1 files changed, 192 insertions, 0 deletions
diff --git a/nandgame/assembler/disas_test.py b/nandgame/assembler/disas_test.py
new file mode 100644
index 0000000..5c89f68
--- /dev/null
+++ b/nandgame/assembler/disas_test.py
@@ -0,0 +1,192 @@
+import unittest
+
+from disas import decode_instruction_complete as di
+
+
+def make_instruction(ins):
+    ins <<= 6
+    ins |= 0x8000
+    return ins
+
+
+def dbglog(message: str):
+    print("\n", end="")
+    print(message, end="")
+
+
+class DisasUnitTest(unittest.TestCase):
+    # from nandgame
+    # opcode | u | op | op0 | zx | sw
+    # D+A    | 1 | 0  | 0   | 0  | 0
+    def test_add(self):
+        ins = 0b10000
+        ins = make_instruction(ins)
+        (mnemonic, _, X, Y, _) = di(ins)
+        dbglog(f"    {mnemonic} {X}, {Y}")
+        self.assertEqual(mnemonic, "add")
+        self.assertEqual(X, "D")
+        self.assertEqual(Y, "A")
+
+    # D-A    | 1 | 1  | 0   | 0  | 0
+    def test_sub1(self):
+        ins = 0b11000
+        ins = make_instruction(ins)
+        (mnemonic, _, X, Y, _) = di(ins)
+        dbglog(f"    {mnemonic} {X}, {Y}")
+        self.assertEqual(mnemonic, "sub")
+        self.assertEqual(X, "D")
+        self.assertEqual(Y, "A")
+
+    # A-D    | 1 | 1  | 0   | 0  | 1
+    def test_sub2(self):
+        ins = 0b11001
+        ins = make_instruction(ins)
+        (mnemonic, _, X, Y, _) = di(ins)
+        dbglog(f"    {mnemonic} {X}, {Y}")
+        self.assertEqual(mnemonic, "sub")
+        self.assertEqual(X, "A")
+        self.assertEqual(Y, "D")
+
+    # D+1    | 1 | 0  | 1   | 0  | 0
+    def test_incD(self):
+        ins = 0b10100
+        ins = make_instruction(ins)
+        (mnemonic, _, X, Y, _) = di(ins)
+        dbglog(f"    {mnemonic} {X}, {Y}")
+        self.assertEqual(mnemonic, "inc")
+        self.assertEqual(X, "D")
+        self.assertEqual(Y, "")
+
+    # A+1    | 1 | 0  | 1   | 0  | 1
+    def test_incA(self):
+        ins = 0b10101
+        ins = make_instruction(ins)
+        (mnemonic, _, X, Y, _) = di(ins)
+        dbglog(f"    {mnemonic} {X}, {Y}")
+        self.assertEqual(mnemonic, "inc")
+        self.assertEqual(X, "A")
+        self.assertEqual(Y, "")
+
+    # D-1    | 1 | 1  | 1   | 0  | 0
+    def test_decD(self):
+        ins = 0b11100
+        ins = make_instruction(ins)
+        (mnemonic, _, X, Y, _) = di(ins)
+        dbglog(f"    {mnemonic} {X}, {Y}")
+        self.assertEqual(mnemonic, "dec")
+        self.assertEqual(X, "D")
+        self.assertEqual(Y, "")
+
+    # A-1    | 1 | 1  | 1   | 0  | 1
+    def test_decA(self):
+        ins = 0b11101
+        ins = make_instruction(ins)
+        (mnemonic, _, X, Y, _) = di(ins)
+        dbglog(f"    {mnemonic} {X}, {Y}")
+        self.assertEqual(mnemonic, "dec")
+        self.assertEqual(X, "A")
+        self.assertEqual(Y, "")
+
+    # -D     | 1 | 1  | 0   | 1  | 1
+    def test_minusD(self):
+        ins = 0b11011
+        ins = make_instruction(ins)
+        (mnemonic, _, X, Y, _) = di(ins)
+        dbglog(f"    {mnemonic} {X}, {Y}")
