ocornut / decocase Goto Github PK

Tools for DECO Cassette System (デコカセ)

for Game Preservation Society ( http://gamepres.org )

https://en.wikipedia.org/wiki/DECO_Cassette_System "The DECO Cassette System was introduced in December 1980 by Data East. It was the first standardised arcade system that allowed arcade owners to change games."

Current status:

Decrypt type 1 game data

• Input: raw cassette dump (.bin) + PROM key (.rom) + optional dongle settings
• Output: decrypted cassette (.decoded.bin)
• Brute-forcing dongle settings if not provided, verify correct settings by re-encrypting

Encrypt type 1 game data

• Input: decrypted cassette dump (.bin) + PROM key (.rom ) + dongle settings
• Output: encrypted cassette (.bin)

Decrypt type 3 game data

• Input: raw cassette dump (.bin) + PROM key (.rom)
• Output: decrypted file (.decoded.bin)
• Brute-forcing bit swap settings (among 11 combinations supported by MAME - perhaps some are missing? seems ok now. some brute-force bigger space)