1 files changed, 38 insertions, 0 deletions
diff --git a/atk16_emu/opcodes.py b/atk16_emu/opcodes.py
new file mode 100644
index 0000000..268c873
--- /dev/null
+++ b/atk16_emu/opcodes.py
@@ -0,0 +1,38 @@
+from typing import Literal
+from dataclasses import dataclass
+
+Opcode = Literal[
+  "ALR",
+  "ALI",
+  "LDR",
+  "STR",
+  "LDI",
+  "JPR",
+  "JPI",
+  "BRR",
+  "BRI",
+  "LPC",
+  "NOP",
+  "ISRP0",
+  "ISRP1",
+  "RTI",
+  "HLT",
+]
+
+@dataclass
+class ALR():
+  target: int
+  left: int
+  right: int
+  alu_code: int
+
+@dataclass
+class ALI():
+  target: int
+  left: int
+  imm: int
+  alu_code: int
+
+@dataclass
+class HLT():
+  pass