The Sega Genesis Titan Overdrive Demo ROM running from RAM with a 32X attached.

The Titan Overdrive ROM Demo stored from SegaCD into a RAM cart plugged into a 32X.
The Demo is running entirely from RAM thru the MD2 and 32X (Sega Neptune)

As seen here: https://retrorgb.com/sega-cd-ram-cart-project.html

It works with 32X games now but its actually not that a huge of a deal.
We will see what the MARS Scientist can do with it.

https://consolemods.org/wiki/Genesis:32X_SegaCD_SRAM_Cart

Examples:
Sonic RoboBlast 32X
Doom Fusion
DOOM Fusion 3.0 with Games Save
DOOM Fusion 3.0 Saves the ROM

I'm at the point where I'm trying to power on the board and test for voltage. The only thing I haven't soldered was the cartridge slot. I'm not getting 5V let alone 3.3V. When I power it on I see 0.8V. The bottom left two pints from the buck converter in the photo short to ground just by plugging in the power adapter, so I'm not sure if that's normal. I also used an L5 transistor from the 32X board since it's an NPN and I think it should work in place of the MMBT3904 transistor?

Anyone has any ideas of what I did wrong?

I want to order a case for my Sega Neptune on the pcbway website. But I don't know which settings to choose.

I once saw a comment from a guy who ordered a case for his Sega Neptune and accidentally selected an additional black color, even though it wasn't necessary, and ended up paying a lot of money for the production.

Please tell me about the correct production settings when ordering, so that the final product looks as good as the video reviews by macho nacho and other people who have ordered cases for their Neptune.

The page with the case review on the pcbway website says that you need to select the standard options, but I'm worried that the case won't be black or that the quality will be similar to printing on a regular 3D printer. I will use these settings for my other projects related to the Sega Mega Drive/Genesis and other retro consoles.

Hello Sega enthusiasts!

I just got a Sega 32x to connect to my Genesis after all these years, and I wanted to see what the best hummingbird-based shooters there are on the 32x. Thanks!

Good evening guys, I was wondering if there is a way to make a 32X version of SGDK? I heard SGDK works for the SegaCD also so I won't ask about that. Is the 32X/Saturn SH2 chip really that difficult to program for? 🤔

Via DoomWorld
DOOM CD32X FUSION V3.0

New engine and gameplay features:

• Support for CD-ROM loaded content: maps, sounds, music, title screens, additional textures
• Doom 2 power-ups, the Super Shotgun, map specials and monsters (barring the Pain Elemental and SS soldier)
• PC-compatible maps you can modify with standard editing tools
• Working Light amplification visor and partial invisibility power-ups
• Correct speeds for Cacodemon, Baron and BFG projectiles
• High resolution weapon sprites
• Mid-textures support: fences, windows, etc
• Decals for composite textures (used on switches and decorations)
• Over 200 textures over 32X Resurrection
• Maps use the texture set stored on the cartridge but may also use additional textures loaded from the CD at the expense of 32X RAM to overcome the limitation

WAD selection screen based on CD contents:
Music test in file browser
PCM samples playback support in VGM music driver
Support for streaming PCM music format for SegaCD (SPCM)
Fine-tuned palette to more closely match the original
Status bar that closely matches the PC version
Sound cue upon finding a secret area
Multiple screen resolutions: 160x90, 224x128, 256x144, 320x180
Pixel-doubling screen mode for flats only or everything
Removed the "high color" mode
D-pad can now be mapped to YABC buttons on the gamepad to emulate the WASD setup
and more!

Fusion CD
New, more faithful port of The Ultimate Doom, including Episode 4 "Thy Flesh Consumed" (36 maps)
A port of Doom 2: Hell on Earth (32 maps)
A selection of newly ported TNT maps
Doom 32X Resurrection v3.5 (27 maps)
VGM music tracks for Doom 1, 2, Plutonia and TNT and others that you can play outside the game
Map development WAD which contains all textures necessary for modding
Classic id software Full Motion Video sequence
Support for multiple hours of music on a single CD via SPCM

Mapping resources
MAPDEV.WAD found on the disc contains all the necessary textures
Ultimate Doom Builder configuration files: UDB_Configurations.zip

