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What's common to every NeoGeo systems: main architecture, data formats, BIOS functions...
What's common to every NeoGeo system: main architecture, data formats, ...
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Code snippets, register definitions, guides on how to display stuff, use BIOS functions, play music and sounds, read user input...
Code snippets, register definitions, guides on how to display stuff, use the system ROM, play music and sounds, read user input...
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What makes everything work (or not), physically. Schematics, chip pinouts and functions, troubleshooting hardware issues...
What makes everything work (or not). Schematics, chip pinouts and functions, troubleshooting hardware issues...
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Revision as of 02:41, 16 March 2016

File:Logo.png

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 574 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 match these criteria.

Categories

File:Ban base.jpg

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

Last edits:
BIOS RAM locations21:25, 11 August 2025
Pinouts15:34, 23 July 2025
Memory mapped registers19:21, 10 April 2025

Pages in category: 42

File:Ban video.jpg

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

Last edits:
Slowdown07:12, 12 September 2025
Fix bankswitching21:25, 14 May 2025
Sprites21:18, 14 May 2025

Pages in category: 36

File:Ban audio.jpg

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

Last edits:
NEO-ZMC15:45, 1 May 2025
ADPCM15:17, 15 March 2025
CDDA03:49, 10 February 2025

Pages in category: 28

File:Ban tools.jpg

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

Last edits:
CD drive07:36, 1 November 2025
List of ROM chips00:03, 26 September 2025
Graphic glitches16:46, 24 February 2025

Pages in category: 45

File: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:
PROG board00:23, 27 September 2025
NEO-FTC1B board20:36, 19 September 2025
CHA board19:25, 6 September 2025

Pages in category: 106

File:Ban cd.jpg

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

Last edits:
CD drive07:36, 1 November 2025
CDROM-2 board01:49, 18 August 2025
CD hardware versions01:44, 18 August 2025

Pages in category: 48

File: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:
Development tools14:00, 6 October 2025
PLAYER START subroutine12:00, 6 October 2025
Slowdown07:12, 12 September 2025

Pages in category: 60

File:Ban chips.jpg

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

Last edits:
NEO-E019:18, 19 November 2025
CD drive07:36, 1 November 2025
PROG board00:23, 27 September 2025

Pages in category: 109

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

Last edits:
Slot check security06:36, 28 October 2025
Super Bubble Pop03:56, 6 April 2023
Puzzle Bobble01:55, 6 April 2023
Pages in category: 241

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 ?


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