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Welcome to 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.
The wiki has 528 pages. Contributors list. 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]

Recent changes (minor edits hidden)

25 April 2017

     18:54  Pinouts‎ (diff | hist) . . (+295). . Furrtek (talk | contribs) (A/V and power connectors)

     18:39 

(Upload log). .

[Furrtek‎ (2×)]

     

18:39

. . Furrtek (talk | contribs) uploaded File:Cdpow pinout.png

     

18:38

. . Furrtek (talk | contribs) uploaded File:Av pinout.png

Categories

Ban base.jpg

What's common to every NeoGeo system: main architecture, data formats, ...

Last edits:
68k instructions timings01:12, 26 April 2017
Power requirements19:30, 25 April 2017
Power supply19:13, 25 April 2017

Pages in category: 43

Ban video.jpg

How graphics are handled and displayed, from bitplanes and colors to the video output.

Last edits:
Sprite scaling08:16, 11 April 2017
Fix graphics format20:56, 20 March 2017
Display timing11:38, 19 March 2017

Pages in category: 36

Ban audio.jpg

Everything related to music and sound effects: The Z80 subsystem, synthesized and sampled sound, CDDA playback...

Last edits:
Sphero Symphony02:47, 5 April 2017
Z80 interrupts23:07, 18 February 2017
LC7881512:02, 18 February 2017

Pages in category: 29

Ban tools.jpg

Troubleshooting dead or glitchy MVS boards, CD laser assemblies, cartridges...

Last edits:
Signals13:06, 16 April 2017
Slowdown20:38, 13 March 2017
Hardware test11:36, 19 February 2017

Pages in category: 34

Ban cart.jpg

Particularities of the AES and MVS systems: ROM types, memory cards, cab I/O, data security... Also cartridge boards information.

Last edits:
Bootleg MVS boards21:19, 13 April 2017
Hardware DIPs22:47, 1 April 2017
SFIX ROM22:13, 1 April 2017

Pages in category: 87

Ban cd.jpg

NeoGeo CD and CDZ specificities: Differences and limitations, new memory functions, CDDA...

Last edits:
IPL file09:00, 18 April 2017
Burning CDs23:17, 1 April 2017
NEO-CDA board23:03, 1 April 2017

Pages in category: 47

Ban code.jpg

Code snippets, register definitions, guides on how to display stuff, use the system ROM, play music and sounds, read user input...

Last edits:
68k instructions timings01:12, 26 April 2017
Sprite scaling08:16, 11 April 2017
Burning CDs23:17, 1 April 2017

Pages in category: 56

Ban chips.jpg

What makes everything work (or not). Schematics, chip pinouts and functions, troubleshooting hardware issues...

Last edits:
Pinouts18:54, 25 April 2017
Signals13:06, 16 April 2017
NEO-OFC23:21, 1 April 2017

Pages in category: 103

Remarquable games for some of their technical aspects: special effects, unusual hardware use, hidden features...

Last edits:
The King of Fighters '98 - The Slugfest20:36, 13 April 2017
Fast Striker03:28, 30 March 2017
Meg count03:15, 30 March 2017
Pages in category: 237

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 ?