2 files changed, 60 insertions, 1 deletions
diff --git a/atk16-utils/pad_bin.py b/atk16-utils/pad_bin.py
new file mode 100644
index 0000000..9f014d1
--- /dev/null
+++ b/atk16-utils/pad_bin.py
@@ -0,0 +1,59 @@
+import os
+
+def pad_binary(file_path, target_size) -> int:
+  """
+  Pads a binary file with zeros until it reaches a specified size in KiB.
+
+  :param file_path: Path to the binary file to be padded.
+  :param target_size: Target size in bytes.
+  """
+
+  # Check current file size
+  current_size = os.path.getsize(file_path)
+
+  # Calculate needed padding
+  padding_size = target_size - current_size
+
+  # Append zeros if needed
+  if padding_size > 0:
+    with open(file_path, 'ab') as file:
+      file.write(b'\x00' * padding_size)
+
+  return padding_size
+
+def convert_size_to_bytes(size_str: str) -> int:
+  """
+  Converts a size string with K, M, or G suffix to bytes.
+
+  :param size_str: Size string (e.g., "64K", "1M", "2G").
+  :return: Size in bytes.
+  """
+  size_str = size_str.upper()
+  if size_str.endswith('K'):
+    return int(size_str[:-1]) * 1024
+  elif size_str.endswith('M'):
+    return int(size_str[:-1]) * 1024 ** 2
+  elif size_str.endswith('G'):
+    return int(size_str[:-1]) * 1024 ** 3
+  else:
+      return int(size_str)
+
+if __name__ == "__main__":
+  import argparse
+
+  # Setup argument parser
+  parser = argparse.ArgumentParser(description='Pad a binary file with zeros until it reaches a specified size.')
+  parser.add_argument('file', type=str, help='Path to the binary file to be padded.')
+  parser.add_argument('--to', dest='size', type=str, help='Target size (e.g., 64K, 1M, 2G).', required=True)
+
+  args = parser.parse_args()
+
+  # Convert size argument to bytes
+  target_size_bytes = convert_size_to_bytes(args.size)
+
+  padded_bytes_n = pad_binary(args.file, target_size_bytes)
+
+  if padded_bytes_n > 0:
+    print(f"File has been padded with {padded_bytes_n} zeros.")
+  else:
+    print("File is already equal to or larger than the target size. No padding added.")
diff --git a/atk16-utils/ucode.py b/atk16-utils/ucode.py
index 07d0554..22a2ce2 100755
--- a/atk16-utils/ucode.py
+++ b/atk16-utils/ucode.py
@@ -83,7 +83,7 @@ ucode = [
   not_branch([IM_EN|PC_OE|IPC_IE, ISRA_OE|MAR_IE, MEM_OE|PC_IE, US_RS, 0, 0, 0, 0]),
   # ISRP1 1101 XXXX XXXX XXXX
   not_branch([IM_EN|PC_OE|IPC_IE, ISRA_OE|MAR_IE, MEM_OE|PC_IE, US_RS, 0, 0, 0, 0]),
-  # RTI   1110 XXXX XXXX XXXX
+  # RTI 1110 XXXX XXXX XXXX
   not_branch([*fetch, IM_DS|IPC_OE|PC_IE, US_RS, 0, 0, 0, 0]),
   # HLT 1111 XXXX XXXX XXXX
   not_branch([*fetch, HALT, 0, 0, 0, 0, 0]),