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Added unit tests for BIT.

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This commit is contained in:
Mike Naberezny 2009-02-23 23:06:34 -08:00
parent d12152cd20
commit 941aa210a0
2 changed files with 142 additions and 1 deletions
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1
TODO
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@ -1,5 +1,4 @@
Instructions needing unit tests:
bit
cmp
cpx
cpy

142
src/py65/tests/test_mpu6502.py
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@ -1040,7 +1040,149 @@ class MPUTests(unittest.TestCase):
mpu.memory[0x0000:0x0001] = (0xF0, 0x06) #=> BEQ +6
mpu.step()
self.assertEquals(0x0002, mpu.pc)
# BIT (Absolute)
def test_bit_abs_copies_bit_7_of_memory_to_n_flag_when_0(self):
mpu = MPU()
mpu.flags &= ~(mpu.NEGATIVE)
mpu.memory[0x0000:0x0002] = (0x2C, 0xED, 0xFE) #=> BIT $FEED
mpu.memory[0xFEED] = 0xFF
mpu.a = 0xFF
mpu.step()
self.assertEquals(mpu.NEGATIVE, mpu.flags & mpu.NEGATIVE)
def test_bit_abs_copies_bit_7_of_memory_to_n_flag_when_1(self):
mpu = MPU()
mpu.flags &= mpu.NEGATIVE
mpu.memory[0x0000:0x0002] = (0x2C, 0xED, 0xFE) #=> BIT $FEED
mpu.memory[0xFEED] = 0x00
mpu.a = 0xFF
mpu.step()
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_bit_abs_copies_bit_6_of_memory_to_v_flag_when_0(self):
mpu = MPU()
mpu.flags &= ~(mpu.OVERFLOW)
mpu.memory[0x0000:0x0002] = (0x2C, 0xED, 0xFE) #=> BIT $FEED
mpu.memory[0xFEED] = 0xFF
mpu.a = 0xFF
mpu.step()
self.assertEquals(mpu.OVERFLOW, mpu.flags & mpu.OVERFLOW)
def test_bit_abs_copies_bit_6_of_memory_to_v_flag_when_1(self):
mpu = MPU()
mpu.flags &= mpu.OVERFLOW
mpu.memory[0x0000:0x0002] = (0x2C, 0xED, 0xFE) #=> BIT $FEED
mpu.memory[0xFEED] = 0x00
mpu.a = 0xFF
mpu.step()
self.assertEquals(0, mpu.flags & mpu.OVERFLOW)
def test_bit_abs_stores_result_of_and_in_z_while_preserving_a_when_1(self):
mpu = MPU()
mpu.flags &= mpu.ZERO
mpu.memory[0x0000:0x0002] = (0x2C, 0xED, 0xFE) #=> BIT $FEED
mpu.memory[0xFEED] = 0x00
mpu.a = 0x01
mpu.step()
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
self.assertEquals(0x01, mpu.a)
self.assertEquals(0x00, mpu.memory[0xFEED])
def test_bit_abs_stores_result_of_and_when_nonzero_in_z_while_preserving_a(self):
mpu = MPU()
mpu.flags &= mpu.ZERO
mpu.memory[0x0000:0x0002] = (0x2C, 0xED, 0xFE) #=> BIT $FEED
mpu.memory[0xFEED] = 0x01
mpu.a = 0x01
mpu.step()
self.assertEquals(0, mpu.flags & mpu.ZERO) # result of AND is non-zero
self.assertEquals(0x01, mpu.a)
self.assertEquals(0x01, mpu.memory[0xFEED])
def test_bit_abs_stores_result_of_and_when_zero_in_z_while_preserving_a(self):
mpu = MPU()
mpu.flags &= ~(mpu.ZERO)
mpu.memory[0x0000:0x0002] = (0x2C, 0xED, 0xFE) #=> BIT $FEED
mpu.memory[0xFEED] = 0x00
mpu.a = 0x01
mpu.step()
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO) # result of AND is zero
self.assertEquals(0x01, mpu.a)
self.assertEquals(0x00, mpu.memory[0xFEED])
# BIT (Zero Page)
def test_bit_zp_copies_bit_7_of_memory_to_n_flag_when_0(self):
mpu = MPU()
mpu.flags &= ~(mpu.NEGATIVE)
mpu.memory[0x0000:0x0002] = (0x24, 0x10) #=> BIT $0010
mpu.memory[0x0010] = 0xFF
mpu.a = 0xFF
mpu.step()
self.assertEquals(mpu.NEGATIVE, mpu.flags & mpu.NEGATIVE)
def test_bit_zp_copies_bit_7_of_memory_to_n_flag_when_1(self):
mpu = MPU()
mpu.flags &= mpu.NEGATIVE
mpu.memory[0x0000:0x0002] = (0x24, 0x10) #=> BIT $0010
mpu.memory[0x0010] = 0x00
mpu.a = 0xFF
mpu.step()
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_bit_zp_copies_bit_6_of_memory_to_v_flag_when_0(self):
mpu = MPU()
mpu.flags &= ~(mpu.OVERFLOW)
mpu.memory[0x0000:0x0002] = (0x24, 0x10) #=> BIT $0010
mpu.memory[0x0010] = 0xFF
mpu.a = 0xFF
mpu.step()
self.assertEquals(mpu.OVERFLOW, mpu.flags & mpu.OVERFLOW)
def test_bit_zp_copies_bit_6_of_memory_to_v_flag_when_1(self):
mpu = MPU()
mpu.flags &= mpu.OVERFLOW
mpu.memory[0x0000:0x0002] = (0x24, 0x10) #=> BIT $0010
mpu.memory[0x0010] = 0x00
mpu.a = 0xFF
mpu.step()
self.assertEquals(0, mpu.flags & mpu.OVERFLOW)
def test_bit_zp_stores_result_of_and_in_z_while_preserving_a_when_1(self):
mpu = MPU()
mpu.flags &= mpu.ZERO
mpu.memory[0x0000:0x0002] = (0x24, 0x10) #=> BIT $0010
mpu.memory[0x0010] = 0x00
mpu.a = 0x01
mpu.step()
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
self.assertEquals(0x01, mpu.a)
self.assertEquals(0x00, mpu.memory[0x0010])
def test_bit_zp_stores_result_of_and_when_nonzero_in_z_while_preserving_a(self):
mpu = MPU()
mpu.flags &= mpu.ZERO
mpu.memory[0x0000:0x0002] = (0x24, 0x10) #=> BIT $0010
mpu.memory[0x0010] = 0x01
mpu.a = 0x01
mpu.step()
self.assertEquals(0, mpu.flags & mpu.ZERO) # result of AND is non-zero
self.assertEquals(0x01, mpu.a)
self.assertEquals(0x01, mpu.memory[0x0010])
def test_bit_zp_stores_result_of_and_when_zero_in_z_while_preserving_a(self):
mpu = MPU()
mpu.flags &= ~(mpu.ZERO)
mpu.memory[0x0000:0x0002] = (0x24, 0x10) #=> BIT $0010
mpu.memory[0x0010] = 0x00
mpu.a = 0x01
mpu.step()
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO) # result of AND is zero
self.assertEquals(0x01, mpu.a)
self.assertEquals(0x00, mpu.memory[0x0010])
# BMI
def test_bmi_negative_set_branches_relative_forward(self):