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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 526 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)

No changes during the given period matching these criteria.

Categories

Ban base.jpg

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

Last edits:
Memory mapped registers06:48, 17 March 2017
Comparison with other systems05:10, 15 March 2017
Overclocking19:16, 13 March 2017

Pages in category: 43

Ban video.jpg

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

Last edits:
Fix graphics format20:56, 20 March 2017
Display timing11:38, 19 March 2017
Frame size11:23, 19 March 2017

Pages in category: 35

Ban audio.jpg

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

Last edits:
Sphero Symphony06:21, 27 February 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:
Signals22:13, 21 March 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:
Supergun03:05, 15 March 2017
JAMMA connector pinout22:49, 14 March 2017
Service button22:45, 14 March 2017

Pages in category: 87

Ban cd.jpg

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

Last edits:
Making an ISO file06:16, 17 March 2017
LC895302:04, 16 March 2017
LC7881512:02, 18 February 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:
Memory mapped registers06:48, 17 March 2017
Hello world tutorial19:07, 13 March 2017
MESS OUT05:41, 27 February 2017

Pages in category: 56

Ban chips.jpg

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

Last edits:
Signals22:13, 21 March 2017
LC895302:04, 16 March 2017
Palette RAM04:05, 15 March 2017

Pages in category: 103

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

Last edits:
Art of Fighting06:22, 27 February 2017
2020 Super Baseball01:11, 1 November 2016
The King of Fighters '98 - The Slugfest00:31, 1 November 2016
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 ?