Main Page
The NeoGeo Development Wiki
This wiki is about every technical aspects of the SNK NeoGeo hardware and software (AES, MVS, CD and CDZ).
Our aim is to provide the most detailed, accurate and up to date information for preservation, homebrew development and repairs.
What's common to every NeoGeo system: main architecture, data formats...
| BIOS RAM locations | 02:17, 22 July 2026 |
| Memory speed | 20:32, 21 July 2026 |
| NGH number | 06:57, 9 July 2026 |
How graphics are handled and displayed, from bitplanes and colors to the video output.
| Sprite shrinking | 03:23, 20 July 2026 |
| Rendering logic | 21:37, 18 July 2026 |
| Fix bankswitching | 01:27, 7 July 2026 |
Everything related to music and sound effects: The Z80 subsystem, synthesized and sampled sound, CDDA playback...
| Z80 ERROR | 18:05, 12 July 2026 |
| Non-PCM games | 08:57, 9 July 2026 |
| Boot music | 08:30, 9 July 2026 |
Troubleshooting dead or glitchy MVS boards, CD laser assemblies, cartridges...
| Memory speed | 20:32, 21 July 2026 |
| Z80 ERROR | 18:05, 12 July 2026 |
| NEO-BUF | 13:48, 8 June 2026 |
Particularities of the AES and MVS systems: ROM types, memory cards, cab I/O, data security... Also cartridge boards information.
| Non-PCM games | 08:57, 9 July 2026 |
| Converts | 08:44, 9 July 2026 |
| V ROM | 08:11, 9 July 2026 |
NeoGeo CD and CDZ specificities: Differences and limitations, new memory functions, CDDA...
| Game CD structure | 09:04, 9 July 2026 |
| LC78815 | 06:14, 26 June 2026 |
| CD drive | 09:36, 1 November 2025 |
Code snippets, register definitions, guides on how to display stuff, use the system ROM, play music and sounds, read user input...
| Displaying credits | 03:31, 22 July 2026 |
| 68k instructions timings | 18:19, 15 April 2026 |
| 68k program header | 01:38, 8 February 2026 |
What makes everything work (or not). Schematics, chip pinouts and functions, troubleshooting hardware issues...
| Memory speed | 20:32, 21 July 2026 |
| L0 ROM | 03:26, 20 July 2026 |
| PCM | 08:23, 9 July 2026 |
Remarquable games for some of their technical aspects: special effects, unusual hardware use, hidden features...
| Puzzle Bobble | 17:25, 19 July 2026 |
| Top Player's Golf | 09:02, 9 July 2026 |
| The Super Spy | 09:02, 9 July 2026 |
About this wiki
- The wiki has 580 pages thanks to our contributors
- Hosting provided by Furrtek, previously by ElBarto for 15 years !
- Don't know where to start ? Try here
- Can't find what you're looking for ? Try our links
- Want to help ? Just register !
- How to edit, guidelines, available templates, suggestions: The wiki
Todo
- See wanted pages, old pages, short pages, and Todo/Mysteries.
- Make subcategories, move/merge "BIOS calls"
- Better troubleshooting tips
- Make a downloadable offline capture every few months ?