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Improved tests for BIT.

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This commit is contained in:
Mike Naberezny 2009-04-08 20:07:08 -07:00
parent 1ebe890ccb
commit 6f135e1f44
1 changed files with 14 additions and 0 deletions
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14
src/py65/tests/devices/test_mpu6502.py
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@ -1125,6 +1125,8 @@ class Common6502Tests:
mpu.memory[0x0010] = 0xFF
mpu.a = 0xFF
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(3, mpu.processorCycles)
self.assertEquals(mpu.NEGATIVE, mpu.flags & mpu.NEGATIVE)
def test_bit_zp_copies_bit_7_of_memory_to_n_flag_when_1(self):
@ -1134,6 +1136,8 @@ class Common6502Tests:
mpu.memory[0x0010] = 0x00
mpu.a = 0xFF
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(3, mpu.processorCycles)
self.assertEquals(0, mpu.flags & mpu.NEGATIVE)
def test_bit_zp_copies_bit_6_of_memory_to_v_flag_when_0(self):
@ -1143,6 +1147,8 @@ class Common6502Tests:
mpu.memory[0x0010] = 0xFF
mpu.a = 0xFF
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(3, mpu.processorCycles)
self.assertEquals(mpu.OVERFLOW, mpu.flags & mpu.OVERFLOW)
def test_bit_zp_copies_bit_6_of_memory_to_v_flag_when_1(self):
@ -1152,6 +1158,8 @@ class Common6502Tests:
mpu.memory[0x0010] = 0x00
mpu.a = 0xFF
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(3, mpu.processorCycles)
self.assertEquals(0, mpu.flags & mpu.OVERFLOW)
def test_bit_zp_stores_result_of_and_in_z_while_preserving_a_when_1(self):
@ -1161,6 +1169,8 @@ class Common6502Tests:
mpu.memory[0x0010] = 0x00
mpu.a = 0x01
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(3, mpu.processorCycles)
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO)
self.assertEquals(0x01, mpu.a)
self.assertEquals(0x00, mpu.memory[0x0010])
@ -1172,6 +1182,8 @@ class Common6502Tests:
mpu.memory[0x0010] = 0x01
mpu.a = 0x01
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(3, mpu.processorCycles)
self.assertEquals(0, mpu.flags & mpu.ZERO) # result of AND is non-zero
self.assertEquals(0x01, mpu.a)
self.assertEquals(0x01, mpu.memory[0x0010])
@ -1183,6 +1195,8 @@ class Common6502Tests:
mpu.memory[0x0010] = 0x00
mpu.a = 0x01
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(3, mpu.processorCycles)
self.assertEquals(mpu.ZERO, mpu.flags & mpu.ZERO) # result of AND is zero
self.assertEquals(0x01, mpu.a)
self.assertEquals(0x00, mpu.memory[0x0010])