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__NOTOC__
 
<div class="newhome">
==<center>Welcome to the NeoGeo Development Wiki</center>==
<div id="home-header">
 
<div style="min-height:110px;">
<center>This wiki is about every technical aspect of the SNK NeoGeo hardware and software (AES, MVS, CD and CDZ).<br>
  [[File:Neo-Geo-AES-Console-Set.png|left|x100px|link=]]
Its aim is to provide the most detailed, accurate and up to date information, to help homebrew development and repairs.<br>
  <h2 class="title">The NeoGeo Development Wiki</h2>
The wiki has {{NUMBEROFARTICLES}} pages. [[Special:Userlist|Contributors list]]. <br>'''Don't know where to start ? Try [[How_to_start|here]]'''.<BR>
  <p class="headline">This wiki is about every technical aspects of the SNK NeoGeo hardware and software (AES, MVS, CD and CDZ).<br />Our aim is to provide the most detailed, accurate and up to date information for preservation, homebrew development and repairs.</p>
Join us on IRC ! [[irc://irc.freenode.net/neogeodev| Freenode #neogeodev]]</center>
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==[[Special:RecentChanges|Recent changes]] ("minor" edits hidden)==
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==Categories==
 
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[[File:Ban_base.jpg|link=:Category:Base system]]<div style="position: relative; left: 20px; top: -42px; height: 0px; font-size: 30px; text-align: left;">[[:Category:Base system|<span class="cattitle">Base system</span>]]</div>
<div class="home-block">
What's common to every NeoGeo systems: main architecture, data formats, BIOS functions...
    <div class="head cat-base">[[:Category:Base system|<span class="cattitle"><span>Base system</span></span>]]</div>
<table style="font-size:8pt; width:256px; border-spacing: 0px 5px; border-top: 1px solid #CCC; border-bottom: 1px solid #CCC;">
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<div style="position:relative; top:10px;">'''Last edits:'''</div>
        <p>What's common to every NeoGeo system: main architecture, data formats...</p>
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category=Base system
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    <div class="head cat-video">[[:Category:Video system|<span class="cattitle"><span>Video system</span></span>]]</div>
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[[File:Ban_video.jpg|link=:Category:Video system]]<div style="position: relative; left: 20px; top: -42px; height: 0px; font-size: 30px; text-align: left;">[[:Category:Video system|<span class="cattitle">Video system</span>]]</div>
        <p>How graphics are handled and displayed, from bitplanes and colors to the video output.</p>
How graphics are handled and displayed, from bitplanes and colors to the video output.
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<table style="font-size:8pt; width:256px; border-spacing: 0px 5px; border-top: 1px solid #CCC; border-bottom: 1px solid #CCC;">
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    <div class="head cat-audio">[[:Category:Audio system|<span class="cattitle"><span>Audio system</span></span>]]</div>
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[[File:Ban_audio.jpg|link=:Category:Audio system]]<div style="position: relative; left: 20px; top: -42px; height: 0px; font-size: 30px; text-align: left;">[[:Category:Audio system|<span class="cattitle">Audio system</span>]]</div>
        <p>Everything related to music and sound effects: The Z80 subsystem, synthesized and sampled sound, CDDA playback...</p>
Everything related to music and sound effects: The Z80 subsystem, synthesized and sampled sound, CDDA playback...
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<table style="font-size:8pt; width:256px; border-spacing: 0px 5px; border-top: 1px solid #CCC; border-bottom: 1px solid #CCC;">
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    <div class="head cat-repair">[[:Category:Repairs|<span class="cattitle"><span>Repairs</span></span>]]</div>
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[[File:Ban_chips.jpg|link=:Category:Chips]]<div style="position: relative; left: 20px; top: -42px; height: 0px; font-size: 30px; text-align: left;">[[:Category:Chips|<span class="cattitle">Electronics</span>]]</div>
        <p>Troubleshooting dead or glitchy MVS boards, CD laser assemblies, cartridges...</p>
What makes everything work (or not), physically. Schematics, chip pinouts and functions, troubleshooting hardware issues...
    </div>
<table style="font-size:8pt; width:256px; border-spacing: 0px 5px; border-top: 1px solid #CCC; border-bottom: 1px solid #CCC;">
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    <div class="head cat-cart">[[:Category:Cartridge systems|<span class="cattitle"><span>Cart systems</span></span>]]</div>
 
