Update README.md

Add some SMU registers explanation Update README.md Update README.md
irusanov · Aug 21, 2019 · 4f830b2 · 4f830b2
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 This project was originally created to enable simple P-state overclocking on ASUS AM4 motherboards from the OS. It's no longer maintained but may be freely used as a base or for parts for anyone interested in continuing this project.
 
 It was created using Visual Studio 2017 and requires the WinRing driver and library to run (https://1drv.ms/u/s!Atmpv-6qHr_6r-YV1-C0ht0nCQiHKA).
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+# SMU Commands
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+There's no public document describing the available commands, however I was able to guess some of them with trial and error and the help of the publicly released "worktool" app and the info provided by FlyGoat's repo: (https://github.com/FlyGoat/ryzen_nb_smu)
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+| ID | Name | Note |
+| :------| :------ | :------ |
+| 0x1 | TestMessage |  |
+| 0x2 | GetSmuVersion |  |
+| 0x24 | EnableOverclocking | Forces base clock and manual overclock mode. |
+| 0x25 | DisableOverclocking |  |
+| 0x26 | SetOverclockFreqAllCore | Sets all core frequency, EnableOverclocking first. |
+| 0x27 | SetOverclockFreqPerCore | Always sets core #0, probably needs additional parameters. EnableOverclocking first.  |
+| 0x28 | SetOverclockVid | Alters the VID (in HEX). EnableOverclocking first. |
+| 0x29 | SetBoostLimitFreqAllCores | Probably sets fmax |
+| 0x2B | ? | Sets maximum boost frequency |
+| 0x2C | GetOverclockCap | ? |
+| 0x2F | ? | With multi manually set to 40x, sets the multi to 39.50x |