From e2d99bcca0fef1d35f33e5adc19627cfec45b511 Mon Sep 17 00:00:00 2001
From: Michael Specht <micha.specht@gmail.com>
Date: Thu, 15 Feb 2018 22:22:09 +0100
Subject: [PATCH] fixed a nasty bug (THE BUG)

---
 p65c02.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/p65c02.c b/p65c02.c
index 9288d08..b373dec 100644
--- a/p65c02.c
+++ b/p65c02.c
@@ -604,10 +604,10 @@ void handle_next_opcode()
             target_address = read16(rpc8());
             break;
         case zero_page_x:
-            target_address = (rpc8() + cpu.x) % 0xff;
+            target_address = (rpc8() + cpu.x) & 0xff;
             break;
         case zero_page_y:
-            target_address = (rpc8() + cpu.y) % 0xff;
+            target_address = (rpc8() + cpu.y) & 0xff;
             break;
         case absolute_x:
             target_address = rpc16();