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| style="height: 100%;" |
        <p>Particularities of the AES and MVS systems: ROM types, memory cards, cab I/O, data security... Also [[:Category:Cartridge boards|cartridge boards]] information.</p>
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[[File:Ban_cart.jpg|link=:Category:Cartridge systems]]<div style="position: relative; left: 20px; top: -42px; height: 0px; font-size: 30px; text-align: left;">[[:Category:Cartridge systems|<span class="cattitle">Cart systems</span>]]</div>
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Particularities of the AES and MVS systems: ROM types, memory cards, cab I/O, data security...
        <div>'''Last edits'''</div>
<table style="font-size:8pt; width:256px; border-spacing: 0px 5px; border-top: 1px solid #CCC; border-bottom: 1px solid #CCC;">
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Pages in category: {{PAGESINCAT:Cartridge systems}}
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    <div class="head cat-cd">[[:Category:CD systems|<span class="cattitle"><span>CD systems</span></span>]]</div>
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[[File:Ban_cd.jpg|link=:Category:CD systems]]<div style="position: relative; left: 20px; top: -42px; height: 0px; font-size: 30px; text-align: left;">[[:Category:CD systems|<span class="cattitle">CD systems</span>]]</div>
        <p>NeoGeo CD and CDZ specificities: Differences and limitations, new memory functions, CDDA...</p>
NeoGeo CD and CDZ specificities: Differences and limitations, new memory functions, CDDA...
    </div>
<table style="font-size:8pt; width:256px; border-spacing: 0px 5px; border-top: 1px solid #CCC; border-bottom: 1px solid #CCC;">
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    <div class="head cat-code">[[:Category:Code|<span class="cattitle"><span>Software</span></span>]]</div>
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[[File:Ban_code.jpg|link=:Category:Code]]<div style="position: relative; left: 20px; top: -42px; height: 0px; font-size: 30px; text-align: left;">[[:Category:Code|<span class="cattitle">Code & HowTo's</span>]]</div>
        <p>Code snippets, register definitions, guides on how to display stuff, use the system ROM, play music and sounds, read user input...</p>
Code snippets, register definitions, guides on how to display stuff, use BIOS functions, play music and sounds, read user input...
    </div>
<table style="font-size:8pt; width:256px; border-spacing: 0px 5px; border-top: 1px solid #CCC; border-bottom: 1px solid #CCC;">
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    <div class="head cat-chips">[[:Category:Chips|<span class="cattitle"><span>Electronics</span></span>]]</div>
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[[File:Ban_tools.jpg|link=:Category:Code]]<div style="position: relative; left: 20px; top: -42px; height: 0px; font-size: 30px; text-align: left;">[[:Category:Tools|<span class="cattitle">Tools</span>]]</div>
        <p>What makes everything work (or not). Schematics, chip pinouts and functions, troubleshooting hardware issues...</p>
Assemblers, emulators, utilities, cheatsheets, automations... Anything handy for developement.
    </div>
<table style="font-size:8pt; width:256px; border-spacing: 0px 5px; border-top: 1px solid #CCC; border-bottom: 1px solid #CCC;">
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    <div class="head cat-games">[[:Category:Games|<span class="cattitle"><span>Games</span></span>]]</div>
 
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        <p>Remarquable games for some of their technical aspects: special effects, unusual hardware use, hidden features...</p>
 
