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Fix Z flag handling for TSB and TRB. Closes #32

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This commit is contained in:
Mike Naberezny 2017-05-08 17:08:38 -07:00
parent 16d21704cc
commit 9d59f057d3
3 changed files with 13 additions and 10 deletions
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3
CHANGES.txt
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@ -9,6 +9,9 @@
allow the addresses of the ``getc`` and ``putc`` handlers to be
changed. Patch by Mario Keller.
- Fixed a 65C02 bug where the TSB and TRB instructions did not set
the Z flag correctly. Thanks to Kris Kennaway for reporting it.
0.24 (2015-03-31)
- Released as a universal wheel.

4
py65/devices/mpu65c02.py
View File

@ -50,7 +50,7 @@ class MPU(mpu6502.MPU):
m = self.memory[address]
self.p &= ~self.ZERO
z = m & self.a
if z != 0:
if z == 0:
self.p |= self.ZERO
self.memory[address] = m | self.a
@ -59,7 +59,7 @@ class MPU(mpu6502.MPU):
m = self.memory[address]
self.p &= ~self.ZERO
z = m & self.a
if z != 0:
if z == 0:
self.p |= self.ZERO
self.memory[address] = m & ~self.a

16
py65/tests/devices/test_mpu65c02.py
View File

@ -1227,7 +1227,7 @@ class MPUTests(unittest.TestCase, Common6502Tests):
self.assertEqual(0xE0, mpu.memory[0x00BB])
mpu.step()
self.assertEqual(0xF0, mpu.memory[0x00BB])
self.assertEqual(mpu.ZERO, mpu.p & mpu.ZERO)
self.assertEqual(0, mpu.p & mpu.ZERO)
self.assertEqual(0x0002, mpu.pc)
self.assertEqual(5, mpu.processorCycles)
@ -1240,7 +1240,7 @@ class MPUTests(unittest.TestCase, Common6502Tests):
self.assertEqual(0x80, mpu.memory[0x00BB])
mpu.step()
self.assertEqual(0xE0, mpu.memory[0x00BB])
self.assertEqual(0, mpu.p & mpu.ZERO)
self.assertEqual(mpu.ZERO, mpu.p & mpu.ZERO)
self.assertEqual(0x0002, mpu.pc)
self.assertEqual(5, mpu.processorCycles)
@ -1255,7 +1255,7 @@ class MPUTests(unittest.TestCase, Common6502Tests):
self.assertEqual(0xE0, mpu.memory[0xFEED])
mpu.step()
self.assertEqual(0xF0, mpu.memory[0xFEED])
self.assertEqual(mpu.ZERO, mpu.p & mpu.ZERO)
self.assertEqual(0, mpu.p & mpu.ZERO)
self.assertEqual(0x0003, mpu.pc)
self.assertEqual(6, mpu.processorCycles)
@ -1268,7 +1268,7 @@ class MPUTests(unittest.TestCase, Common6502Tests):
self.assertEqual(0x80, mpu.memory[0xFEED])
mpu.step()
self.assertEqual(0xE0, mpu.memory[0xFEED])
self.assertEqual(0, mpu.p & mpu.ZERO)
self.assertEqual(mpu.ZERO, mpu.p & mpu.ZERO)
self.assertEqual(0x0003, mpu.pc)
self.assertEqual(6, mpu.processorCycles)
@ -1283,7 +1283,7 @@ class MPUTests(unittest.TestCase, Common6502Tests):
self.assertEqual(0xE0, mpu.memory[0x00BB])
mpu.step()
self.assertEqual(0x80, mpu.memory[0x00BB])
self.assertEqual(mpu.ZERO, mpu.p & mpu.ZERO)
self.assertEqual(0, mpu.p & mpu.ZERO)
self.assertEqual(0x0002, mpu.pc)
self.assertEqual(5, mpu.processorCycles)
@ -1296,7 +1296,7 @@ class MPUTests(unittest.TestCase, Common6502Tests):
self.assertEqual(0x80, mpu.memory[0x00BB])
mpu.step()
self.assertEqual(0x80, mpu.memory[0x00BB])
self.assertEqual(0, mpu.p & mpu.ZERO)
self.assertEqual(mpu.ZERO, mpu.p & mpu.ZERO)
self.assertEqual(0x0002, mpu.pc)
self.assertEqual(5, mpu.processorCycles)
@ -1311,7 +1311,7 @@ class MPUTests(unittest.TestCase, Common6502Tests):
self.assertEqual(0xE0, mpu.memory[0xFEED])
mpu.step()
self.assertEqual(0x80, mpu.memory[0xFEED])
self.assertEqual(mpu.ZERO, mpu.p & mpu.ZERO)
self.assertEqual(0, mpu.p & mpu.ZERO)
self.assertEqual(0x0003, mpu.pc)
self.assertEqual(6, mpu.processorCycles)
@ -1324,7 +1324,7 @@ class MPUTests(unittest.TestCase, Common6502Tests):
self.assertEqual(0x80, mpu.memory[0xFEED])
mpu.step()
self.assertEqual(0x80, mpu.memory[0xFEED])
self.assertEqual(0, mpu.p & mpu.ZERO)
self.assertEqual(mpu.ZERO, mpu.p & mpu.ZERO)
self.assertEqual(0x0003, mpu.pc)
self.assertEqual(6, mpu.processorCycles)