diff --git a/src/simulator/machine.rs b/src/simulator/machine.rs
index 710b11a..462c775 100644
--- a/src/simulator/machine.rs
+++ b/src/simulator/machine.rs
@@ -6,6 +6,29 @@ use super::{decode::{Instruction, decode}, interrupt::Interrupt};
 use super::global::*;
 use std::fs::File;
 
+
+/*
+*  Decommenter la variant si il est utilisé quelque part
+ */
+enum ExceptionType {
+	NO_EXCEPTION,//Everything ok!
+	//SYSCALL_EXCEPTION,//A program executed a system call.
+	PAGEFAULT_EXCEPTION,//Page fault exception
+	READONLY_EXCEPTION,//Write attempted to a page marked "read-only" */
+	//BUSERROR_EXCEPTION,     
+	/* translation resulted
+	in an invalid physical
+	address (mis-aligned or
+	out-of-bounds) */
+	ADDRESSERROR_EXCEPTION, /* Reference that was
+				  not mapped in the address
+				  space */
+	//OVERFLOW_EXCEPTION,     //Integer overflow in add or sub.
+	//ILLEGALINSTR_EXCEPTION, //Unimplemented or reserved instr.
+	//NUM_EXCEPTION_TYPES
+}
+
+
 pub const STACK_REG: usize = 2;
 
 pub const NUM_INT_REGS: usize = 32;