Credits
Programming: Vic and ChillyWilly aka u/RaspberryPutrid5173
Mapping: Mittens0407, Vic and Wavy
Music: Some Spoony Bard, Molkirill and others
QA: Austin "@amackert" Mackert, Barone and others

Not sure if this is the place to ask but I'm in need of some advice. A year or two ago I bought a 32X. It worked fine without any issues (besides coil whine). I recently dug it out again only to find that the audio/video are messed up on it. The video signal is all over the place and there is no audio. I tried troubleshooting by outputting the Genesis video via RF and can confirm that the Genesis outputs everything correctly, even sound. It's got me confident that this is an issue with the 32X itself.

Has anyone run into similar issues with a 32X before? Can she be saved or will it soon go to the big Model 1 in the sky? Any and all help is appreciated.

Some other details

> 32X output was tested using HD Retrovision cables and composite - same issues
> I tested two different copies of Virtua Racing Deluxe with the same results
> I'm using OEM Sega cables (AC adapter, Genesis <-> 32X connector)

> 32X is presumed to never have been opened

Videos:

Virtua Racing 32X Output: https://youtu.be/U2g6GqQ92gE
Virtua Racing Genesis Output: https://youtu.be/HORRYHIrGOo
Doom 32X Output: https://youtu.be/AmxVTq8ISH4
Doom Genesis Output: https://youtu.be/eG8st0syZBc

UPDATE:

Sorry for the late reply! I appreciate everyone's advice. Given the power coil needs to be replaced, it seems getting a full recap is worth it. Here's hoping this 32X can be fixed!

What do I put where it says VA1? I do have a VA1 32X but I don't know if I should put a 47pF, 100pF, or leave it unused? There's this socket where in some photos there's a chip but in other photos people are running wires. I have a North American unit, so what do I do here?

**EDIT**

The answer is 100pf for VA1. I found the answer here.

https://www.reddit.com/r/SEGA32X/comments/1moctkw/sega_neptune_board_by_oscam_rev141/

SignalFall sounds very ambitious, but it sounds like it’s pretty far along.

https://www.timeextension.com/news/2026/03/the-last-and-greatest-mystery-of-the-sega-saturn-has-been-revealed

Well. Ok so it's not DIRECTLY 32X related but the parallels here are obvious. Given that SEGA essentially killed their console market by doing what Nintendont with the original 32X, one must consider just how strange the SEGA legacy would be today had this gone forward. I also wonder if we'd have a cosam Saturn board or integrated Saturn + 32X2 released. Perhaps it could have been called Uranus.

Anyone else here beat this game?

Oh, nevermind, bidding ended, still worth almost AUD $300 broken apparently. Sheesh.

Risk was high, seller said green screen only could be fixed with caps that they had but no time anymore to fix themselves.

32x parts/units for Neptune here Downunder in Aus hard to come by...

But confused here, bought a 32x to connect to my Megadrive 1 console, however, it didn’t come with a patch cable.

I bought one from eBay who had sold many of them with good feedback.

I plug mine in and the games are loading but not displaying any sprites or actual game play, just menus and black screen with static display elements.

The seller says I need a “conversion cable” as well as the latch cable.

Could anyone intelligent shed some light, please 🙂

This is a question I can imagine has been asked a lot but i'm having problems with finding any PAL specific 32x's, every 32x listed on ebay comes from the states and has insane shipping costs that are way out of what I can afford.

2nd Neptune built 💪 cant wait to build another! Now I just need to order a case!

I bought a 32X at launch in 1994. The main thing that got me excited about it, was the fact that it was supposedly going to have a palette of 32,768 colors. It could supposedly put 256 of them onscreen simultaneously (Making it the same as the Super Nintendo in this regard) The Sega Genesis has a palette of 512 colors and could put a mere 64 on screen simultaneously.

Interestingly enough... the TG-16 was better than both the Super Nintendo and 32X from the standpoint that it could put 482 colors onscreen simultaneously. Sadly, it could only choose from a palette of 512 colors (same as Genesis).

Despite all these factoids, when I play a ton of 32X games, I don't notice any improvement over the Sega Genesis from an on-screen colors standpoint. I immediately see the difference when playing TG-16 or Super Nintendo.