Hey guys. I picked up an absolute steal NEOGEO AES during my Japan visit for an absolute bargain. Problem is, it’s loose. I’m absolutely stoked to see a serial this low.

Is this a super collectible thing to have a low serial? This looks to be just over the 1000th neo geo made for Japan?

I bought it loose so I plan to pick up a NeoCD controller, hd Retrovision Genesis adapter, and a power supply.

It looks like 5V DC, 3 amp center negative brick is what I’m after.

What gotchas do I need to look out for with this bad boy?

Thanks in advance :)

Spent sone time with my son yesterday playing MSX. Such a great game. I still like the second one too though even if it has those nasty slowdowns

Hey everyone, so I wanted to play Metal Slug with a friend the other day, popped in my NeoSD Pro and when I loaded the ROM up, it was weird, like only the background layers loaded and no sprites. I tried cleaning it up, but to no avail. So today, I opened up my cart, cleaned the pins good, and now it's even worse; it won't even load the main menu of the NeoSD Pro!! All my other official Neo Geo carts work fine, so I know my AES is not the culprit. What should I do, this is the single most expensive item I've ever bought for my game collection, and I can't afford another one!

Hello, I recently purchased a second hand neo geo Omega and the cartridge doors are somewhat loose/floppy. Sometimes they won't fully return and are stuck in a halfway position. Where can I find replacement/stronger springs? Looks like it could be the same springs as the cartridge door for the AES?

Hello.

I'm working on a game engine and game, the "master version" is for the Sega Genesis/MegaDrive and will be released first, and I'm considering a NeoGeo port.

The codebase maintains init code and I/O lib for each target, separate and then linked with the gameplay code and resource data which is also separate.

Most I/O, target-specific (such as raster effects) and time-consuming (such as particles) code is written in ASM, but most of the gameplay is written in C.

As for the NeoGeo, I've just read the dev wiki at a glance (which is amazing by the way!), it's quite a lot to digest.

Sound driver

I don't know almost anything about sound in a general sense. I couldn't build a note-to-hwPitch table by ear alone. Music is made in MIDI files using the "SMPS MIDI Driver" as soundfont, then the files are converted for the game accordingly.

Is there a good option for NeoGeo sound driver? Or... is NeoGeo capable of playing exactly what YM2612 can do (aside of available channels)? If so I can ..attempt to adapt a Z80 MD driver for NeoGeo

PSG tone vs noise

Is it really 3 PSG tones + 1 noise, or, 2 PSG tones + 1 switchable tone/noise?

ADPCM drifting

The contact between my MD and a cart has definitely never been nearly as stable compared to my pc motherboard and a RAM stick. Hell, I have fond memories of many famiclones struggling to read CHR correctly unless the user giggled and blowed on the cart until seating it just right, yet PRG didn't seem nearly as affected. NeoGeo's cart port stability, does it compare to a PC RAM or a MD cart? lol

Wiki claims ADPCM is prone to drifting, but just how much? Is it a good idea to split seconds-long samples in intervals, reset more often?

Video

From a quick glance, it looks like software rendering is only possible on CD, very slowly. Because the graphics are stored uncompressed into a separate ROM. Looks like a cart-side issue though... ? I'm not a hardware expert, but what prevents a cartridge to feature RAM instead (with "some way to write to it"), even if that means storing graphics with the program (with compression if needed)? Is a tiny fraction of data loading time a letdown, or is it done by design to skip having "some way to write to it"?

I'm not a gamer at all, I just tend to take a few particular games and overanalyze them; One particular trend I noticed, is instant cuts between screens (sometimes no more than only 1 or 2 "unfinished" frames?). Is it deliberate, or just a matter of "I just want this feature to work ASAP"? Contrast to MD, where it's common to fade to blank for transitioning or outright disabling display to hide the maany unfinished frames, aside exceptions but these are deliberate and purpose-designed for each situation (depending on the overall image composition or how are video regs set or VRAM laid out and so on).

