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Fixed bug in EOR and added unit tests.

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This commit is contained in:
Mike Naberezny 2008-07-20 04:24:45 +00:00
parent aaa61e760f
commit c650a0dc0c
3 changed files with 213 additions and 4 deletions
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1
TODO.txt
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@ -4,6 +4,5 @@ Instructions needing unit tests:
cpx
cpy
dec
eor
inc
sbc

4
mpu.py
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@ -240,8 +240,8 @@ class MPU:
self.RAM[addr] = tbyte & 0xFF
def opEOR(self, x):
self.a^=self.ByteAt(x())
self.FlagsNZ(a)
self.a ^= self.ByteAt(x())
self.FlagsNZ(self.a)
def opADC(self, x):
data=self.ByteAt(x())

212
mpu_test.py
View File

@ -1279,7 +1279,217 @@ class MPUTests(unittest.TestCase):
self.assertEquals(0x0001, mpu.pc)
self.assertEquals(0x00, mpu.y)
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
# EOR Absolute
def test_eor_absolute_flips_bits_over_setting_z_flag(self):
mpu = MPU()
mpu.a = 0xFF
mpu.memory[0x0000:0x0002] = (0x4D, 0xCD, 0xAB)
mpu.memory[0xABCD] = 0xFF
mpu.step()
self.assertEquals(0x0003, mpu.pc)
self.assertEquals(0x00, mpu.a)
self.assertEquals(0xFF, mpu.memory[0xABCD])
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
def test_eor_absolute_flips_bits_over_setting_n_flag(self):
mpu = MPU()
mpu.a = 0x00
mpu.memory[0x0000:0x0002] = (0x4D, 0xCD, 0xAB)
mpu.memory[0xABCD] = 0xFF
mpu.step()
self.assertEquals(0x0003, mpu.pc)
self.assertEquals(0xFF, mpu.a)
self.assertEquals(0xFF, mpu.memory[0xABCD])
self.assertEquals(mpu.NEGATIVE, mpu.flags & mpu.NEGATIVE)
self.assertEquals(0, mpu.flags & mpu.ZERO)
# EOR Zero Page
def test_eor_zp_flips_bits_over_setting_z_flag(self):
mpu = MPU()
mpu.a = 0xFF
mpu.memory[0x0000:0x0001] = (0x45, 0x10)
mpu.memory[0x0010] = 0xFF
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0x00, mpu.a)
self.assertEquals(0xFF, mpu.memory[0x0010])
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
def test_eor_zp_flips_bits_over_setting_n_flag(self):
mpu = MPU()
mpu.a = 0x00
mpu.memory[0x0000:0x0002] = (0x45, 0x10)
mpu.memory[0x0010] = 0xFF
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0xFF, mpu.a)
self.assertEquals(0xFF, mpu.memory[0x0010])
self.assertEquals(mpu.NEGATIVE, mpu.flags & mpu.NEGATIVE)
self.assertEquals(0, mpu.flags & mpu.ZERO)
# EOR Immediate
def test_eor_immediate_flips_bits_over_setting_z_flag(self):
mpu = MPU()
mpu.a = 0xFF
mpu.memory[0x0000:0x0001] = (0x49, 0xFF)
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0x00, mpu.a)
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
def test_eor_immediate_flips_bits_over_setting_n_flag(self):
mpu = MPU()
mpu.a = 0x00
mpu.memory[0x0000:0x0002] = (0x49, 0xFF)
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0xFF, mpu.a)
self.assertEquals(mpu.NEGATIVE, mpu.flags & mpu.NEGATIVE)
self.assertEquals(0, mpu.flags & mpu.ZERO)
# EOR Absolute, X-Indexed
def test_eor_absolute_x_indexed_flips_bits_over_setting_z_flag(self):
mpu = MPU()
mpu.a = 0xFF
mpu.x = 0x03
mpu.memory[0x0000:0x0002] = (0x5D, 0xCD, 0xAB)
mpu.memory[0xABCD + mpu.x] = 0xFF
mpu.step()
self.assertEquals(0x0003, mpu.pc)
self.assertEquals(0x00, mpu.a)
self.assertEquals(0xFF, mpu.memory[0xABCD + mpu.x])
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
def test_eor_absolute_x_indexed_flips_bits_over_setting_n_flag(self):
mpu = MPU()
mpu.a = 0x00
mpu.x = 0x03
mpu.memory[0x0000:0x0002] = (0x5D, 0xCD, 0xAB)
mpu.memory[0xABCD + mpu.x] = 0xFF
mpu.step()
self.assertEquals(0x0003, mpu.pc)
self.assertEquals(0xFF, mpu.a)
