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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...
| System ROM tables | 15:09, 20 April 2026 |
| 68k instructions timings | 18:19, 15 April 2026 |
| NGH number | 17:09, 23 March 2026 |
How graphics are handled and displayed, from bitplanes and colors to the video output.
| Palette RAM | 14:47, 17 March 2026 |
| Slowdown | 09:12, 12 September 2025 |
| Fix bankswitching | 23:25, 14 May 2025 |
Everything related to music and sound effects: The Z80 subsystem, synthesized and sampled sound, CDDA playback...
| NEO-ZMC | 09:48, 25 February 2026 |
| Z80 port map | 05:11, 24 February 2026 |
| Z80 | 21:04, 23 February 2026 |
Troubleshooting dead or glitchy MVS boards, CD laser assemblies, cartridges...
| Replacement chip | 22:21, 25 January 2026 |
| CD drive | 09:36, 1 November 2025 |
| List of ROM chips | 02:03, 26 September 2025 |
Particularities of the AES and MVS systems: ROM types, memory cards, cab I/O, data security... Also cartridge boards information.
| Bankswitching | 02:37, 25 February 2026 |
| M1 ROM | 20:47, 23 February 2026 |
| Category:Cartridge boards | 15:23, 10 January 2026 |
NeoGeo CD and CDZ specificities: Differences and limitations, new memory functions, CDDA...
| CD drive | 09:36, 1 November 2025 |
| CDROM-2 board | 03:49, 18 August 2025 |
| CD hardware versions | 03:44, 18 August 2025 |
Code snippets, register definitions, guides on how to display stuff, use the system ROM, play music and sounds, read user input...
| 68k instructions timings | 18:19, 15 April 2026 |
| 68k program header | 01:38, 8 February 2026 |
| Development tools | 16:00, 6 October 2025 |
What makes everything work (or not). Schematics, chip pinouts and functions, troubleshooting hardware issues...
| Palette RAM | 14:47, 17 March 2026 |
| NEO-ZMC | 09:48, 25 February 2026 |
| NEO-ZMC2 | 04:58, 25 February 2026 |
Remarquable games for some of their technical aspects: special effects, unusual hardware use, hidden features...
| Puzzle De Pon! R! | 00:43, 3 April 2026 |
| The King of Fighters '99 - Millennium Battle | 17:07, 15 January 2026 |
| Garou - Mark of the Wolves | 17:06, 15 January 2026 |
About this wiki
- The wiki has 579 pages thanks to our contributors
- Hosting provided by Furrtek, previously by ElBarto for 15 years !
- Don't know where to start ? Try here
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- 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 ?