Without being able to write custom graphics in run time and only being able to flip and shrink but not rotate, does it mean that it's impossible to draw any mode7-like effects such as the tracks from Mario Kart?

Is it possible to achieve any sort of sprite transparency, or anything that looks like it? I imagine I can lay sprites on top of others following the shapes I want on top of it for each, make them "invisible" by setting their palettes to underneath's contents accordingly, and transition to the target colors in order to reveal the new graphic. Static and must not move though.

Thanks for reading.

The controller I was using with my Neo geo was working perfectly, but then one of the micro switches broke. I tried to buy more on eBay but they are junk and the stick feels loose and doesn’t click. I already returned two of them. Both were on different ends of the price scale. Just want a reliable one. Not interested in soldering new switches. Is there a platform other than eBay to shop?

Finally, I got a mint full kit, thanks to a good friend! FFM stabil

Level Design:

Last month (August 2025), the developer reported that level design was well underway. Now in September 2025, the developer tells us that he's finished the first pass in creating these game levels: City, Bridge, Airport, Bunker, Forest, Beach, Cyber Punk, Castle. The current level being designed is: China. He estimates that he'll have finished the first pass of designing all levels by mid-to-late October 2025. Designing levels for Shadow Gangs Zero is a multi-pass process involving three primary passes plus a polishing phase. Lots of work, but the developer is making great progress.

Mini Bosses:

The final campaign stretch goal is the inclusion of six mini bosses: Fire-breathing dragon, Military helicopter, Cannon wall with heavy firepower, Van with armed fighters, etc. To achieve that stretch goal, the pledge total needs to reach £120K. We are so very close to reaching this goal, as the pledge total is currently at £112K.

Flash Carts:

A couple of months ago, I reported that the Neo Geo digital version is compatible with NeoSD PRO, as the developer is personally testing the game with it throughout development. Since then, a new backer named Kujako has come aboard and will help with testing for BackBit compatibility and DarkSoft Multi MVS compatibility. Why all the fuss about Neo Geo flash carts? Because Neo Geo is the lead development system and flagship version, so the developer wants to make sure that each and every one of you Neo Geo fans can play the game!

Beta Testing:

Speaking of testing, you already know that backers will have access to the Neo Geo digital beta release. I've received confirmation from the developer that ALL backers will have access to this Neo Geo beta release. In other words, even backers of the Mega Drive / Genesis, Dreamcast, PS5, Xbox, Switch, and Steam versions will be granted access to the Neo Geo beta. Granting broad beta access will help the developer iron out all bugs, while giving backers early access as a loyalty perk. A win-win for everyone!

Ongoing Pledges:

So far, 81 backers have pledged for the Neo Geo digital version. That's awesome! We're hoping the campaign can reach 100 backers for the digital version by year's end. Could you help make that happen? If you haven't yet pledged, please take another look at the campaign page to see if you'd like to add Shadow Gangs Zero to your Neo Geo digital collection. If you've already pledged, please tell your circle of friends about the game and invite them to join the SGZ community.

As for Neo Geo physical cartridges, there are 127 of you who have backed it. Wow! If you've got friends with similar great taste in Neo Geo carts, please tell them about the campaign. A reminder that all backers of the Neo Geo physical cartridge will also receive the final digital version for free. Perfect for playing SGZ on your portable devices when you're away from home!

Shadow Gangs Zero - Campaign Page:

https://www.kickstarter.com/projects/jkmcorp/shadow-gangs-zero

King of Fighters 2001 King of Fighters 2000 Brand new and unused. There are 13 of the year 2000 and 9 of the year 2001 left. All are genuine and original, but without the paper boxes.

I just bought a neo geo mvs 4 slot and the screen has vertical lines and is dim. I would love to get the crt back to working perfect again or worse case put a unico screen it. Does anyone know what route to go and if the unico is a plug n play or not. Ive read some forums on how the neo geo uses a diffent type of video connector than cga.

CAN I solder the individual switches? Sure. Do I WANT to? Hell no.

