swizzle is a utility for reordering (swizzling) the address and/or data bits of a ROM image.

Usage: swizzle [options] in_path out_path

Supported options:

• -h / --help - show this information and exit
• -a / --addr <bits> - specify address bit order (optional)
• -d / --data <bits> - specify data bit order (optional)
• -w / --word <num> - specify number of bytes per word (default 1, max 4)
• -b / --big - use big-endian byte ordering

<bits> is a comma-separated list of 0-based bit indexes (comma separated, most significant first).

Example: to reverse the order of bits in each byte:

swizzle -d0,1,2,3,4,5,6,7 in.bin out.bin