finished refactor of emulator - started on loader (needs significant changes before functional in the way that I would like)

common/src/instructions.rs

@@ -3,6 +3,8 @@ use crate::{instructions::encode::Encode, prelude::*};
 #[derive(Copy, Clone, Debug, PartialEq, Eq)]
 pub enum Interrupt {
     Software(u8),
+    Breakpoint,
+    HardFault,
 }
 
 pub type Address = u32;
@@ -10,6 +12,8 @@ pub type Address = u32;
 impl Interrupt {
     const fn as_u8(self) -> u8 {
         match self {
+            Self::Breakpoint => 0,
+            Self::HardFault => 1,
             Self::Software(code) => code,
         }
     }
@@ -19,10 +23,11 @@ impl Interrupt {
 impl From<u8> for Interrupt {
     #[allow(unreachable_code)]
     fn from(code: u8) -> Self {
-        return Self::Software(code);
-        todo!("Implement this once a hardware interrupt convention is established.");
-
-        // Self::Software(_code)
+        match code {
+            0 => Self::Breakpoint,
+            1 => Self::HardFault,
+            _ => Self::Software(code),
+        }
     }
 }
 
@@ -73,7 +78,8 @@ pub enum Register {
 }
 
 impl Register {
-    #[must_use]
+    // this is here so clippy shuts up about the must_use tag.
+    #[allow(clippy::must_use_candidate)]
     pub fn general() -> Vec<Self> {
         vec![
             Self::Rg0,