added zero_page_y_mode

2011-08-06 18:09:37 -04:00 · 2011-08-06 18:09:37 -04:00 · 28fcca6bde
parent 3344005fe7
commit 28fcca6bde
1 changed files with 3 additions and 0 deletions
--- a/applepy.py
+++ b/applepy.py
@ -330,6 +330,9 @@ class CPU:
    def zero_page_x_mode(self):
        return (self.zero_page_mode() + signed(self.x_index)) % 0x100
    
+    def zero_page_y_mode(self):
+        return (self.zero_page_mode() + signed(self.y_index)) % 0x100
+    
    def indirect_mode(self):
        return self.memory.read_word(self.absolute_mode())