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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...
| Memory speed | 11:31, 3 June 2019 |
| Watchdog | 22:16, 9 May 2019 |
| Memory mapped registers | 04:38, 23 April 2019 |
How graphics are handled and displayed, from bitplanes and colors to the video output.
| Graphics pipeline | 18:03, 22 April 2019 |
| Timer interrupt | 10:24, 24 March 2019 |
| Palette rotation | 02:55, 8 March 2019 |
Everything related to music and sound effects: The Z80 subsystem, synthesized and sampled sound, CDDA playback...
| YM2610 registers | 22:03, 12 June 2019 |
| ADPCM codecs | 19:11, 22 April 2019 |
| Z80 | 20:22, 19 February 2019 |
Troubleshooting dead or glitchy MVS boards, CD laser assemblies, cartridges...
| Memory speed | 11:31, 3 June 2019 |
| System ROM mapping circuit | 00:55, 9 May 2019 |
| Click of death | 00:20, 9 May 2019 |
Particularities of the AES and MVS systems: ROM types, memory cards, cab I/O, data security... Also cartridge boards information.
| Bankswitching | 16:12, 10 June 2019 |
| MV4 | 00:12, 9 May 2019 |
| MV6 | 00:12, 9 May 2019 |
NeoGeo CD and CDZ specificities: Differences and limitations, new memory functions, CDDA...
| CD drive commands | 01:13, 21 April 2019 |
| CD drive | 00:48, 21 April 2019 |
| PAT file | 18:27, 6 November 2018 |
Code snippets, register definitions, guides on how to display stuff, use the system ROM, play music and sounds, read user input...
| YM2610 registers | 22:03, 12 June 2019 |
| Watchdog | 22:16, 9 May 2019 |
| Memory mapped registers | 04:38, 23 April 2019 |
What makes everything work (or not). Schematics, chip pinouts and functions, troubleshooting hardware issues...
| L0 ROM | 23:50, 10 June 2019 |
| Bankswitching | 16:12, 10 June 2019 |
| NEO-E0 | 16:57, 7 June 2019 |
Remarquable games for some of their technical aspects: special effects, unusual hardware use, hidden features...
| Super Sidekicks | 18:17, 10 June 2019 |
| Ghostlop (prototype) | 14:09, 4 April 2019 |
| Puzzle Bobble | 02:59, 22 January 2019 |
About this wiki
- The wiki has 555 pages thanks to our contributors
- Hosting provided by ElBarto
- Don't know where to start ? Try here
- Can't find what you're looking for ? Try our links
- Want to help ? Just register or join us on IRC ! [Freenode #neogeodev]
- How to edit, guidelines, available templates, suggestions: The wiki
Todo
- See wanted pages, old pages, short pages, and Todo/Mysteries.
- Publish asm highlighter for ConTEXT
- Make subcategories, move/merge "BIOS calls"
- More schematics, chip details/pinouts
- Troubleshooting tips
- Make a downloadable offline capture every few months ?
