1 files changed, 3 insertions, 3 deletions
diff --git a/nandgame/assembler/disas.py b/nandgame/assembler/disas.py
index 9353bb5..6f520bc 100755
--- a/nandgame/assembler/disas.py
+++ b/nandgame/assembler/disas.py
@@ -51,7 +51,7 @@ def decode_jump(ins: int) -> str:
 
 
 # return op, and whether it's a one-op or two-op
-def decode_ins(ins: int) -> (str, bool):
+def decode_ins(ins: int) -> tuple[str, bool]:
     opcode = (ins >> 8) & 0x03
     ar_n_log = (ins & (1 << 10)) != 0
     opcode |= ar_n_log << 2
@@ -73,7 +73,7 @@ def decode_ins(ins: int) -> (str, bool):
     if opcode == 0b111:
         return "dec", False
 
-    return "<?>"
+    return "<?>", False
 
 
 # normally, X = arg1 = D
@@ -206,8 +206,8 @@ def main():
         print(f"Usage: {sys.argv[0]} [filename]")
         sys.exit(1)
 
+    filename = sys.argv[1]
     try:
-        filename = sys.argv[1]
         with open(filename, "rb") as f:
             while True:
                 insb = f.read(2)