From 3a20c009d9c552272f27f4cdac1f5b73e94c85e6 Mon Sep 17 00:00:00 2001
From: James Tauber <jtauber@jtauber.com>
Date: Sat, 6 Aug 2011 22:05:15 -0400
Subject: [PATCH] little BIT of simplication

---
 applepy.py | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/applepy.py b/applepy.py
index c5bb03e..b7e37d4 100644
--- a/applepy.py
+++ b/applepy.py
@@ -607,12 +607,9 @@ class CPU:
     
     def BIT(self, operand_address):
         value = self.memory.read_byte(operand_address)
-        if value > 0x7F:
-            self.sign_flag = 1
-        else:
-            self.sign_flag = 0
+        self.sign_flag = ((value >> 7) % 2) # bit 7
         self.overflow_flag = ((value >> 6) % 2) # bit 6
-        self.zero_flag = ((self.accumulator & value) == 0) # @@@ is this right?
+        self.zero_flag = ((self.accumulator & value) == 0)
     
     # COMPARISON