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Move two BCD test cases from the common 65x02 test cases to

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6502-specific.  The handling of invalid BCD arguments differs between
6502 and 65C02 and these are testing 6502-specific behaviour.
This commit is contained in:
kris 2017-07-22 23:42:29 +01:00
parent 4f52c95511
commit 9b5e1f3945
1 changed files with 36 additions and 34 deletions
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70
py65/tests/devices/test_mpu6502.py
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@ -391,26 +391,6 @@ class Common6502Tests:
self.assertEqual(0, mpu.p & mpu.ZERO)
self.assertEqual(0, mpu.p & mpu.CARRY)
def test_adc_bcd_on_immediate_9c_plus_9d(self):
mpu = self._make_mpu()
mpu.p |= mpu.DECIMAL
mpu.p &= ~(mpu.CARRY)
mpu.a = 0x9c
# $0000 ADC #$9d
# $0002 ADC #$9d
self._write(mpu.memory, 0x0000, (0x69, 0x9d))
self._write(mpu.memory, 0x0002, (0x69, 0x9d))
mpu.step()
self.assertEqual(0x9f, mpu.a)
self.assertEqual(mpu.CARRY, mpu.p & mpu.CARRY)
mpu.step()
self.assertEqual(0x0004, mpu.pc)
self.assertEqual(0x93, mpu.a)
self.assertEqual(0, mpu.p & mpu.NEGATIVE)
self.assertEqual(mpu.OVERFLOW, mpu.p & mpu.OVERFLOW)
self.assertEqual(0, mpu.p & mpu.ZERO)
self.assertEqual(mpu.CARRY, mpu.p & mpu.CARRY)
# ADC Absolute, X-Indexed
def test_adc_bcd_off_abs_x_carry_clear_in_accumulator_zeroes(self):
@ -4560,20 +4540,6 @@ class Common6502Tests:
self.assertEqual(0, mpu.p & mpu.ZERO)
self.assertEqual(0, mpu.p & mpu.CARRY)
def test_sbc_bcd_on_immediate_20_minus_0a_carry_unset(self):
mpu = self._make_mpu()
mpu.p |= mpu.DECIMAL
mpu.a = 0x20
# $0000 SBC #$00
self._write(mpu.memory, 0x0000, (0xe9, 0x0a))
mpu.step()
self.assertEqual(0x0002, mpu.pc)
self.assertEqual(0x1f, mpu.a)
self.assertEqual(0, mpu.p & mpu.NEGATIVE)
self.assertEqual(0, mpu.p & mpu.OVERFLOW)
self.assertEqual(0, mpu.p & mpu.ZERO)
self.assertEqual(mpu.CARRY, mpu.p & mpu.CARRY)
# SBC Absolute, X-Indexed
def test_sbc_abs_x_all_zeros_and_no_borrow_is_zero(self):
@ -5873,6 +5839,42 @@ class MPUTests(unittest.TestCase, Common6502Tests):
mpu.step()
self.assertEqual(0x3f, mpu.a)
# Different undefined BCD behaviour between 6502 and 65C02
def test_adc_bcd_on_immediate_9c_plus_9d(self):
mpu = self._make_mpu()
mpu.p |= mpu.DECIMAL
mpu.p &= ~(mpu.CARRY)
mpu.a = 0x9c
# $0000 ADC #$9d
# $0002 ADC #$9d
self._write(mpu.memory, 0x0000, (0x69, 0x9d))
self._write(mpu.memory, 0x0002, (0x69, 0x9d))
mpu.step()
self.assertEqual(0x9f, mpu.a)
self.assertEqual(mpu.CARRY, mpu.p & mpu.CARRY)
mpu.step()
self.assertEqual(0x0004, mpu.pc)
self.assertEqual(0x93, mpu.a)
self.assertEqual(0, mpu.p & mpu.NEGATIVE)
self.assertEqual(mpu.OVERFLOW, mpu.p & mpu.OVERFLOW)
self.assertEqual(0, mpu.p & mpu.ZERO)
self.assertEqual(mpu.CARRY, mpu.p & mpu.CARRY)
def test_sbc_bcd_on_immediate_20_minus_0a_carry_unset(self):
mpu = self._make_mpu()
mpu.p |= mpu.DECIMAL
mpu.a = 0x20
# $0000 SBC #$00
self._write(mpu.memory, 0x0000, (0xe9, 0x0a))
mpu.step()
self.assertEqual(0x0002, mpu.pc)
self.assertEqual(0x1f, mpu.a)
self.assertEqual(0, mpu.p & mpu.NEGATIVE)
self.assertEqual(0, mpu.p & mpu.OVERFLOW)
self.assertEqual(0, mpu.p & mpu.ZERO)
self.assertEqual(mpu.CARRY, mpu.p & mpu.CARRY)
def _get_target_class(self):
return py65.devices.mpu6502.MPU