6502/py65
1
0
Fork 0
mirror of https://github.com/mnaberez/py65.git synced 2024-10-01 20:55:17 +00:00
Code Issues Projects Releases Wiki Activity

two more BCD tests, presently failing according to Bruce Clark's test

Browse Source
This commit is contained in:
Ed Spittles 2010-12-15 20:20:17 +00:00
parent 80c9d10a54
commit 4bd92cf80e
1 changed files with 30 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
src/py65/tests/devices/test_mpu6502.py
View File

@ -347,6 +347,20 @@ class Common6502Tests:
self.assertEquals(0, mpu.p & mpu.ZERO)
self.assertEquals(0, mpu.p & mpu.CARRY)
def test_adc_bcd_on_immediate_6f_plus_00_carry_set(self):
mpu = self._make_mpu()
mpu.p |= mpu.DECIMAL
mpu.p |= mpu.CARRY
mpu.a = 0x6f
self._write(mpu.memory, 0x0000, (0x69, 0x00)) #=> $0000 ADC #$00
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0x76, mpu.a)
self.assertEquals(0, mpu.p & mpu.NEGATIVE)
self.assertEquals(0, mpu.p & mpu.OVERFLOW)
self.assertEquals(0, mpu.p & mpu.ZERO)
self.assertEquals(0, mpu.p & mpu.CARRY)
# ADC Absolute, X-Indexed
def test_adc_bcd_off_abs_x_carry_clear_in_accumulator_zeroes(self):
@ -4126,6 +4140,22 @@ class Common6502Tests:
self.assertEquals(0, mpu.p & mpu.ZERO)
self.assertEquals(mpu.CARRY, mpu.p & mpu.CARRY)
def test_sbc_bcd_on_immediate_00_minus_01_carry_set(self):
mpu = self._make_mpu()
mpu.p |= mpu.DECIMAL
mpu.p |= mpu.OVERFLOW
mpu.p |= mpu.ZERO
mpu.p |= mpu.CARRY
mpu.a = 0x00
self._write(mpu.memory, 0x0000, (0xe9, 0x01)) #=> $0000 SBC #$00
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(0x99, mpu.a)
self.assertEquals(mpu.NEGATIVE, mpu.p & mpu.NEGATIVE)
self.assertEquals(0, mpu.p & mpu.OVERFLOW)
self.assertEquals(0, mpu.p & mpu.ZERO)
self.assertEquals(0, mpu.p & mpu.CARRY)
# SBC Absolute, X-Indexed
def test_sbc_abs_x_all_zeros_and_no_borrow_is_zero(self):