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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 429 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)

10 March 2014

• (User creation log); 19:38 . . User account Byte Surfer (Talk | contribs) was created by ElBarto (Talk | contribs) ‎

4 March 2014

• (Upload log); 08:57 . . Furrtek (Talk | contribs) uploaded "File:B1die.jpg" ‎

Categories

Base system What's common to every NeoGeo systems: main architecture, data formats, BIOS functions... Last edits: Memory mapped registers 20:45, 3 March 2014 BIOS RAM locations 13:02, 6 February 2014 68k program header 18:09, 1 February 2014 Pages in category: 30	Video system How graphics are handled and displayed, from bitplanes and colors to the video output. Last edits: Horizontal reduction 13:52, 5 January 2014 Sprites 13:42, 5 January 2014 GPU 04:00, 5 January 2014 Pages in category: 20	Audio system Everything related to music and sound effects: The Z80 subsystem, synthesized and sampled sound, CDDA playback... Last edits: YM2610 18:29, 5 January 2014 ADPCM codecs 19:39, 8 November 2013 YM2610 bus timing 08:57, 7 January 2013 Pages in category: 17	Repairing Troubleshooting dead or glitchy MVS boards, CD laser assemblies, cartridges... Last edits: Graphic glitches 06:54, 1 March 2014 SLOT6 board 05:00, 6 January 2013 Repairing Metal Slug X 09:35, 24 September 2012 Pages in category: 8
Cart systems Particularities of the AES and MVS systems: ROM types, memory cards, cab I/O, data security... Also cartridge boards information. Last edits: Fusion converter 20:12, 26 February 2014 MVS cartridge pinout 16:36, 5 January 2014 AES cartridge pinout 16:36, 5 January 2014 Pages in category: 58	CD systems NeoGeo CD and CDZ specificities: Differences and limitations, new memory functions, CDDA... Last edits: DMA 18:03, 1 March 2014 Logo file 18:27, 9 January 2014 AXT file 09:11, 28 December 2013 Pages in category: 35	Software Code snippets, register definitions, guides on how to display stuff, use BIOS functions, play music and sounds, read user input... Last edits: Memory mapped registers 20:45, 3 March 2014 USER subroutine 01:40, 2 February 2014 68k program header 18:09, 1 February 2014 Pages in category: 49	Electronics What makes everything work (or not), physically. Schematics, chip pinouts and functions, troubleshooting hardware issues... Last edits: NEO-B1 09:00, 4 March 2014 LC8953 17:59, 1 March 2014 Fusion converter 20:12, 26 February 2014 Pages in category: 98
Games Remarquable games for some of their technical aspects: special effects, unusual hardware use, hidden features... Last edits: Slot check security 02:55, 8 October 2013 The King of Fighters '94 15:35, 6 October 2013 NAM-1975 14:37, 28 June 2013 Pages in category: 221

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 ?