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def pad_bytearray(ba: bytearray, to_length: int = 64 * 1024) -> bytearray:
"""
Pads a bytearray with zeros until it reaches a specified length.
:param to_length: Target length in bytes.
:param ba: The bytearray to be padded.
:return: The padded bytearray.
"""
padding_size = to_length - len(ba)
if padding_size > 0:
ba.extend(b'\x00' * padding_size)
return ba
def make_rom(words: list[int]) -> bytearray:
"""
Constructs a ROM image from a list of 16-bit words.
:param words: The list of 16-bit words.
:return: The ROM image as a bytearray.
"""
bytes = []
for word in words:
bytes.append((word >> 8) & 0xFF)
bytes.append(word & 0xFF)
return pad_bytearray(bytearray(bytes))
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