Difference between revisions of "Main Page"

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==<center>Welcome to the NeoGeo Development Wiki</center>==
<center>This wiki is about every technical aspect of the SNK NeoGeo hardware and software (AES, MVS, CD and CDZ).<br>
<center>This wiki is about every technical aspect of the SNK NeoGeo hardware and software (AES, MVS, CD and CDZ).<br>

Revision as of 16:00, 23 April 2014


Welcome to the NeoGeo Development Wiki

This wiki is about every technical aspect of the SNK NeoGeo hardware and software (AES, MVS, CD and CDZ).

Its aim is to provide the most detailed, accurate and up to date information, to help homebrew development and repairs.
The wiki has 565 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.


File:Ban base.jpg

What's common to every NeoGeo systems: main architecture, data formats, BIOS functions...

Last edits:
Clock22:38, 18 June 2020
Pinouts09:32, 5 June 2020
Power requirements00:04, 26 May 2020

Pages in category: 44

File:Ban video.jpg

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

Last edits:
Eyecatcher14:13, 30 May 2020
CXA114501:13, 24 May 2020
Video DAC23:14, 16 May 2020

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:
Z80 RAM16:37, 22 May 2020
LC7881521:19, 13 November 2019
CDDA16:07, 10 July 2019

Pages in category: 30

File:Ban tools.jpg

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

Last edits:
UPD499019:13, 15 June 2020
RAM chip23:34, 21 May 2020
CRE40120:48, 17 May 2020

Pages in category: 44

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:
SNK AES Action Reply23:12, 30 May 2020
Schematics15:26, 30 May 2020
NEO-AES3-3 board23:50, 25 May 2020

Pages in category: 104

File:Ban cd.jpg

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

Last edits:
DISC I/O ERROR19:28, 25 February 2020
LC9800005:00, 21 January 2020
POWCD-X07:40, 5 December 2019

Pages in category: 48

File:Ban code.jpg

Code snippets, register definitions, guides on how to display stuff, use BIOS functions, play music and sounds, read user input...

Last edits:
Eyecatcher14:13, 30 May 2020
Memory mapped registers01:33, 12 November 2019
CD drive control18:47, 22 June 2019

Pages in category: 61

File:Ban chips.jpg

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

Last edits:
Logic chip cheatsheet09:01, 8 July 2020
UPD499019:13, 15 June 2020
Reset generator22:07, 13 June 2020

Pages in category: 109

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

Last edits:
Metal Slug X - Super Vehicle-00120:17, 9 July 2019
Super Sidekicks16:17, 10 June 2019
Ghostlop (prototype)12:09, 4 April 2019
Pages in category: 239

How to edit, guidelines, available templates, suggestions: The wiki


  • 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 ?