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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.

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

Last edits
Software DIPs03:34, 21 October 2017
Battery-backed RAM03:34, 21 October 2017
Power supply18:22, 13 October 2017
44 pages

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

Last edits
Sprite shrinking11:37, 20 November 2017
Eyecatcher03:54, 21 October 2017
S ROM03:35, 21 October 2017
35 pages

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

Last edits
Power amp22:05, 26 September 2017
Z80 ERROR23:30, 19 September 2017
YM261019:19, 26 July 2017
31 pages

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

Last edits
MV-ELA05:51, 14 November 2017
RAM chip03:43, 21 October 2017
System self-test07:53, 10 October 2017
35 pages

Particularities of the AES and MVS systems: ROM types, memory cards, cab I/O, data security... Also cartridge boards information.

Last edits
MV-ELC06:04, 14 November 2017
MV-ELD06:04, 14 November 2017
MV-ELA05:51, 14 November 2017
91 pages

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

Last edits
Copy protection22:50, 7 October 2017
Burning CDs04:54, 6 October 2017
Logo file23:47, 11 September 2017
47 pages

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

Last edits
Controlling the marquee07:11, 14 November 2017
Controlling the credits display07:10, 14 November 2017
Eyecatcher03:54, 21 October 2017
59 pages

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

Last edits
RAM chip03:43, 21 October 2017
S ROM03:35, 21 October 2017
Battery-backed RAM03:34, 21 October 2017
103 pages

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

Last edits
Windjammers01:37, 23 September 2017
Voltage Fighter - Gowcaizer01:37, 23 September 2017
Viewpoint01:37, 23 September 2017
237 pages

Recent changes (minor edits hidden)

20 November 2017

     11:38 (Deletion log) . . Furrtek (talk | contribs) deleted page Sprite scaling(Duplicate)

About this 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 ?