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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 472 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)

22 July 2016

N    16:49  Optimization‎ (diff | hist) . . (+3,329). . Furrtek (Talk | contribs) (Created page with "As seen on the 68k instructions timings. =VRAM access= Since <pre>move.w *,xxx.L</pre> Is always slower than <pre>move.w *,d(An)</pre> Try reserving an address register...")

Categories

Ban base.jpg

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

Last edits:
68k instructions timings03:09, 22 July 2016
Memory speed17:08, 23 June 2016
Joypad00:53, 23 June 2016

Pages in category: 39

Ban video.jpg

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

Last edits:
Palette rotation04:48, 9 July 2016
Frame size01:34, 24 June 2016
Sprite shrinking22:28, 22 June 2016

Pages in category: 30

Ban audio.jpg

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

Last edits:
Z80 ERROR18:03, 26 June 2016
68k/Z80 communication18:00, 26 June 2016
Boot music03:11, 29 May 2016

Pages in category: 18

Ban tools.jpg

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

Last edits:
Z80 ERROR18:03, 26 June 2016
Memory speed17:08, 23 June 2016
Click of death02:10, 4 May 2016

Pages in category: 20

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:
Arcade Time-out12:39, 18 July 2016
Schematics00:46, 23 June 2016
Coin counter03:14, 1 May 2016

Pages in category: 71

Ban cd.jpg

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

Last edits:
DRAM00:40, 21 July 2016
CD module21:29, 2 June 2016
Optical pickups00:39, 2 June 2016

Pages in category: 39

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:
Optimization16:49, 22 July 2016
68k instructions timings03:09, 22 July 2016
Palette rotation04:48, 9 July 2016

Pages in category: 53

Ban chips.jpg

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

Last edits:
DRAM00:40, 21 July 2016
Memory speed17:08, 23 June 2016
NEO-C116:16, 23 June 2016

Pages in category: 102

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

Last edits:
Arcade Time-out12:39, 18 July 2016
World Heroes 204:07, 9 July 2016
Multicart08:11, 22 April 2016
Pages in category: 231

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 ?