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Sega Model 2 / 3 hacked romsets?

I've been wanting to develop a ROM hack for Wave Runner that inverts the potentiometer data for the Throttle so that collectors can easily swap the game into a standard driving cabinet (Sega Rally, Indy 500, etc.) without having the need to swap 5V and GND to pots.
The reason for that is because I have one particular racing wheel I modified that only allows me to use one common ground inside the wheel attachment itself without cutting any of the original harnesses off (Thrustmaster NASCAR). I wired that ground from the buttons into the pots for gas and brake and daisy chained them. If I were to swap them I feel like I could damage my potentiometers since +5V is being shorted to the button GNDs. I know the game has two program ROMs (IC 15 and 16) but I don't know which one stores the data for the pots... I've tried accessing them using MAME's debugger but had no luck. Wonder if someone can hint me out.
 
Woodpross3r (ConversusWV) said:
I know the game has two program ROMs (IC 15 and 16) but I don't know which one stores the data for the pots... I've tried accessing them using MAME's debugger but had no luck. Wonder if someone can hint me out.
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The answer is both. As you can see here. It reads everytime 4 bytes (32 bits) 2 bytes of each rom: https://github.com/MisterTea/MAMEHub/blob/master/Sources/Emulator/src/mame/drivers/model2.c#L4520

So once you know what to change, see if you are lucky and only affects one Rom or if it accepts both.

Good luck!
 
After inspecting the program data from its respective supported emulator with the help from the author, I present to you Emergency Call Ambulance program ROMs that work without the drive board! Currently Japan and Export only. PM me if you want a US one. Later I'll edit the link with the US one.
This tricks the software into thinking the drive board is connected, which warrants much faster boot time. So far I've tested it on the Japanese version and Supermodel with the Export (Thank you Bart!)
This is for people using driving cabinets or modified wheels that don't have force feedback or the drive board.

https://www.mediafire.com/file/ugc17arsgjjjl35/ECA_patch_%28JPN%2C_EXP%29.zip/file
Depending on which region you use, you only use one IC17 for this patch. I have them labeled for neatness sake.

Enjoy and let me know if there are any issues. Curious to know if the force feedback still works if this patch is used in a real cab.
 
Tailsnic Retroworks said:
Has anyone the decrypted files for Spikeout and Spikeout FE? I have seen a few rom boards of these games without their encryption board, it hurts so much, xD
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Would be interested in this, too. I have not actually tested my Spikeout FE, nor do I remember if it has the security board 😩
 
me too I'm waiting, I have a Spikeout: Digital Battle Online with this security PCB, and I would like the update in FE :love:
 
I want to ask if there are also decrypted binaries for L.A. Machineguns and Emergency Call Ambulance. It pains me so much to see so many spare game boards without their encryption boards.
 
Hi, I'm also looking for modded roms for Ocean Hunter.
Maybe someone who knows how to work with Mame files and has a rom programmer could modify these roms for use in games that use the security board.
Two games have been deciphered so far

Daytona usa 2
Dirt Devils

It is possible to compare data from Daytona usa 2 Game (4 Epr ) encrypted and unencrypted and similarly change data in games that are not yet hacked?(.
I don't know how to work with this data, it just occurred to me..

Tailsnic Retroworks​

Thanks for sharing new game dump Manx tt Deluxe, they were just added to mame 254:).
 
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sonic323 said:
Hi, I'm also looking for modded roms for Ocean Hunter.
Maybe someone who knows how to work with Mame files and has a rom programmer could modify these roms for use in games that use the security board.


Tailsnic Retroworks​

Thanks for sharing new game dump Manx tt Deluxe, they were just added to mame 254:).
Click to expand...
Well, I added one eprom of that version, but at least is an addition, xD. Many thanks
 
Does he....? I tried to message him years ago, and he ghosted me, but it was about changing the security board into one that can be used for FV2, but I asked about this after he tried to offer that AND burnt ROMs. Do unencrypted ROMs mean that you don't need a the security board at all? Will this work on any Model 3 Step 2.1, or does it need to be Step 2.0? I can't imagine FV2 working well on Step 1 or Step 1.5.
 
and it can run without the security module or do you need one of some game? I'm sorry if I am repeating myself, but it's just amazing that no one even posted pictures or videos of any of this. I'm also surprised that there is not segmented multi for this. Even if it is for a few games, I am sure that people would pay to have this.
 
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TechnicalMonkey said:
and it can run without the security module or do you need one of some game? I'm sorry if I am repeating myself, but it's just amazing that no one even posted pictures or videos of any of this. I'm also surprised that there is not segmented multi for this. Even if it is for a few games, I am sure that people would pay to have this.
Click to expand...
Yes, the reason to decrypt the roms is to play the game without the security board. I also hope there will be a mutli for model2 or model3 at some point, but that's because I have one of each motherboard that I'd want already. I don't think it's a very collectable system because of their bulk, and the motherboard/generation fragmentation. I think you'd need Model2, Model2/abc, model3 (so 3 multis) and a mix of those motherboards depending on what games you wanted (so probably 4-5 motherboards). I do think the model2 multi would sell a couple dozen though, if it worked with any of the motherboards. You'd still be restricted to whatever romset your motherboard could support.
 
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