diff --git a/README.md b/README.md
index 4183c77d72..64dd7f918d 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ Important note - we now use submodules:
 `git submodule update --init`
 
 # What do we have here?
- * [Firmware](/firmware) Source code for open source engine control unit for stm32 chips
+ * [Firmware](/firmware) Source code for open source engine control unit for stm32 chips incuding [implementation overview](https://github.com/rusefi/rusefi/blob/master/firmware/readme.md)
  * [Hardware](/hardware) KiCAD files for our older PCBs
  * [rusEFI console](/java_console) rusEFI own naive tuning software
  * [Simulator](/simulator) win32 or posix version of firmware allows to explore without any hardware