+| Disk Control      | ✕         |
+| Username          | ✕         |
+| Language          | ✕         |
+| Crop Overscan     | ✕         |
+| LEDs              | ✔         |
+
+## Geometry and timing
+
+- The Mu core's core provided FPS is 60
+- The Mu core's core provided sample rate is 48000
+- The Mu core's base width is 160
+- The Mu core's base height is 220
+- The Mu core's max width is 320
+- The Mu core's max height is 480
+- The Mu core's core provided aspect ratio is 8:11
+
+## Core options
+
+The Mu core has the following option(s) that can be tweaked from the core options menu. The default setting is bolded.
+
+Core has to be closed for all settings to be applied on next launch.
+
+- CPU Speed (**1.0**|1.5|2.0|2.5|3.0|0.5)
+- Force Match System Clock (**disabled**|enabled)
+- Ignore Invalid Behavior (**disabled**|enabled)
+- Use Left Joystick As Mouse (**disabled**|enabled)
+- Disable Graffiti Area (**disabled**|enabled)
+- OS Version (**Palm m515/Palm OS 4.1**|Tungsten T3/Palm OS 5.2.1|Tungsten T3/Palm OS 6.0|Palm m500/Palm OS 4.0)
+
+## Joypad
+
+| RetroPad Inputs                                | Palm OS Inputs |
+|------------------------------------------------|----------------|
+| ![](../image/retropad/retro_b.png)             | To Do List     |
+| ![](../image/retropad/retro_y.png)             | Date Book      |
+| ![](../image/retropad/retro_select.png)        | D-Pad Center   |
+| ![](../image/retropad/retro_start.png)         | Power          |
+| ![](../image/retropad/retro_dpad_up.png)       | D-Pad Up       |
+| ![](../image/retropad/retro_dpad_down.png)     | D-Pad Down     |
+| ![](../image/retropad/retro_dpad_left.png)     | D-Pad Left (OS5 only)  |
+| ![](../image/retropad/retro_dpad_right.png)    | D-Pad Right (OS5 only) |
+| ![](../image/retropad/retro_a.png)             | Note Pad       |
+| ![](../image/retropad/retro_x.png)             | Address Book   |
+| ![](../image/retropad/retro_r1.png)            | Touchscreen click/tap  |
+| ![](../image/retropad/retro_left_stick.png)    | Touchscreen movement   |
+
+## Pointer
+
+| RetroPointer Inputs                                                                                                      | Palm OS Inputs      |
+|--------------------------------------------------------------------------------------------------------------------------|---------------------------|
+| ![](../image/retromouse/retro_mouse.png) or ![](../image/Button_Pack/Gestures/Gesture_Finger_Front.png) Pointer Position | Touchscreen movement |
+| ![](../image/retromouse/retro_left.png) or ![](../image/Button_Pack/Gestures/Gesture_Tap.png) Pointer Pressed            | Touchscreen click/tap |
+
+## External Links
+
+- [Original Mu Website](https://meepingsnesroms.github.io/)
+- [Original Mu Repository](https://github.com/meepingsnesroms/Mu)
+- [Libretro Mu Core info file](https://github.com/libretro/Mu/blob/master/libretroBuildSystem/mu_libretro.info)
+- [Libretro Mu Repository](https://github.com/libretro/Mu)
+- [Report Libretro Mu Core Issues Here](https://github.com/libretro/Mu/issues)
diff --git a/mkdocs.yml b/mkdocs.yml
index c0467e4a5..fe9279619 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -217,6 +217,8 @@ nav:
         - 'NEC - PC Engine SuperGrafx (Beetle SGX)': 'library/beetle_sgx.md'
         - 'NEC - PC Engine / CD (Beetle PCE FAST)': 'library/beetle_pce_fast.md'
         - 'NEC - PC-FX (Beetle PC-FX)': 'library/beetle_pc_fx.md'
+      - 'Palm Emulation':
+        - 'Palm OS (Mu)': 'library/mu.md'
       - 'Philips Emulation':
         - 'Magnavox - Odyssey2 / Philips Videopac+ (O2EM)': 'library/o2em.md'
         - 'Philips - P2000T (M2000)': 'library/m2000.md'