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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 414 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]

Categories

Base system What's common to every NeoGeo systems: main architecture, data formats, BIOS functions... Last edits: Memory mapped registers 00:33, 5 March 2013 BIOS 15:13, 10 February 2013 Watchdog 19:10, 26 January 2013 Pages in category: 30	Video system How graphics are handled and displayed, from bitplanes and colors to the video output. Last edits: Software rendering 05:43, 25 December 2012 Fix bankswitching 21:11, 24 December 2012 VRAM 20:02, 24 December 2012 Pages in category: 18	Audio system Everything related to music and sound effects: The Z80 subsystem, synthesized and sampled sound, CDDA playback... Last edits: YM2610 bus timing 08:57, 7 January 2013 YM2610 08:33, 7 January 2013 Z80/YM2610 interface 07:51, 7 January 2013 Pages in category: 17	Repairing Troubleshooting dead or glitchy MVS boards, CD laser assemblies, cartridges... Last edits: SLOT6 board 05:00, 6 January 2013 Repairing Metal Slug X 09:35, 24 September 2012 Graphic glitches 17:31, 19 August 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: Backup RAM 17:30, 16 March 2013 Comodo-1 converter 19:35, 10 February 2013 Open hardware memory card 05:22, 7 February 2013 Pages in category: 58	CD systems NeoGeo CD and CDZ specificities: Differences and limitations, new memory functions, CDDA... Last edits: DMA 23:37, 2 January 2013 PCM file 18:26, 14 November 2012 SPR file 18:25, 14 November 2012 Pages in category: 27	Software Code snippets, register definitions, guides on how to display stuff, use BIOS functions, play music and sounds, read user input... Last edits: NeoGeo programming cheatsheet 07:12, 2 April 2013 Memory mapped registers 00:33, 5 March 2013 Watchdog 19:10, 26 January 2013 Pages in category: 48	Electronics What makes everything work (or not), physically. Schematics, chip pinouts and functions, troubleshooting hardware issues... Last edits: Comodo-1 converter 19:35, 10 February 2013 NEO-273 16:38, 8 February 2013 Open hardware memory card 05:22, 7 February 2013 Pages in category: 97
Games Remarquable games for some of their technical aspects: special effects, unusual hardware use, hidden features... Last edits: Metal Slug 4 02:14, 17 February 2013 Metal Slug 3 02:06, 17 February 2013 Metal Slug 2 - Super Vehicle-001/II 01:59, 17 February 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 ?