From 6525a27511413b4029d8e02178a124f6eee07228 Mon Sep 17 00:00:00 2001 From: James Tauber Date: Sun, 7 Aug 2011 06:42:47 -0400 Subject: [PATCH] don't treat indices as signed in indexed addressing modes (ht: ghewgill) --- applepy.py | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/applepy.py b/applepy.py index 69653fc..cda860f 100644 --- a/applepy.py +++ b/applepy.py @@ -631,28 +631,28 @@ class CPU: return self.read_pc_word() def absolute_x_mode(self): - return self.absolute_mode() + signed(self.x_index) + return self.absolute_mode() + self.x_index def absolute_y_mode(self): - return self.absolute_mode() + signed(self.y_index) + return self.absolute_mode() + self.y_index def zero_page_mode(self): return self.read_pc_byte() def zero_page_x_mode(self): - return (self.zero_page_mode() + signed(self.x_index)) % 0x100 + return (self.zero_page_mode() + self.x_index) % 0x100 def zero_page_y_mode(self): - return (self.zero_page_mode() + signed(self.y_index)) % 0x100 + return (self.zero_page_mode() + self.y_index) % 0x100 def indirect_mode(self): return self.memory.read_word_bug(self.absolute_mode()) def indirect_x_mode(self): - return self.memory.read_word_bug((self.read_pc_byte() + signed(self.x_index)) % 0x100) + return self.memory.read_word_bug((self.read_pc_byte() + self.x_index) % 0x100) def indirect_y_mode(self): - return self.memory.read_word_bug(self.read_pc_byte()) + signed(self.y_index) + return self.memory.read_word_bug(self.read_pc_byte()) + self.y_index def relative_mode(self): pc = self.get_pc()