Demon Front is unfortunately sold out. Questionable whether or not you can get them cheaper than ebay in my recent experience, but wouldn't hurt to ask.
yes, unfortunately when I asked they were not available. On the other hand, I have only seen the Demon Front (catridge no pcb) on ebay for around 500-550 usd, so ebay would not be a viable alternative for me
I also realized another problem, the DDPDOJ cart has a visual glitch when the attract screen cycles to show scores.. I'll attach a photo of that here too.
I have a Knights of Valour Super Heroes cart and would like to convert it to DDP.
I own a T48 eprom progammer with some adapters and already flashed the necessary 27c322 eproms. But my problem is with the 26L6420 eproms (SOP44). It's not listed in the T48 software I use (xgpro) so I may need a special adapter or to find another way to flash them. I spent a long time on Google trying to find any infos about 26L6420 eproms flashing but no relevant results. I also looked ar buyicnow but 26L6420 are only sold with a support, not bare.
I would really appreciate to know how did you flashed these eproms so I could do the same. Thanks
Rather than converting another cart into DDP, use one of @Fluffy 's cart PCBs instead. It's all 27C322 EPROMs and supports all three of the Cave games.
I have a question about these conversions, is it possible to have the arranged versions on there as well? I think I read somewhere in here that you can install a switch.
I have a question about these conversions, is it possible to have the arranged versions on there as well? I think I read somewhere in here that you can install a switch.
I have a broken Lydz Ketsui bootleg that I'm trying to get working again. (...)
The general problem is that the board does not seem to meaningfully boot; I just get garbled graphics and intermittent video desync, almost as if it is 'boot looping' or resetting itself. No blind play, sound, or other indication that anything of substance is happening. The motherboard is known working, including with other Lydz boots. From this I've inferred that it's probably an issue with the Program ROM or its path to the motherboard.
I found these posts interesting, because I seem to have the same problem - got a Ketsui bootleg that looks similar to this one, and it just boots into green garbage:
I bought it like a year ago at this point, but I chalked it up to my shady aliexpress PGM motherboard since I didn't have other games to test it with, but I since tested it on an original PGM cartridge (Knights of Valour Plus) and it seems to work just fine, so I'm starting to suspect the cart. Here's the pictures of the boards I have:
There is one major difference though, mine seems to have a flash chip instead of an 27C322 EPROM (it has a wire from the middle pin on the bottom row to the top right pin, it's hidden under the chip), and corresponding resistor arrays are not populated. Also, I don't have any electrolytic caps on my boards either.
... so basically, I'm strongly tempted to try and attempt a similar repair myself, I have a T48 programmer now (which should handle the GALs if I'm reading it right, and it should handle 27C322 with an adapter I also have if that ROM is bad), but maybe someone else has another suggestion? Or is there something else that seems iffy on my boards? Not gonna lie, it would be kind of replicating Softdrink's repair blindly (unless I do some serious reading up), but I'm curious if you guys think it's worth trying.
.. and before you ask, yes I tried contact cleaner on the cartridge slots, isopropyl alcohol on the contacts, wiggling and resetting, nothing really makes that cart boot (and kov plus boots every time no problems).
Right, but as far I understand the previous discussion, I think no one actually has the GAL dump that is correct for this particular bootleg, so I would have to bodge in some wires to use the GAL that Softdrink used for the repair? Or has that changed since then?
Comes up world version and story, names, and highscore input is in english. After about a minute into demo or in game play I get this error. I've burned it several times with same result on two different eeproms. I've run the X delta against the mame rom same result everytime.
Original Chinese v100 works fine. So no English text.
My current working collection:
Oriental Legend (China)
The Killing Blade (China)
Oriental Legend Special/Super(China)
DoDonPachi II(China patched to World)
Knights of Valour 2 Plus: Nine Dragons(China patched to World)
Puzzli 2 Super(China)
Demon Front(China patched to World)
DoDonPachi DaiOuJou Black Label
Espgaluda
The Gladiator(China)
Ketsui
Knights of Valour Superheroes Plus(China)
Oriental Legend Special Plus(China)
The Killing Blade Plus(China)
Spectral vs. Generation(Taiwan)
Right, but as far I understand the previous discussion, I think no one actually has the GAL dump that is correct for this particular bootleg, so I would have to bodge in some wires to use the GAL that Softdrink used for the repair? Or has that changed since then?
Well, that makes sense. I attempted a repair today, starting with easy stuff (missing capacitors, pullup resistor, then swapping the EPROM and populating the resistor arrays) and none of this made any difference, the only thing I didn't do is the new GAL (don't have the new chip for it yet).
I did actually manage to desolder the one on the cart (PALCE22V10H) and attempted to dump it with my T48 programmer but I was unable to - when selected the "GAL22V10" mode it just returned an "overcurrent protection" error, and when selecting "ATF22V10" device it just returns all "1"s, but I've never done this before so I'm not entirely sure I know what I'm doing One more thing pointing to a fried GAL is that out of curiosity I tried the cart after I desoldered it, and the pattern of garbage on the screen looks the same to me.
PAL/GAL have a "protection fuse" that is usually written at the end of programming. While it is set all reads return "1", except for a few signature bytes at the end of the fuse map on some devices that can be used to identify the program.
If the PAL/GAL is completely combinatorial (i.e. doesn't use the latch) you can dump it by treating it like an EPROM. Connect the address lines to the inputs, the data lines to the outputs, then read it. You'll get the truth table for the GAL, that you can then resolve back into equations.
So good news: programming the GAL and repeating Softdrink's repair actually made the cart boot!
Bad news: I think I managed to snatch defeat from the jaws of victory anyway On my first try after I put the cart back together there was no picture at all and supergun dropped to 4.7V which made me immediately suspicious and I turned the power off, quickly disassembled the cart and noticed the bottom board was really warm So I'm not sure what happened, I either shorted something or maybe put it in backwards and didn't notice, but after inspecting it visually, checking for shorts and finding nothing wrong I risked booting it again and it actually did, but graphics and sound are garbled:
So I'm guessing I damaged the bottom board, adding capacitors across the regulators didn't change anything.
Well I think that was fun and I guess technically I improved the cart since it's actually playable (just an assault on the eyes and ears), but that may be the point where I give up and consider this a nice donor shell for a proper reproduction (anyone have Fluffy boards for sale? ) Unless someone has other suggestions to try.
One more thing pointing to a fried GAL is that out of curiosity I tried the cart after I desoldered it, and the pattern of garbage on the screen looks the same to me.