    </div>
<div style="border: 1px; height: 104px; padding: 0px; border-style: solid; background-color: #EEE; border-color: black; text-align: center;">
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<div style="position:relative; left: 20px; top: 40px; height: 64px; font-size: 30px; text-align: left;">[[:Category:Games|<span class="cattitle">Games</span>]]</div>
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==[[Special:RecentChanges|Recent changes]] (minor edits hidden)==
{{Special:Recentchanges/4,hideminor}}
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'''How to edit, guidelines, available templates, suggestions: [[The wiki]]'''
  <div class="home-block">
==About this wiki==
    <ul style="list-style:outside none none;">
      <li>The wiki has {{NUMBEROFARTICLES}} pages thanks to our [[Special:Userlist|contributors]]</li>
      <li>Hosting provided by [[User:ElBarto|ElBarto]]</li>
      <li>Don't know where to start ? Try [[How_to_start|here]]</li>
      <li>Can't find what you're looking for ? Try our [[links]]</li>
      <li>'''Want to help ? Just [[Join_wiki|register]] ''' or join us on IRC ! [[irc://irc.libera.chat/neogeodev Libera.chat #neogeodev]]</li>
      <li>'''How to edit, guidelines, available templates, suggestions: [[The wiki]]'''</li>
    </ul>
  </div>
 
  <div class="home-block">


==Todo==
==Todo==
* See [[Special:WantedPages|wanted pages]], [[Special:AncientPages|old pages]], [[Special:ShortPages|short pages]], and [[Todo/Mysteries]].
* See [[Special:WantedPages|wanted pages]], [[Special:AncientPages|old pages]], [[Special:ShortPages|short pages]], and [[Todo/Mysteries]].
* Publish asm highlighter for ConTEXT
* Publish asm highlighter for ConTEXT
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* Troubleshooting tips
* Troubleshooting tips
* Make a downloadable offline capture every few months ?
* Make a downloadable offline capture every few months ?
  </div>
</div>


__NOTOC__
</div>

Latest revision as of 20:15, 20 May 2021

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.

Base system

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

Last edits
Wait cycle23:23, 1 October 2024
NGH number11:54, 17 June 2024
Z80 port map09:19, 28 January 2024
42 pages
Video system

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

Last edits
Sprite graphics format06:24, 10 July 2024
VRAM00:42, 15 March 2024
Eyecatcher20:41, 26 November 2023
36 pages
Audio system

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

Last edits
ADPCM15:17, 15 March 2025
CDDA03:49, 10 February 2025
Z80 port map09:19, 28 January 2024
28 pages
Repairs

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

Last edits
Graphic glitches16:46, 24 February 2025
SLOT6 board20:59, 23 June 2024
NEO-27321:17, 15 June 2024
45 pages
Cart systems

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

Last edits
Cartridge ROM arrangements15:32, 23 February 2025
Schematics13:18, 23 November 2024
SLOT6 board20:59, 23 June 2024
106 pages
CD systems

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

Last edits
CD drive commands04:54, 10 February 2025
CDDA03:49, 10 February 2025
PRG file17:50, 2 January 2025
48 pages
Software

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

Last edits
Vector table swap05:39, 3 January 2025
Loading files17:45, 2 January 2025
Development tools19:34, 9 February 2024
60 pages
Electronics

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

Last edits
NEO-PCM215:09, 13 March 2025
Cartridge ROM arrangements15:32, 23 February 2025
NEO-CMC05:42, 3 January 2025
109 pages
Games

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

Last edits
Slot check security14:02, 31 March 2025
Super Bubble Pop03:56, 6 April 2023
Puzzle Bobble01:55, 6 April 2023
241 pages

Recent changes (minor edits hidden)

CollapseList of abbreviations:
N
This edit created a new page (also see list of new pages)
m
This is a minor edit
b
This edit was performed by a bot
(±123)
The page size changed by this number of bytes

31 March 2025

     14:02  Slot check security‎ diffhist +38‎ Iq 132 talk contribs

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 ?


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