diff --git a/src/core.rs b/src/core.rs
index 350db31..16405c5 100644
--- a/src/core.rs
+++ b/src/core.rs
@@ -49,12 +49,13 @@ impl Core {
                 Ok(i) => i,
                 Err(_) => {
                     eprintln!("Memory access fault while fetching instruction");
+                    eprintln!("PC: {:x}", self.pc);
                     break;
                 }
             };
 
             if instr == 0 {
-                eprintln!("Executing 0 instruction at {:X}", self.pc);
+                eprintln!("Executing 0 instruction at {:x}", self.pc);
                 break;
             }
 
@@ -69,7 +70,7 @@ impl Core {
                     InstructionResult::Normal => {}
                     InstructionResult::Exception(_e) => {
                         eprintln!("Exception from instruction");
-                        eprintln!("PC: {:016X}, instr: {:08X}", self.pc, instr.0);
+                        eprintln!("PC: {:016x}, instr: {:08x}", self.pc, instr.0);
                         break;
                     }
                     InstructionResult::Pause => {