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Fixed bugs in INC, added unit tests.

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This commit is contained in:
Mike Naberezny 2008-08-10 03:17:35 +00:00
parent 3064a249f3
commit 5a1de3a6c4
3 changed files with 144 additions and 9 deletions
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1
TODO.txt
View File

@ -4,5 +4,4 @@ Instructions needing unit tests:
cpx
cpy
dec
inc
sbc

10
mpu.py
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@ -381,12 +381,12 @@ class MPU:
addr = x()
tbyte = self.ByteAt(addr)
self.flags &= ~(self.ZERO + self.NEGATIVE)
tbyte += 1
tbyte = (tbyte + 1) & 0xFF
if tbyte:
self.flags |= tbyte&128
self.flags |= tbyte & self.NEGATIVE
else:
self.flags |= fZER
self.RAM[addr]=tbyte
self.flags |= self.ZERO
self.RAM[addr] = tbyte
def opLDA(self, x):
self.a = self.ByteAt(x())
@ -1028,7 +1028,7 @@ class MPU:
self.pc+=1
def ie6(self):
self.opINCR(ZeroPageAddr)
self.opINCR(self.ZeroPageAddr)
self.pc+=1
def ie8(self):

142
mpu_test.py
View File

@ -1489,7 +1489,139 @@ class MPUTests(unittest.TestCase):
self.assertEquals(0xFF, mpu.memory[0x0010 + mpu.x])
self.assertEquals(mpu.NEGATIVE, mpu.flags & mpu.NEGATIVE)
self.assertEquals(0, mpu.flags & mpu.ZERO)
# INC Absolute
def test_inc_abs_increments_memory(self):
mpu = MPU()
mpu.memory[0x0000:0x0002] = (0xEE, 0xCD, 0xAB)
mpu.memory[0xABCD] = 0x09
mpu.step()
self.assertEquals(0x0003, mpu.pc)
self.assertEquals(0x0A, mpu.memory[0xABCD])
self.assertEquals(0, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_inc_abs_increments_memory_rolls_over_and_sets_zero_flag(self):
mpu = MPU()
mpu.memory[0x0000:0x0002] = (0xEE, 0xCD, 0xAB)
mpu.memory[0xABCD] = 0xFF
mpu.step()
self.assertEquals(0x0003, mpu.pc)
self.assertEquals(0x00, mpu.memory[0xABCD])
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_inc_abs_sets_negative_flag_when_incrementing_above_7F(self):
mpu = MPU()
mpu.memory[0x0000:0x0002] = (0xEE, 0xCD, 0xAB)
mpu.memory[0xABCD] = 0x7F
mpu.step()
self.assertEquals(0x0003, mpu.pc)
self.assertEquals(0x80, mpu.memory[0xABCD])
self.assertEquals(0, mpu.flags & mpu.ZERO)
self.assertEquals(mpu.NEGATIVE, mpu.flags & mpu.NEGATIVE)
# INC Zero Page
def test_inc_zp_increments_memory(self):
mpu = MPU()
mpu.memory[0x0000:0x0001] = (0xE6, 0x10)
mpu.memory[0x0010] = 0x09
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0x0A, mpu.memory[0x0010])
self.assertEquals(0, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_inc_zp_increments_memory_rolls_over_and_sets_zero_flag(self):
mpu = MPU()
mpu.memory[0x0000:0x0001] = (0xE6, 0x10)
mpu.memory[0x0010] = 0xFF
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0x00, mpu.memory[0x0010])
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_inc_zp_sets_negative_flag_when_incrementing_above_7F(self):
mpu = MPU()
mpu.memory[0x0000:0x0001] = (0xE6, 0x10)
mpu.memory[0x0010] = 0x7F
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0x80, mpu.memory[0x0010])
self.assertEquals(0, mpu.flags & mpu.ZERO)
self.assertEquals(mpu.NEGATIVE, mpu.flags & mpu.NEGATIVE)
# INC Absolute, X-Indexed
def test_inc_abs_x_increments_memory(self):
mpu = MPU()
mpu.memory[0x0000:0x0002] = (0xFE, 0xCD, 0xAB)
mpu.x = 0x03
mpu.memory[0xABCD + mpu.x] = 0x09
mpu.step()
self.assertEquals(0x0003, mpu.pc)
self.assertEquals(0x0A, mpu.memory[0xABCD + mpu.x])
self.assertEquals(0, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_inc_abs_x_increments_memory_rolls_over_and_sets_zero_flag(self):
mpu = MPU()
mpu.memory[0x0000:0x0002] = (0xFE, 0xCD, 0xAB)
mpu.x = 0x03
mpu.memory[0xABCD + mpu.x] = 0xFF
mpu.step()
self.assertEquals(0x0003, mpu.pc)
self.assertEquals(0x00, mpu.memory[0xABCD + mpu.x])
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_inc_abs_x_sets_negative_flag_when_incrementing_above_7F(self):
mpu = MPU()
mpu.memory[0x0000:0x0002] = (0xFE, 0xCD, 0xAB)
mpu.x = 0x03
mpu.memory[0xABCD + mpu.x] = 0x7F
mpu.step()
self.assertEquals(0x0003, mpu.pc)
self.assertEquals(0x80, mpu.memory[0xABCD + mpu.x])
self.assertEquals(0, mpu.flags & mpu.ZERO)
self.assertEquals(mpu.NEGATIVE, mpu.flags & mpu.NEGATIVE)
# INC Zero Page, X-Indexed
def test_inc_zp_x_increments_memory(self):
mpu = MPU()
mpu.memory[0x0000:0x0001] = (0xF6, 0x10)
mpu.x = 0x03
mpu.memory[0x0010 + mpu.x] = 0x09
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0x0A, mpu.memory[0x0010 + mpu.x])
self.assertEquals(0, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_inc_zp_x_increments_memory_rolls_over_and_sets_zero_flag(self):
mpu = MPU()
mpu.memory[0x0000:0x0001] = (0xF6, 0x10)
mpu.memory[0x0010 + mpu.x] = 0xFF
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0x00, mpu.memory[0x0010 + mpu.x])
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_inc_zp_x_sets_negative_flag_when_incrementing_above_7F(self):
mpu = MPU()
mpu.memory[0x0000:0x0001] = (0xF6, 0x10)
mpu.memory[0x0010 + mpu.x] = 0x7F
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0x80, mpu.memory[0x0010 + mpu.x])
self.assertEquals(0, mpu.flags & mpu.ZERO)
self.assertEquals(mpu.NEGATIVE, mpu.flags & mpu.NEGATIVE)
# INX
def test_inx_increments_x(self):
@ -1499,7 +1631,9 @@ class MPUTests(unittest.TestCase):
mpu.step()
self.assertEquals(0x0001, mpu.pc)
self.assertEquals(0x0A, mpu.x)
self.assertEquals(0, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_inx_above_FF_rolls_over_and_sets_zero_flag(self):
mpu = MPU()
mpu.x = 0xFF
@ -1527,7 +1661,9 @@ class MPUTests(unittest.TestCase):
mpu.step()
self.assertEquals(0x0001, mpu.pc)
self.assertEquals(0x0A, mpu.y)
self.assertEquals(0, mpu.flags & mpu.ZERO)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_iny_above_FF_rolls_over_and_sets_zero_flag(self):
mpu = MPU()
mpu.y = 0xFF