>So, what
> was keeping it from being emulated, was it some kind of encryption? Just
> curious.

Looks that way. Here's some old news from Guru's site:

8th August, 2004
I need a little assistance..... I've run into a small problem with trojaning the Crystal System PCB. We have the trojan code ready and waiting to be run. I assumed the BIOS ROM on the Crystal System was an EEPROM, but it turned out to be just an EPROM. Since it's a PLCC32 chip, it's not easily swappable with another (blank) EPROM and the one on this PCB is not erasable because it has no clear window. What I need is an old PC motherboard that has a flashable BIOS. The flashable BIOS on PC motherboards is just an EEPROM. I can then re-program that chip to run the trojan on the Crystal System to break the protection (which is absolutely necessary for in-game emulation).
Take a look at this pic....
Anyone have an old PC motherboard that has something similar on it and want to put it to a good use? Ignore this number since it's an EPROM. I need something either 29F010 or 28F010 or similar (020 and 040 are also ok) and it must be a PLCC32 chip like this one. It can be either socketed or soldered on. If socketed, it can be easily removed with a small screwdriver. If soldered, then send the whole board. If you have one, but not sure as to your chip type, just ask and I'll tell you if it's acceptable or not.
Please contact me if you can help. Thanks!


8th August, 2004
Here's some nice WIP shots of attract and game start in Crystal Of Kings, thanks to ElSemi :-)


Unfortunately, protection prevents in-game emulation working, but this is a great start!



RELAX and just have fun.
Remember, it's all about the games.
Mr. Do!'s Arcade