bk2_to_dem.py

#!/usr/bin/env python3
import sys
import os
import zipfile

BTN_A      = 0x01
BTN_B      = 0x02
BTN_SELECT = 0x04
BTN_START  = 0x08
BTN_RIGHT  = 0x10
BTN_LEFT   = 0x20
BTN_UP     = 0x40
BTN_DOWN   = 0x80
BTN_POWER  = 0xFF

MAPPING = (
    BTN_UP,
    BTN_DOWN,
    BTN_LEFT,
    BTN_RIGHT,
    BTN_START,
    BTN_SELECT,
    BTN_B,
    BTN_A,
    BTN_POWER,
)

def decode_input(line):
    bits = 0
    for c, bit in zip(line, MAPPING):
        if c != ".":
            bits |= bit
    return bits
bk2 = zipfile.ZipFile(os.path.abspath(sys.argv[1]))
lines = [line.decode() for line in bk2.open('Input Log.txt')]
data = [
    decode_input(line[1:-1])
    for line in lines
    if line.startswith("|")
]
with open("bgb.dem", "wb") as f:
    f.write(bytes(data))