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Fixed CMP fail on Rob Finch's test suite. Closes #8.

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This commit is contained in:
Mike Naberezny 2009-08-16 22:53:00 -07:00
parent a0fb849524
commit 584c76e6e8
2 changed files with 4 additions and 2 deletions
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3
CHANGES.txt
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@ -16,6 +16,9 @@ Next Release
- The processor status register is now initialized to 0 on reset.
Previously, its unused bit (bit 5) was set to 1 on reset.
- Applied patch from Ed Spittles to change the CMP algorithm so that
it no longer fails Rob Finch's test suite. Closes #8.
0.6 (2009-08-11)
- Added monitor shortcut "a" for "assemble".

3
src/py65/devices/mpu6502.py
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@ -356,8 +356,7 @@ class MPU:
self.flags |= self.CARRY + self.ZERO
elif register_value > tbyte:
self.flags |= self.CARRY
else:
self.flags |= self.NEGATIVE
self.flags |= (self.a - tbyte) & self.NEGATIVE
def opSBC(self, x):
data = self.ByteAt(x())