chemical decapping and four years of reverse engineering unlocks MechaCon

The ‘magic security chip’ inside the original PlayStation 2 has been successfully reverse-engineered and dumped. Canadian retro hardware and software enthusiast DiscoStarslayer was the manic mind behind the cracking open of the CXP102064 MechaCon chip, which arrived inside the ‘PS2 Fat’ from 1999. It took “four years of effort” to reach this stage, but this milestone should be a boon to hardware preservation, repair, and emulation projects.

The Mechacon got its name from its primary duty of controlling the PS2’s optical and flash drive mechanics. It also played a significant part in Sony’s game optical disc security, supporting “Magic Gate [memory card] and KELF file [executable] decryption among other things,” notes the PSDev Wiki. Unlocking the secret workings of such chips can be important to those involved in video game preservation. So, many people will appreciate DiscoStarslayer’s work in reverse engineering and dumping one of the PS2’s last remaining secrets.

As per the social media post, the arduous task of breaking the MechaCon’s security took four years. Some of the reverse engineering tricks utilized by DiscoStarslayer include chemically decapping the CXP102064 to expose the die, then using microscopes and optical dumping skills to analyze the silicon chip circuitry. In this case, a lucky break during the hacking apparently uncovered an exploit that provided a method whereby the chip’s data could be extracted through software.

With this achievement unlocked, the game/hardware preservation and programming communities can look forward to improved emulation and homebrew developments. It should also open up possibilities for replacing the aging optical drives in PS2 consoles.

Beyond the confines of PS2 Fat consoles, some social media commenters noted that the MechaCon was also used in a handful of arcade machines from the era. Specifically, the Namco System 246 and System 256, as well as the Konami Python 1, which used modified PS2 hardware, used the MechaCon firmware to authenticate security and allow the execution of encrypted game data.