Monday, May 1, 2017

Decap #139 replacement: Mortal Kombat 4 U76

A bit back we processed PIC16C57 samples and discovered#139 (Invasion U76) was partially defective as received. We knew this before decap since PIC16C57 allows reading a 4 bit XOR of the 12 bit flash worlds even when protected. Unfortunately, only 2/4 word bits changed in the protected readout and only 3/12 word bits changed in the unprotected version.


Like Invasion, Mortal Kombat 4 is built on the Midway Zeus platform. With this in mind, a team member donated U76 from Mortal Kombat 4 to process as a replacement. Label off:



And here's it with the main EPROM masked against UV light:


Which allows safely erasing security fuses like in previous posts.

Stay tuned for our post on identifying and extracting #145 (Croupier)!

Enjoy this post? Please support us on Patreon! Note: with the Indiegogo campaign over we unfortunately don't currently have a way to accept one time donations.

Posted by at

5 comments:

  1. UnknownMay 1, 2017 at 2:08 PM

    From an emulation standpoint, what does decapping and dumping this chip accomplish?

    ReplyDelete
    Replies
    1. erikMay 5, 2017 at 11:47 AM

      It accomplishes more correct and better emulation.

      Delete
  2. f205vMay 1, 2017 at 11:48 PM

    Great Job!
    this was really needed since a very long time.

    ReplyDelete
  3. Gore DaimonDecember 1, 2017 at 5:07 AM

    Have you checked this? Is the same protection?

    http://www.flipprojets.fr/SecurityChip_EN.php

    ReplyDelete
  4. zarihzJanuary 8, 2019 at 9:49 PM

    Drive website traffic ''https://seosolutionz.yolasite.com/'' Drive more traffic to your website has also initiated an ultimate SEO package. This package fits in the category of guaranteed quality package. This package provides everything that one could wish of. Our company’s major target is to serve small business owners.

    ReplyDelete

Subscribe to: Post Comments (Atom)