Friday, May 15, 2020
Decapping is pure fun, fear and adrenaline
I decapped my last 8751H over 6 month's ago. So i was pretty excited when f250v contacted me for decapping a protected 8751H from his Street Figher (bootleg).
Read more about here.
He shipped the mcu last monday, i received it today and as i had a short period of free time i immediately started to work on it.
To be true, decapping a chip is pure adrenaline, a little bit of fear and in the end alot of fun. While it proved another time that my decapping method is working pretty good, it's always risky to decap a chip. (don't use too much heat / did i use enough polish / hopefully i did not accidentally cut a wire /...)
In the end it took about 15 minutes to open the chip, 5 minutes to erase the lock bit and after another 5 minutes we had the dump.
The next interesting fact was, that this dump matched the other existing Street Fighter mcu dump, which was just added 8 days ago to MAME (here). The previous dump was only possible, because an unsecured 8751H was found.
Anyway, this confirmed the existing dump!
Thx to f205v for sending the 8751H to me, it was nice variety to my currently other work.