(BIG CHANGE) memory handling has changed, MMIO is now a 2 level page table, misaligned access supported, addresses not internally split to page and offset immediately, all load/store instructions implemented. Might still have bugs

src/core.rs

@@ -4,6 +4,8 @@
 // This file is part of TRVE (https://gitea.taitep.se/taitep/trve)
 // See LICENSE file in the project root for full license text.
 
+use std::fmt::format;
+
 use crate::{
     consts::{Addr, RegId, RegValue},
     decode::Instruction,
@@ -29,17 +31,15 @@ impl Core {
 
     pub fn run(&mut self) {
         loop {
-            let page = (self.pc / 4096) as usize;
-            let offset = (self.pc % 4096 / 4) as u16;
             if !self.pc.is_multiple_of(4) {
-                self.throw_exception(ExceptionType::InstructionAccessMisaligned);
+                self.throw_exception(ExceptionType::InstructionAddressMisaligned);
                 break;
             }
 
-            let instr = match self.mem.read_word(page, offset) {
+            let instr = match self.mem.read_word(self.pc) {
                 Ok(i) => i,
-                Err(_) => {
-                    self.throw_exception(ExceptionType::InstructionAccessFault);
+                Err(e) => {
+                    self.throw_exception(e.to_exception_instr());
                     break;
                 }
             };