update readme

README.md

@@ -1,3 +1,26 @@
 # ryzen-smu-cli
 
-A CLI tool for the ZenStates SMU library.
+A CLI tool for the ZenStates SMU library. See [ZenStates-Core](https://github.com/irusanov/ZenStates-Core) for compatibility.
+
+All credit to [ZenStates-Core](https://github.com/irusanov/ZenStates-Core) for core functionality and [SMUDebugTool](https://github.com/irusanov/SMUDebugTool) for usage examples.
+
+Usage:
+```
+.\ryzen-smu-cli.exe --help
+Description:
+  A CLI for the Ryzen SMU.
+
+Usage:
+  ryzen-smu-cli [options]
+
+Options:
+  --offset <offset>                Specify a zero-indexed core, or list of cores, and their PBO offset(s), in a fashion
+                                   similar to taskset. e.g. 0:-10,1:5,2:-20,14:-25
+  --disable-cores <disable-cores>  Specify a zero-indexed list of cores to disable. e.g. 0,1,4,7,12,15. This setting
+                                   does not take into account any current core disablement. All cores you wish to
+                                   disable must be specified. Any that are unspecified will be enabled. This option
+                                   requires a reboot.
+  --enable-all-cores               Enable all cores.
+  --version                        Show version information
+  -?, -h, --help                   Show help and usage information
+```