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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 529 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)

24 June 2017

20 June 2017

Categories

Base system What's common to every NeoGeo system: main architecture, data formats, ... Last edits: 68k memory map 00:45, 24 June 2017 System ROM 00:44, 24 June 2017 68k program header 22:26, 28 May 2017 Pages in category: 43	Video system How graphics are handled and displayed, from bitplanes and colors to the video output. Last edits: Sprite graphics format 05:25, 12 May 2017 Colors 05:03, 12 May 2017 GPU 23:55, 10 May 2017 Pages in category: 36	Audio system Everything related to music and sound effects: The Z80 subsystem, synthesized and sampled sound, CDDA playback... Last edits: YM2610 registers 20:23, 24 June 2017 YM2610 04:30, 24 June 2017 YM2610 registers map 12:45, 20 June 2017 Pages in category: 31	Repairing Troubleshooting dead or glitchy MVS boards, CD laser assemblies, cartridges... Last edits: CD drive 07:06, 1 June 2017 DISC I/O ERROR 21:13, 13 May 2017 Signals 13:06, 16 April 2017 Pages in category: 34
Cart systems Particularities of the AES and MVS systems: ROM types, memory cards, cab I/O, data security... Also cartridge boards information. Last edits: CHA board 00:57, 24 June 2017 PROG board 00:57, 24 June 2017 JAMMA connector pinout 21:25, 7 June 2017 Pages in category: 87	CD systems NeoGeo CD and CDZ specificities: Differences and limitations, new memory functions, CDDA... Last edits: PAT file 01:50, 18 June 2017 Logo file 02:27, 13 June 2017 CD drive 07:06, 1 June 2017 Pages in category: 47	Software Code snippets, register definitions, guides on how to display stuff, use the system ROM, play music and sounds, read user input... Last edits: YM2610 registers 20:23, 24 June 2017 Transparency effects 11:35, 24 June 2017 YM2610 registers map 12:45, 20 June 2017 Pages in category: 57	Electronics What makes everything work (or not). Schematics, chip pinouts and functions, troubleshooting hardware issues... Last edits: YM2610 04:30, 24 June 2017 CHA board 00:57, 24 June 2017 PROG board 00:57, 24 June 2017 Pages in category: 103
Games Remarquable games for some of their technical aspects: special effects, unusual hardware use, hidden features... Last edits: Slot check security 00:40, 24 June 2017 The King of Fighters '98 - The Slugfest 20:36, 13 April 2017 Fast Striker 03:28, 30 March 2017 Pages in category: 237

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 ?