1 files changed, 43 insertions, 0 deletions
diff --git a/nandgame/assembler/disas_main.py b/nandgame/assembler/disas_main.py
new file mode 100644
index 0000000..05ce466
--- /dev/null
+++ b/nandgame/assembler/disas_main.py
@@ -0,0 +1,43 @@
+import sys
+
+import py_nand_ass.disas as dass  # pyright: ignore[reportImplicitRelativeImport]
+
+
+def main():
+    if len(sys.argv) != 2:
+        print(f"Usage: {sys.argv[0]} [filename]")
+        sys.exit(1)
+
+    filename = sys.argv[1]
+    try:
+        with open(filename, "rb") as f:
+            while True:
+                insb = f.read(2)
+                if not insb:
+                    break
+                ins = int.from_bytes(insb, byteorder=ENDIANNESS)
+                if ENDIANNESS in ["big", "be"]:
+                    raw_ins = f"{insb[0]:02x} {insb[1]:02x}"
+                elif ENDIANNESS in ["little", "le"]:
+                    raw_ins = f"{insb[1]:02x} {insb[0]:02x}"
+                else:
+                    raw_ins = f"?? ??"
+                decoded_ins = dass.print_decoded(ins, False)
+                decoded_ins2 = dass.print_decoded(ins, True)
+                if decoded_ins == decoded_ins2:
+                    line = f"\t{raw_ins}\t{decoded_ins}"
+                else:
+                    line = f"\t{raw_ins}\t{decoded_ins2:<25}; {decoded_ins}"
+
+                print(line)
+
+    except FileNotFoundError:
+        print(f"File {filename} not found.")
+        sys.exit(1)
+    # head, tail...
+    except BrokenPipeError:
+        sys.exit(0)
+
+
+if __name__ == "__main__":
+    main()