self.assertEquals(0xFF, mpu.memory[0xABCD + mpu.x])
self.assertEquals(mpu.NEGATIVE, mpu.flags & mpu.NEGATIVE)
self.assertEquals(0, mpu.flags & mpu.ZERO)
# EOR Absolute, Y-Indexed
def test_eor_absolute_y_indexed_flips_bits_over_setting_z_flag(self):
mpu = MPU()
mpu.a = 0xFF
mpu.y = 0x03
mpu.memory[0x0000:0x0002] = (0x59, 0xCD, 0xAB)
mpu.memory[0xABCD + mpu.y] = 0xFF
mpu.step()
self.assertEquals(0x0003, mpu.pc)
self.assertEquals(0x00, mpu.a)
self.assertEquals(0xFF, mpu.memory[0xABCD + mpu.y])
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
def test_eor_absolute_y_indexed_flips_bits_over_setting_n_flag(self):
mpu = MPU()
mpu.a = 0x00
mpu.y = 0x03
mpu.memory[0x0000:0x0002] = (0x59, 0xCD, 0xAB)
mpu.memory[0xABCD + mpu.y] = 0xFF
mpu.step()
self.assertEquals(0x0003, mpu.pc)
self.assertEquals(0xFF, mpu.a)
self.assertEquals(0xFF, mpu.memory[0xABCD + mpu.y])
self.assertEquals(mpu.NEGATIVE, mpu.flags & mpu.NEGATIVE)
self.assertEquals(0, mpu.flags & mpu.ZERO)
# EOR Indirect, Indexed (X)
def test_eor_indirect_indexed_x_flips_bits_over_setting_z_flag(self):
mpu = MPU()
mpu.a = 0xFF
mpu.x = 0x03
mpu.memory[0x0000:0x0001] = (0x41, 0x10) #=> EOR ($0010,X)
mpu.memory[0x0013:0x0014] = (0xCD, 0xAB) #=> Vector to $ABCD
mpu.memory[0xABCD] = 0xFF
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0x00, mpu.a)
self.assertEquals(0xFF, mpu.memory[0xABCD])
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
def test_eor_indirect_indexed_x_flips_bits_over_setting_n_flag(self):
mpu = MPU()
mpu.a = 0x00
mpu.x = 0x03
mpu.memory[0x0000:0x0001] = (0x41, 0x10) #=> EOR ($0010,X)
mpu.memory[0x0013:0x0014] = (0xCD, 0xAB) #=> Vector to $ABCD
mpu.memory[0xABCD] = 0xFF
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0xFF, mpu.a)
self.assertEquals(0xFF, mpu.memory[0xABCD])
self.assertEquals(mpu.NEGATIVE, mpu.flags & mpu.NEGATIVE)
self.assertEquals(0, mpu.flags & mpu.ZERO)
# EOR Indexed, Indirect (Y)
def test_eor_indexed_indirect_y_flips_bits_over_setting_z_flag(self):
mpu = MPU()
mpu.a = 0xFF
mpu.y = 0x03
mpu.memory[0x0000:0x0001] = (0x51, 0x10) #=> EOR ($0010),Y
mpu.memory[0x0010:0x0011] = (0xCD, 0xAB) #=> Vector to $ABCD
mpu.memory[0xABCD + mpu.y] = 0xFF
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0x00, mpu.a)
self.assertEquals(0xFF, mpu.memory[0xABCD + mpu.y])
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
def test_eor_indexed_indirect_y_flips_bits_over_setting_n_flag(self):
mpu = MPU()
mpu.a = 0x00
mpu.y = 0x03
mpu.memory[0x0000:0x0001] = (0x51, 0x10) #=> EOR ($0010),Y
mpu.memory[0x0010:0x0011] = (0xCD, 0xAB) #=> Vector to $ABCD
mpu.memory[0xABCD + mpu.y] = 0xFF
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0xFF, mpu.a)
self.assertEquals(0xFF, mpu.memory[0xABCD + mpu.y])
self.assertEquals(mpu.NEGATIVE, mpu.flags & mpu.NEGATIVE)
self.assertEquals(0, mpu.flags & mpu.ZERO)
# EOR Zero Page, X-Indexed
def test_eor_zp_x_indexed_flips_bits_over_setting_z_flag(self):
mpu = MPU()
mpu.a = 0xFF
mpu.x = 0x03
mpu.memory[0x0000:0x0001] = (0x55, 0x10)
mpu.memory[0x0010 + mpu.x] = 0xFF
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0x00, mpu.a)
self.assertEquals(0xFF, mpu.memory[0x0010 + mpu.x])
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
def test_eor_zp_x_indexed_flips_bits_over_setting_n_flag(self):
mpu = MPU()
mpu.a = 0x00
mpu.x = 0x03
mpu.memory[0x0000:0x0002] = (0x55, 0x10)
mpu.memory[0x0010 + mpu.x] = 0xFF
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0xFF, mpu.a)
self.assertEquals(0xFF, mpu.memory[0x0010 + mpu.x])
self.assertEquals(mpu.NEGATIVE, mpu.flags & mpu.NEGATIVE)
self.assertEquals(0, mpu.flags & mpu.ZERO)
# INX
def test_inx_increments_x(self):