N64Swap

Swaps .n64, .v64 and .z64 roms. Written in Python 3. You must install numpy via e.g. pip. Code is kinda messy.

Usage

n64swap.py [-h] input output

Technical information

.z64 is the correct format and should be used. This handy table shows the difference:

ROM format	Type	First 4 bytes	Game Title in ROM
.z64	Big Endian	80 37 12 40	SUPER MARIO 64
.v64	Byteswapped	37 80 40 12	USEP RAMIR O64
.n64	Little Endian	40 12 37 80	EPUSAM R OIR 46

(Note that there are two spaces after both "64", they don't seem to show up here.)