makerom-rs
Ben Eater style ROM manipilation, instead of using Python.
Simply run cargo r and check your firmware file with
$ hexdump -C rom.bin
00000000 a9 ff 8d 02 60 a9 55 8d 00 60 a9 aa 8d 02 60 4c |....`.U..`....`L|
00000010 05 80 ea ea ea ea ea ea ea ea ea ea ea ea ea ea |................|
00000020 ea ea ea ea ea ea ea ea ea ea ea ea ea ea ea ea |................|
*
00007ff0 ea ea ea ea ea ea ea ea ea ea ea ea 00 80 ea ea |................|
00008000