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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 507 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:
68k instructions timings01:53, 17 November 2016
Clock22:41, 13 November 2016
Z80 port map06:23, 3 November 2016

Pages in category: 42

Ban video.jpg

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

Last edits:
Video PLL08:42, 7 November 2016
Video DAC14:28, 4 November 2016
Sprite shrinking10:36, 3 November 2016

Pages in category: 33

Ban audio.jpg

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

Last edits:
Z80 ERROR02:30, 17 November 2016
Sound driver02:28, 17 November 2016
YM2610 registers01:35, 17 November 2016

Pages in category: 27

Ban tools.jpg

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

Last edits:
Corrosion02:53, 17 November 2016
Z80 ERROR02:30, 17 November 2016
List of ROM chips20:35, 10 November 2016

Pages in category: 28

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:
Coin counter02:37, 17 November 2016
NEO-HYCS21:56, 14 November 2016
Bootleg21:51, 14 November 2016

Pages in category: 80

Ban cd.jpg

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

Last edits:
Copy protection02:31, 17 November 2016
NEO-CDM4-2 board02:25, 17 November 2016
NEO-CDM4-1 board02:25, 17 November 2016

Pages in category: 44

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:
Common pitfalls06:48, 19 November 2016
Copy protection02:31, 17 November 2016
68k instructions timings01:53, 17 November 2016

Pages in category: 55

Ban chips.jpg

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

Last edits:
NEO-MGA02:43, 17 November 2016
NEO-C102:16, 17 November 2016
NEO-B102:16, 17 November 2016

Pages in category: 105

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

Last edits:
Art of Fighting00:16, 1 November 2016
2020 Super Baseball00:11, 1 November 2016
The King of Fighters '98 - The Slugfest23:31, 31 October 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 ?