From 7510ad13cd802a501072d9f13f21ee178522d231 Mon Sep 17 00:00:00 2001
From: Alex Janka <alex@alexjanka.com>
Date: Fri, 20 Jan 2023 14:59:17 +1100
Subject: [PATCH] prevent panic on overflow when incrementing program counter

---
 src/processor.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/processor.rs b/src/processor.rs
index 1404443..25cdb31 100644
--- a/src/processor.rs
+++ b/src/processor.rs
@@ -1213,7 +1213,7 @@ impl CPU {
     fn next_opcode(&mut self) -> u8 {
         unsafe {
             let opcode = self.memory.get(self.state.pc.as_u16);
-            self.state.pc.as_u16 += 0x1;
+            self.state.pc.as_u16 = self.state.pc.as_u16.wrapping_add(0x1);
             return opcode;
         };
     }