diff --git a/README.md b/README.md
index bd8d274..56c56fd 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,11 @@
 # calculator
-An OS for an STM32-based calculator
+An OS for an STM32-based calculator  
+  
+Trying to make an operating system for a calculator based on the STM32L476RG, using its associated Nucleo board. Starting from scratch because it's fun.  
+  
+Required packages:
+* arm-none-eabi toolchain
+* openocd
+* make
+  
+Use run.sh to upload the final output to the processor.