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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 479 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)

21 September 2016

     20:38  HD6301V1‎ (diff | hist) . . (+34,381). . Hpman (Talk | contribs)
     16:20 (Move log) . . Furrtek (Talk | contribs) moved page HD6301 to HD6301V1(The "V1" is important: new instructions)
     16:13  HD6301‎ (diff | hist) . . (+12,682). . Furrtek (Talk | contribs)

Categories

Ban base.jpg

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

Last edits:
NEO-POWER-001:08, 1 September 2016
Power supply14:48, 30 August 2016
Power requirements14:28, 30 August 2016

Pages in category: 41

Ban video.jpg

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

Last edits:
Palette rotation15:30, 24 September 2016
Video PLL07:32, 27 August 2016
Fix bankswitching23:13, 19 August 2016

Pages in category: 31

Ban audio.jpg

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

Last edits:
68k/Z80 communication17:28, 15 August 2016
Z80 ERROR18:03, 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:
Memory speed17:22, 15 August 2016
Z80 ERROR18:03, 26 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:
HD6301V120:38, 21 September 2016
Multiplayer15:59, 21 September 2016
Schematics18:58, 24 August 2016

Pages in category: 72

Ban cd.jpg

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

Last edits:
CDZ05:17, 16 August 2016
DRAM00:40, 21 July 2016
CD module21:29, 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:
Palette rotation15:30, 24 September 2016
Optimization06:59, 23 September 2016
Homebrew software18:26, 5 September 2016

Pages in category: 53

Ban chips.jpg

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

Last edits:
HD6301V120:38, 21 September 2016
NEO-SMA12:43, 30 August 2016
NEO-SUD12:32, 30 August 2016

Pages in category: 105

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

Last edits:
Double Dragon01:32, 16 September 2016
Blazing Star01:31, 16 September 2016
Art of Fighting01:30, 16 September 2016
Pages in category: 236

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 ?