diff --git a/cardputer-bsc/src/keyboard.rs b/cardputer-bsc/src/keyboard.rs
index 42c4a42..63a71b1 100644
--- a/cardputer-bsc/src/keyboard.rs
+++ b/cardputer-bsc/src/keyboard.rs
@@ -38,10 +38,7 @@
 // SOFTWARE.
 
 use esp_idf_hal::{
-    gpio::{
-        Gpio11, Gpio13, Gpio15, Gpio3, Gpio4, Gpio5, Gpio6, Gpio7, Gpio8, Gpio9, Input,
-        InputOutput, Level, Output, PinDriver,
-    },
+    gpio::{Gpio11, Gpio13, Gpio15, Gpio3, Gpio4, Gpio5, Gpio6, Gpio7, Gpio8, Gpio9, Input, InputOutput, Level, Output, PinDriver},
     peripheral::Peripheral,
 };
 use esp_idf_sys::EspError;
@@ -107,112 +104,6 @@ pub enum KeyImprint {
     Space,
 }
 
-impl KeyImprint {
-    fn from_packed_address(i: usize, j: usize) -> Self {
-        match (i,j) {
-            (0, 0) => KeyImprint::Backquote,
-            (0, 1) => KeyImprint::Two,
-            (0, 2) => KeyImprint::Four,
-            (0, 3) => KeyImprint::Six,
-            (0, 4) => KeyImprint::Eight,
-            (0, 5) => KeyImprint::Zero,
-            (0, 6) => KeyImprint::Equal,
-            
-            (1, 0) => KeyImprint::Tab,
-            (1, 1) => KeyImprint::W,
-            (1, 2) => KeyImprint::R,
-            (1, 3) => KeyImprint::Y,
-            (1, 4) => KeyImprint::I,
-            (1, 5) => KeyImprint::P,
-            (1, 6) => KeyImprint::CloseSquareBracket,
-
-            (2, 0) => KeyImprint::LeftFn,
-            (2, 1) => KeyImprint::A,
-            (2, 2) => KeyImprint::D,
-            (2, 3) => KeyImprint::G,
-            (2, 4) => KeyImprint::J,
-            (2, 5) => KeyImprint::L,
-            (2, 6) => KeyImprint::Quote,
-
-            (3, 0) => KeyImprint::LeftCtrl,
-            (3, 1) => KeyImprint::LeftAlt,
-            (3, 2) => KeyImprint::X,
-            (3, 3) => KeyImprint::V,
-            (3, 4) => KeyImprint::N,
-            (3, 5) => KeyImprint::Comma,
-            (3, 6) => KeyImprint::Slash,
-
-            (4, 0) => KeyImprint::One,
-            (4, 1) => KeyImprint::Three,
-            (4, 2) => KeyImprint::Five,
-            (4, 3) => KeyImprint::Seven,
-            (4, 4) => KeyImprint::Nine,
-            (4, 5) => KeyImprint::Minus,
-            (4, 6) => KeyImprint::Backspace,
-
-            (5, 0) => KeyImprint::Q,
-            (5, 1) => KeyImprint::E,
-            (5, 2) => KeyImprint::T,
-            (5, 3) => KeyImprint::U,
-            (5, 4) => KeyImprint::O,
-            (5, 5) => KeyImprint::OpenSquareBracket,
-            (5, 6) => KeyImprint::Backslash,
-
-            (6, 0) => KeyImprint::LeftShift,
-            (6, 1) => KeyImprint::S,
-            (6, 2) => KeyImprint::F,
-            (6, 3) => KeyImprint::H,
-            (6, 4) => KeyImprint::K,
-            (6, 5) => KeyImprint::SemiColon,
-            (6, 6) => KeyImprint::Enter,
-
-            (7, 0) => KeyImprint::LeftOpt,
-            (7, 1) => KeyImprint::Z,
-            (7, 2) => KeyImprint::C,
-            (7, 3) => KeyImprint::B,
-            (7, 4) => KeyImprint::M,
-            (7, 5) => KeyImprint::Period,
-            (7, 6) => KeyImprint::Space,
-
-            _ => unreachable!()
-        }
-    }
-}
-
-struct FullKeyboardState {
-    packed_state: [u8; 7],
-}
-
-enum KeyAction {
-    Pressed,
-    Released,
-}
-
-impl FullKeyboardState {
-    fn changes<'a>(&'a self, old: &'a Self) -> impl Iterator<Item = (KeyImprint, KeyAction)> + 'a {
-        self.packed_state
-            .iter()
-            .zip(old.packed_state.iter())
-            .enumerate()
-            .flat_map(|(i, (new, old))| {
-                let diff = new ^ old; // XOR to find what changed
-                (0..8).filter_map(move |j| {
-                    if (1 << j) & diff != 0 {
-                        let key = KeyImprint::from_packed_address(i, j);
-                        let action = if (1 << j) & new == 0 {
-                            KeyAction::Released
-                        } else {
-                            KeyAction::Pressed
-                        };
-                        Some((key, action))
-                    } else {
-                        None
-                    }
-                })
-            })
-    }
-}
-
 #[derive(Debug, Clone, Copy, PartialEq)]
 pub enum Modified {
     Graph(char),