diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 0000000..003b4ac
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,48 @@
+name: main
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: Swatinem/rust-cache@v2
+    - name: Version
+      run: rustc --version
+    - name: Build
+      run: cargo rustc --verbose -- -D warnings
+
+
+  clippy:
+      runs-on: ubuntu-latest
+      steps:
+        - uses: actions/checkout@v4
+        - uses: Swatinem/rust-cache@v2
+        - name : Clippy
+          run: cargo clippy --all-features -- -D warnings
+
+
+  format-check:
+      runs-on: ubuntu-latest
+      steps:
+        - uses: actions/checkout@v4
+        - name: Run rustfmt
+          run: cargo fmt
+
+
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: Swatinem/rust-cache@v2
+    - name: Unit tests
+      run: cargo test
diff --git a/README.md b/README.md
index ca3ecc4..c9b53b6 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,12 @@
 # supposedly some ~~forth implementation~~ gameboy color emulator
 
+
+## Links
+
+### gameboy
+* https://www.copetti.org/writings/consoles/game-boy/
+* https://www.pastraiser.com/cpu/gameboy/gameboy_opcodes.html
+* https://gbdev.io/pandocs/
+* https://rylev.github.io/DMG-01/public/book/cpu/introduction.html
+* http://z80.info/decoding.htm
+
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 0000000..778ebb7
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,4 @@
+[toolchain]
+channel = "1.72.1"
+components = [ "rustfmt", "rustc-dev" , "clippy"]
+profile = "minimal"