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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...
| NGH number | 23:09, 28 September 2026 |
| System self-test | 01:57, 27 September 2026 |
| BIOS RAM locations | 10:43, 8 September 2026 |
How graphics are handled and displayed, from bitplanes and colors to the video output.
| Sprite graphics format | 02:57, 19 August 2026 |
| Sprite shrinking | 03:23, 20 July 2026 |
| Rendering logic | 21:37, 18 July 2026 |
Everything related to music and sound effects: The Z80 subsystem, synthesized and sampled sound, CDDA playback...
| Z80 bankswitching | 01:22, 19 August 2026 |
| Z80 | 01:14, 19 August 2026 |
| NEO-ZMC | 00:39, 19 August 2026 |
Troubleshooting dead or glitchy MVS boards, CD laser assemblies, cartridges...
| System self-test | 01:57, 27 September 2026 |
| Memory speed | 20:32, 21 July 2026 |
| Z80 ERROR | 18:05, 12 July 2026 |
Particularities of the AES and MVS systems: ROM types, memory cards, cab I/O, data security... Also cartridge boards information.
| Backup RAM | 17:13, 27 September 2026 |
| Memory card | 13:34, 14 September 2026 |
| NEO-HYCS | 09:59, 24 August 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...
| Playing sound samples | 03:29, 4 October 2026 |
| Making scrollable backgrounds | 03:17, 4 October 2026 |
| Development tools | 04:49, 29 September 2026 |
What makes everything work (or not). Schematics, chip pinouts and functions, troubleshooting hardware issues...
Game technical data and oddities such as use of special effects, unusual hardware...
| Magician Lord | 07:23, 8 September 2026 |
| Slot check security | 16:47, 15 August 2026 |
| Puzzle Bobble | 23:22, 14 August 2026 |
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4 October 2026
| 03:17 | Making scrollable backgrounds diffhist +488 Furrtek talk contribs (Unslop, note about possible methods) | ||||
30 September 2026
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About this wiki
- The wiki has 582 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 ?