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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 569 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)

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10 April 2025

Categories

File:Ban base.jpg

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

Last edits:
Memory mapped registers19:21, 10 April 2025
Wait cycle23:23, 1 October 2024
NGH number11:54, 17 June 2024

Pages in category: 42

File:Ban video.jpg

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

Last edits:
Sprite graphics format06:24, 10 July 2024
VRAM00:42, 15 March 2024
Eyecatcher20:41, 26 November 2023

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:
ADPCM15:17, 15 March 2025
CDDA03:49, 10 February 2025
Z80 port map09:19, 28 January 2024

Pages in category: 28

File:Ban tools.jpg

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

Last edits:
Graphic glitches16:46, 24 February 2025
SLOT6 board20:59, 23 June 2024
NEO-27321:17, 15 June 2024

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:
Cartridge ROM arrangements15:32, 23 February 2025
Schematics13:18, 23 November 2024
SLOT6 board20:59, 23 June 2024

Pages in category: 106

File:Ban cd.jpg

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

Last edits:
CDROM-2 board10:26, 12 April 2025
NEO-CDD board19:01, 10 April 2025
CD drive commands04:54, 10 February 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:
Memory mapped registers19:21, 10 April 2025
Vector table swap05:39, 3 January 2025
Loading files17:45, 2 January 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:
CDROM-2 board10:26, 12 April 2025
NEO-CDD board19:01, 10 April 2025
NEO-PCM215:09, 13 March 2025

Pages in category: 109

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

Last edits:
Slot check security14:02, 31 March 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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