Apple-2-Tools/applepy
1
0
Fork 0
mirror of https://github.com/jtauber/applepy.git synced 2024-11-27 07:51:10 +00:00
Code Issues Projects Releases Wiki Activity

little BIT of simplication

Browse Source
This commit is contained in:
James Tauber 2011-08-06 22:05:15 -04:00
parent c6a6071b2c
commit 3a20c009d9
1 changed files with 2 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
applepy.py
View File

@ -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