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    Killer Instinct Dual Board

    I certainly understand the desire for a plug and play adapter, but just to note, if pin 1 on the sound ROMs is jumpered to A19, most (all?) 27C040s will still work if reverting back to just a single game, since VPP is usually/always a "don't care" (will function correctly if either high or low)...
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    Killer Instinct Dual Board

    Very nice! I think it's possible, and probably not too difficult with a bit of reverse engineering. The sound ROMs have SMT jumpers next to them (JP1, JP2, etc), which connect to pin 1 on the EPROM (A19 on a 27C080). The jumpers are currently set to connect pin 1 to VCC, but if they're moved...
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    Killer Instinct Dual Board

    If you change jumper JP30, don't you get the full 8Mbit EPROM mapped into memory? Wouldn't that be sufficient to do multi-boot, rather than bank switching two 4Mbit EPROM images on an 8Mbit chip? Especially since you've rewritten the decompression... don't you just need sufficient space to...
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    Killer Instinct Dual Board

    Great work @neku ! Definitely not me... not surprising, other than how long it took for it to happen. DogP
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    Killer Instinct Dual Board

    No, I haven't had time to dig back into the code to make that mod. It's definitely on my "list", just hasn't made it to the top of the list yet. DogP
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    Killer Instinct Dual Board

    Looking really good, guys... glad to see this hack getting some use! DogP
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    Killer Instinct Dual Board

    Sorry, I got sidetracked and haven't gotten back to check this... are you still having those issues you mentioned w/ coining up? Great to hear! Heh, I actually started the mod to make KI1 run on a dedicated KI2 PCB (it's booting, but not fully working yet), but I've been sidetracked on a...
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    Killer Instinct Dual Board

    I have tested without Free Play, though not extensively... I don't remember any issues like you're referring to, but I'll plug the board in again this weekend and look more carefully. DogP
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    Killer Instinct Dual Board

    Hmm, I never paid much attention... but the red screen flash isn't normal? I mentioned in one of my previous posts - this may not work easily. When I tested this, switching with a warm reset didn't seem to properly switch the hard drive. I didn't track it down... I kinda suspect the...
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    Killer Instinct Dual Board

    Nice, glad it worked out for you! Have you (or anyone) played all the way through KI2 using the hacked ROM yet? Just curious if anyone's confirmed that the hack is bug free... I've personally only played a few rounds. DogP
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    Killer Instinct Dual Board

    I'm not working on a plug and play dual board to sell or anything... mostly I was just interested in how the protection worked, and wanted to document it. Regarding your question about modifying the board... like twistedsymphony said, you shouldn't need to do any real mods to the board. To...
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    Killer Instinct Dual Board

    I haven't personally tried, but I believe U96 is the only difference (plus ROMs and HD of course). DogP
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    Killer Instinct Dual Board

    Are you sure they're dedicated KI PCBs and not KI2? From the pic you posted, it looks like your U96 has 20351 (KI2) instead of 19489 (KI). This only works on dedicated KI PCBs, because the dedicated KI2 PCBs remapped several addresses (and running the wrong one does exactly what you're seeing...
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    Killer Instinct Dual Board

    Are you sure the IPS patch applied correctly? The CRC32 of the patched file should be: 0x94430421. I started with the "Killer Instinct 2 (Conversion) U98 Any-IDE Boot ROM L1.4" file from: https://www.thekillerinstinctproject.com/?p=55 . DogP
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    Killer Instinct Dual Board

    It looks to be a raw access kinda thing. I was thinking the same thing about getting both on the same drive, but I think it'd be a matter of concatenating the raw disk images and putting an offset in everywhere in the code that accesses the disk. So again, probably very tedious. ;-) DogP
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    Killer Instinct Dual Board

    Here's an IPS patch for that simple mod I was describing. You'll want to patch the KI2 conversion Any IDE ROM. This should run KI2 on a KI1 PCB w/o the conversion board. Of course it should make building a multi KI/KI2 much easier as well. I tested it and it seems to work, though I'll admit...
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    Killer Instinct Dual Board

    OK, I think I got this figured out... slightly more complex than I expected. I ended up writing several test ROMs (MIPS assembly, ugh) to put it through a bunch of well defined states while watching the data on the logic analyzer, rather than just watching the random data presented by the game...
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    Killer Instinct Dual Board

    I'll post once I've got it emulated "properly"... right now I just have a patch that works, but I don't think is how the hardware actually works. Since the dedicated KI2 already works, it only makes sense to emulate the protection if done accurately, so I'm going to hook up the logic analyzer...
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    Killer Instinct Dual Board

    Nothing I can do huh? ;)
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    Killer Instinct Dual Board

    Yeah!
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