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Add tests for INC accumulator on 65C02

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Mike Naberezny 2014-03-11 21:24:41 -07:00
parent 943e236bd7
commit dbd12228d4
1 changed files with 32 additions and 0 deletions
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32
py65/tests/devices/test_mpu65c02.py
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@ -545,6 +545,38 @@ class MPUTests(unittest.TestCase, Common6502Tests):
self.assertEqual(mpu.NEGATIVE, mpu.p & mpu.NEGATIVE)
self.assertEqual(0, mpu.p & mpu.ZERO)
# INC Accumulator
def test_inc_acc_increments_accum(self):
mpu = self._make_mpu()
mpu.memory[0x0000] = 0x1A
mpu.a = 0x42
mpu.step()
self.assertEqual(0x0001, mpu.pc)
self.assertEqual(0x43, mpu.a)
self.assertEqual(0, mpu.p & mpu.ZERO)
self.assertEqual(0, mpu.p & mpu.NEGATIVE)
def test_inc_acc_increments_accum_rolls_over_and_sets_zero_flag(self):
mpu = self._make_mpu()
mpu.memory[0x0000] = 0x1A
mpu.a = 0xFF
mpu.step()
self.assertEqual(0x0001, mpu.pc)
self.assertEqual(0x00, mpu.a)
self.assertEqual(mpu.ZERO, mpu.p & mpu.ZERO)
self.assertEqual(0, mpu.p & mpu.NEGATIVE)
def test_inc_acc_sets_negative_flag_when_incrementing_above_7F(self):
mpu = self._make_mpu()
mpu.memory[0x0000] = 0x1A
mpu.a = 0x7F
mpu.step()
self.assertEqual(0x0001, mpu.pc)
self.assertEqual(0x80, mpu.a)
self.assertEqual(0, mpu.p & mpu.ZERO)
self.assertEqual(mpu.NEGATIVE, mpu.p & mpu.NEGATIVE)
# JMP Indirect
def test_jmp_ind_does_not_have_page_wrap_bug(self):