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And now thanks to GadgetFreak and his ArcadeROMPatcher, it's now an R-Type Leo :D I know that's a bit of a cop out as it seems to be a common conversion, and I really enjoy the In the Hunt art style much more - but it's so damn difficult, but I had purchased two Pound for Pound boards earlier...

Thank you for everyone who provided ideas/guidance with my issue! Here's some photos of the fix. Hopefully it can save someone else some headaches. The scuff with the broken trace looked originally like dirt on the PCB (as it was VERY dirty), but I started scrubbing things down with a very soft...

OK. I'm exhausted, I'm sweaty (mostly from reflowing the SMD chips and making all sorts of ahhhhhh noises as my brain couldn't process the directionality of my soldering iron drag vs. the orientation of my very limited microscope), but the board is fixed. Will post shots tomorrow. But no more...

I'm no closer to a solution and I've socketed all the ram and a handful of 74LS273N's as they seem to have failed in multiple other repair logs from various folks. Still no dice. Got my crap capture setup out and Youtube compressed the video to hell, but it demonstrates the consistency of the...

Agreed. I was just testing to ensure that it wasn't a power supply issue due to my picoatx powered setup clearly being insufficient. The manual allows for a tolerance of 5V+/-5% and 12V+/-10% (although I know that doesn't speak to amperage). I'm pretty sure I'm not suffering from voltage drop...

I just swapped out the PALs on the B board with GAL16V8B's programmed with JED's from the PLD archive. Still the same... :-( I have various RAM chips on order. I'm guessing I"m probably going to socket them/replace them and still have this issue X/ But with the relatively clear graphic...

Thanks for that information. I did get cued in to a potential voltage issue as my test bench setupp in my mini-electronics shop in my garage is powered by a PicoATX power supply with a 19V laptop adapter. It works for the majority of games (although no -5V), but it wasn't enough to get the M92...

I recently picked up a ROUGH Irem Skins Game (from the roms, it's Set 2 in MAME) M92 board. This is the US version of Major Title II. Eventually I'm going to do a conversion on it, but I want to get it up to speed first. Some small, fuzzy mammal definitely made a home in between the two board...

I'm making progress. I ordered a LP-560 logic probe. It will probably take me a long while to get up to speed on how to reference schematics/data sheets and use it. However, what I lack electronic signal skill, I seem to have been able to make up for with physical grunt. Between my hot air...

In case anyone else runs into this ROM Board variant in the future, I wanted to share that I was able to successfully convert it to a Ray Force (and my Puzzle Bobble 3 -> Ray Force is now a Puzzle Bobble 3 -> Elevator Action II :D mostly because EA2 needs IC39 for sound and I didn't want to...

I have a T-Unit (NBA Jam) that I'm trying to fix up. After swapping in known good ROMs, PALs, CPU, and FPGA chip I got it to boot but the graphics are fuzzy/crunchy looking. It looks like a RAM issue to me from other boards I've dealt with RAM issues on, but I'm pretty sure the video DRAM is not...

That makes sense. There are no Taito logos on the board, but the name Taito does appear twice and there are some D77 pals on the board - so I'm not sure where they would have been sourced from. It looks like an awful lot of effort for a F3 bootleg to have the board labeled and be using...

OK - I can verify that this rom set is bubblem from MAME. It's just split over separate roms and interleaved. When deinterleaved and the separate data chunks are combined, it's a bit perfect match to the known bubblem set. So it's nothing new or special. However, I'm still totally perplexed by...

Even weirder. This Japan region cartridge came with a Japan region F3 mother board, but the version of the game's test mode is 2.4O. Date stamp matches the v2.4O in MAME. However the MAME Set is 13.5mb across 13 ROM chips and this dump with 27 ROMs and is only 13.0mb. I've been trying to...

So I popped open my Japan-region Bubble Memories cartridge and got a bit of a surprise: The cartridge always struck me as a bit weird as the label on top is too wide for the plastic indentation. I was expecting a more traditional board layout, but this thing looks to be all 27C4001 512kb...

Thanks to both of you for the feedback. I actually gave this a try last night and did not yet have a chance to post. M XGecu T56 definitely doesn't like the new old stock PALCE16V8's that I got :-D It seems to be able to read them without an issue (but they're blank), but can't program them as...

This is probably a very ignorant and uniformed set of questions so my apologies up front. However, I'm going to be attempting some Taito F3 cartridge conversions and I'm not sure if I'm going to need to create D77-14 and D77-15 ICs for mapping of the various ROM sizes, but in the event that I...

Thanks for the feedback on that. It's a good possibility. These old components seem pretty hardy. I might bust out the air compressor for this task :-D

I have an Atari Dig Dug board that's a bit rusty and crusty. The PCB looks fine but a lot of the DIP chips have corroded pins. When I initially got it, it wouldn't boot. I've slowly been getting it back to operational order, but my troubleshooting skills are limited. All of my ROM chips should...

Picked up a MK II PCB knowing it was broken as something to provide a challenge to learn how to troubleshoot a jamma pcb. Was it a smart move? Probably not, but hopefully I can still make it into a good learning experience. I do not yet have an oscilloscope, so I haven't done any testing of...