Would be nice to be able to use Sanwa JLF-PCBs as a drop-in for OG sticks... and very soon, anyone should be able to! Took a little modification of the OG metric-replacement parts, but it now fits beautifully, solidly, etc. - only might need to change alignment of the retaining pins to make sure it actuates evenly. Still, this is huge IMO.

Original style mvs 1 slot. This thing is starting to make me pull out my hair. It's stuck in the cross patch pattern. Now allow me to explain what's going on with it. I bought this unknowing what the condition was. I also bought a cartridge for real cheap and found that the cartridge didn't work. I have since replaced the battery since it was leaking, and replaced the crystal that was adjacent to it.

Recently I also purchased another one slot motherboard but the smaller version. It is working fully and all the cartridges that came with it are working as well.

So I tried the new cartridges in that old motherboard and they don't read period all I get is that cross patch Period however if I put that old cartridge in that's not working I can get Garbage on my screen Period so now I'm pulling out my hair because I don't know what's causing any of this and I'm not sure what is responsible for reading the cartridge. I've looked inside the cartridge slots and I don't see any Grime inside of the connector or anything that was suggest corrosion or damage.

So can anyone tell me what chip is responsible for reading the cartridge on that old motherboard and what I can start looking at and checking? I'm unsure of how exactly to go about doing this. I know my voltage is good I know all that

Go check out this game, lots of fun so far! https://ozzyouzo.itch.io/double-dragon

Hey, Recently picked up a 161 in 1 cart for my cabinet just so I don't have to swap carts as much (my kid wants to switch games every 15 minutes). I wanted to try the PICKnMIX because I do not really enjoy the original 161in1 menu.

When I boot up the system I hold the P1 start button and I release it when I see the unibios logo. Then I get a black screen and a popping sound from my speaker. Nothing else happens. I have tried waiting for 5 minutes but it stays on the black screen forever.

Anyone who can help me?

I have modified many USB computer joysticks to fit the Super Gun and MVS home consoles. They have all been very reliable. It's actually quite simple. You need to understand the 28jamma pinout. Even you just need to solder the wires onto the original PCB of the joystick, and this won't interfere with your use of USB on the computer. I have also modified several controllers, such as Sega game controllers, Saturn game controllers, and even the Mini wireless controllers. Of course, I still prefer the joystick the most.

Moreover, I also modified the lower part of the LCD-displayed Moonlight Box arcade machine to create a MVS game console that integrates a joystick controller.

I am currently evaluating which collection I should discontinue and get rid of, as I no longer see the necessity to collect both AES and MVS. My concern is that I have had my AES since the 1990s, and I'm a bit emotionally tied to it. However, MVS is more cost-effective. What would you do?

It took me four days, working around the clock, to finally complete 30 sets of OMVS. Four sets have already been sent out. The surface mount capacitors were too small, so I had to solder them all by hand. It was really tough. I made a few extra ones because of the defect rate. I tested them all and marked the faulty ones. I'll fix them when I have time. I'm so exhausted. I feel like I could sleep for 24 hours.

I have a KOF 2002 romhack project, called KOF Ultimate Remix, which will feature:

• New character tweaks (buffs and nerfs for each)

• New mechanics (if you want, you can chat)

• New stages

• New characters

• Themes for each character/team

• New moves (command, DM, SDM, and Hidden)

• New sprites (some new outfits, new animations, and some fanservice, with an animation for some female characters' clothes ripped off after defeating the old KOFS)

• A story mode, if possible

• Also, LUA Trials for combos and challenges

We are looking for programmers for the project, although the search is impossible due to the fact that there are no more romhackers available at the moment. The link to the project's discord is here:

https://discord.gg/yq9TPVQ4FD

And there, we will talk

Hi all, have had this MS3 cart for a while now, worked for a while on location. We swapped it out and left it alone for some time, when it came time to test the cart again we ran into this issue. Testing on a confirmed working MV1A. I understand that the daughterboard version of MS3 is trouble, but would appreciate any advice you all would have.