+        self.assertEqual(mnemonic, "sub")
+        self.assertEqual(X, "0")
+        self.assertEqual(Y, "D")
+
+    # -A     | 1 | 1  | 0   | 1  | 0
+    def test_minusA(self):
+        ins = 0b11010
+        ins = make_instruction(ins)
+        (mnemonic, _, X, Y, _) = di(ins)
+        dbglog(f"    {mnemonic} {X}, {Y}")
+        self.assertEqual(mnemonic, "sub")
+        self.assertEqual(X, "0")
+        self.assertEqual(Y, "A")
+
+    # -1     | 1 | 1  | 1   | 1  | 0
+    def test_minusOne(self):
+        ins = 0b11110
+        ins = make_instruction(ins)
+        (mnemonic, _, X, Y, _) = di(ins)
+        dbglog(f"    {mnemonic} {X}, {Y}")
+        self.assertEqual(mnemonic, "dec")
+        self.assertEqual(X, "0")
+        self.assertEqual(Y, "")
+
+    # 1      | 1 | 0  | 1   | 1  | 0
+    def test_plusOne(self):
+        ins = 0b10110
+        ins = make_instruction(ins)
+        (mnemonic, _, X, Y, _) = di(ins)
+        dbglog(f"    {mnemonic} {X}, {Y}")
+        self.assertEqual(mnemonic, "inc")
+        self.assertEqual(X, "0")
+        self.assertEqual(Y, "")
+
+    # D      | 1 | 0  | 0   | 1  | 1
+    def test_D(self):
+        ins = 0b10011
+        ins = make_instruction(ins)
+        (mnemonic, _, X, Y, _) = di(ins)
+        dbglog(f"    {mnemonic} {X}, {Y}")
+        self.assertEqual(mnemonic, "add")
+        self.assertEqual(X, "0")
+        self.assertEqual(Y, "D")
+
+    # A      | 1 | 0  | 0   | 1  | 0
+    def test_A(self):
+        ins = 0b10010
+        ins = make_instruction(ins)
+        (mnemonic, _, X, Y, _) = di(ins)
+        dbglog(f"    {mnemonic} {X}, {Y}")
+        self.assertEqual(mnemonic, "add")
+        self.assertEqual(X, "0")
+        self.assertEqual(Y, "A")
+
+    # D&A    | 0 | 0  | 0   | 0  | 0
+    def test_DandA(self):
+        ins = 0b00000
+        ins = make_instruction(ins)
+        (mnemonic, _, X, Y, _) = di(ins)
+        dbglog(f"    {mnemonic} {X}, {Y}")
+        self.assertEqual(mnemonic, "and")
+        self.assertEqual(X, "D")
+        self.assertEqual(Y, "A")
+
+    # D|A    | 0 | 0  | 1   | 0  | 0
+    def test_DorA(self):
+        ins = 0b00100
+        ins = make_instruction(ins)
+        (mnemonic, _, X, Y, _) = di(ins)
+        dbglog(f"    {mnemonic} {X}, {Y}")
+        self.assertEqual(mnemonic, "or")
+        self.assertEqual(X, "D")
+        self.assertEqual(Y, "A")
+
+    # ~D     | 0 | 1  | 1   | 0  | 0
+    def test_negD(self):
+        ins = 0b01100
+        ins = make_instruction(ins)
+        (mnemonic, _, X, Y, _) = di(ins)
+        dbglog(f"    {mnemonic} {X}, {Y}")
+        self.assertEqual(mnemonic, "neg")
+        self.assertEqual(X, "D")
+        self.assertEqual(Y, "")
+
+    # ~A     | 0 | 1  | 1   | 0  | 1
+    def test_negD(self):
+        ins = 0b01101
+        ins = make_instruction(ins)
+        (mnemonic, _, X, Y, _) = di(ins)
+        dbglog(f"    {mnemonic} {X}, {Y}")
+        self.assertEqual(mnemonic, "neg")
+        self.assertEqual(X, "A")
+        self.assertEqual(Y, "")
+
+
+if __name__ == "__main__":
+    unittest.main()