init

src/emu.rs

@@ -0,0 +1,41 @@
+use aligned_vec::{AVec, ConstAlign};
+
+use crate::PAGE_SIZE;
+
+pub struct Memory {
+    pub mem: AVec<u8, ConstAlign<PAGE_SIZE>>,
+}
+
+impl Memory {
+    fn load_u32(&self, addr: u32) -> Result<u32, ()> {
+        Ok(u32::from_le_bytes(
+            self.mem
+                .get((addr as usize)..)
+                .ok_or(())?
+                .get(..4)
+                .ok_or(())?
+                .try_into()
+                .unwrap(),
+        ))
+    }
+}
+
+pub struct Emulator {
+    pub mem: Memory,
+    pub xreg: [u32; 32],
+    pub pc: u32,
+}
+
+impl Emulator {
+    pub fn execute(&mut self) -> Result<(), ()> {
+        loop {
+            self.step();
+        }
+    }
+
+    fn step(&mut self) -> Result<(), ()> {
+        let instruction = self.mem.load_u32(self.pc)?;
+
+        todo!()
+    }
+}