Once Hydro.exe kicks in though, this should get adjusted, so it's really a matter of seeing some scrambled video at startup vs. We are also worried that since the BIOS will see it as a 2D card, during boot, it will grab and use it, and probably output at 31Khz, and with the CRT being 25Khz, might be an issue for potential damage. I've ordered one on eBay so we'll see how that goes soon enough. In theory, it should since it is backwards compatible, but with the combined 2D/3D, not sure how Hydro Thunder is going to react since it doesn't expect that. One last thing we are checking for this mod is to see if a Voodoo3 card will work. WORKING: STB Systems 12MB (Voodoo2): I have come across no issues with it, ran through several races (linkinpark9812) WORKING: Metabyte 12MB (Voodoo2): - (DogP) WORKING: Quantum3D Obsidian2 90-2440 10MB (With security chip 546-0014-02) (Voodoo2): I have come across no issues with it, ran through 7-8 races (linkinpark9812) Video will not display since the security chip keeps the display off until it gets data (linkinpark9812) NOT WORKING: Quantum3D Obsidian2 90-2440 10MB (With security chip 546-0024-03) (Voodoo2): This is the original Hydro Thunder video card. (Attached to this post)ġ.1 - Optimized the Part 1 CPLD emulation code (reduced code size by almost 75%!) This is to let you know that this Hydro Thunder System is running with the "Security Bypass" patch.ġ.0 - Initial Release. There will be the text "S-" at the bottom of the screen between the code and data versions. On boot of the game, you'll notice on the "Game Startup Status" Screen has slightly changed. Make sure the display comes on and your Diego board responds (aka the lights stop flashing and you can control and play the game). After completing the patching instructions, save your new HYDRO.EXE and try to run your game with the video card you want to test (please read more about other video cards below). Shouldn't be an issue, as you shouldn't need this patch if you have the original card. Since this patch bypasses that, it never turns on. The card is kept off until the Security Chip/CPLD get the right codes. Funny enough, this patch will NOT work with the original video card (With the numbers 546-0024-03). As we've found out and fixed (thanks to DogP), this modification should NOT interfere with the linking to other unpatched Hydro Thunder's that are version 1.01b. The EXE you are modifying MUST be from a game system that has the 1.01b update. Then follow the instructions attached to this post EXACTLY as stated and DO NOT skip any parts and you should be good. You need to get access to your Hydro Thunder's Hard drive and open up the "HYDRO.EXE" file in a Hex Editor (kind of like a text editor). The instructions are pretty straight forward. UPDATE: One of the text files attached below has a link to the modified CHD and a password. If anyone thinks I can do otherwise here, please let me know. I could make this into a patch where I can send out the entire CHD file, or even just the EXE file, but I'm not sure if I can do this on this forum, or the legalities of that, so I just have patch instructions posted. I will be giving it a version number and updating it accordingly if needed depending on what other fixes may be needed. The instructions on how to do this mod are attached to this post. We are getting the Diego board to unlock itself using a 0014-02 card, with ONLY editing of the Hydro.exe file on the hardrive. SCRIPTS I WROTE AND USED TO HELP ME BYPASS THE CPLD: HOW IT WORKS/WHAT THE CPLD/SECURITY CHIP WAS DOING AND WHAT THE PATCH DOES: Here are some specific posts you might find of interest: Please check it out in it's entirety for cool information in how this Security Chip works and what testing we were all trying out/doing. I'm sure some of you have seen this thread: Since there was a lot of development posts there, I figured I'd open up a new thread dedicated for helping get this set up, as well as listing various video cards that have been tested to work. ***** I am NOT responsible if you trash your EXE, or anything else for that matter. Hydro Thunder Video Card Security Bypass Instructions: HOW TO and CHD Image File: Hydro Thunder Video Card Security Bypass
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