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Added 65C02 instruction STA (ZP).

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This commit is contained in:
Mike Naberezny 2009-04-08 19:04:05 -07:00
parent e61b29dbcd
commit 9876bdb8fa
2 changed files with 51 additions and 16 deletions
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37
src/py65/devices/mpu65c02.py
View File

@ -80,8 +80,13 @@ class MPU(NMOS6502):
@instruction(name="PHY", mode="imp", cycles=4)
def i7a(self):
self.y = self.stPop()
self.FlagsNZ(self.y)
self.y = self.stPop()
self.FlagsNZ(self.y)
@instruction(name="STA", mode="zpi", cycles=5)
def i92(self):
self.opSTA(self.ZeroPageIndirectAddr)
self.pc += 1
@instruction(name="STZ", mode="abs", cycles=4)
def i9c(self):
@ -104,36 +109,36 @@ class MPU(NMOS6502):
@instruction(name="PLX", mode="imp", cycles=4)
def ifa(self):
self.x = self.stPop()
self.FlagsNZ(self.x)
self.x = self.stPop()
self.FlagsNZ(self.x)
@instruction(name="TSB", mode="zpg", cycles=5)
def i04(self):
self.opTSB(self.ZeroPageAddr)
self.pc += 1
self.opTSB(self.ZeroPageAddr)
self.pc += 1
@instruction(name="TSB", mode="abs", cycles=6)
def i0c(self):
self.opTSB(self.AbsoluteAddr)
self.pc += 2
self.opTSB(self.AbsoluteAddr)
self.pc += 2
@instruction(name="TSB", mode="zpg", cycles=5)
def i04(self):
self.opTSB(self.ZeroPageAddr)
self.pc += 1
self.opTSB(self.ZeroPageAddr)
self.pc += 1
@instruction(name="TSB", mode="abs", cycles=6)
def i0c(self):
self.opTSB(self.AbsoluteAddr)
self.pc += 2
self.opTSB(self.AbsoluteAddr)
self.pc += 2
@instruction(name="TRB", mode="zpg", cycles=5)
def i14(self):
self.opTRB(self.ZeroPageAddr)
self.pc += 1
self.opTRB(self.ZeroPageAddr)
self.pc += 1
@instruction(name="TRB", mode="abs", cycles=6)
def i1c(self):
self.opTRB(self.AbsoluteAddr)
self.pc += 2
self.opTRB(self.AbsoluteAddr)
self.pc += 2

30
src/py65/tests/devices/test_mpu65c02.py
View File

@ -250,6 +250,36 @@ class MPUTests(unittest.TestCase, Common6502Tests):
self.assertEquals(0xAB, mpu.y)
self.assertEquals(0xFF, mpu.sp)
self.assertEquals(4, mpu.processorCycles)
# STA Zero Page, Indirect
def test_sta_zp_indirect_stores_a_leaves_a_and_n_flag_unchanged(self):
mpu = self._make_mpu()
mpu.flags = flags = 0xFF & ~(mpu.NEGATIVE)
mpu.a = 0xFF
self._write(mpu.memory, 0x0000, (0x92, 0x10)) #=> STA ($0010)
self._write(mpu.memory, 0x0010, (0xED, 0xFE)) #=> Vector to $FEED
mpu.memory[0xFEED] = 0x00
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(5, mpu.processorCycles)
self.assertEquals(0xFF, mpu.memory[0xFEED])
self.assertEquals(0xFF, mpu.a)
self.assertEquals(flags, mpu.flags)
def test_sta_zp_indirect_stores_a_leaves_a_and_z_flag_unchanged(self):
mpu = self._make_mpu()
mpu.flags = flags = 0xFF & ~(mpu.ZERO)
mpu.a = 0x00
self._write(mpu.memory, 0x0000, (0x92, 0x10)) #=> STA ($0010)
self._write(mpu.memory, 0x0010, (0xED, 0xFE)) #=> Vector to $FEED
mpu.memory[0xFEED] = 0xFF
mpu.step()
self.assertEquals(0x0002, mpu.pc)
self.assertEquals(5, mpu.processorCycles)
self.assertEquals(0x00, mpu.memory[0xFEED])
self.assertEquals(0x00, mpu.a)
self.assertEquals(flags, mpu.flags)
# STZ Zero Page