User:Rom1: Difference between revisions

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<div id="home-cat">
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<div class="home-block">
     <div class="head">
     <div class="head cat-base">[[:Category:Base system|<span class="cattitle"><span>Base system</span></span>]]</div>
        <p style="margin:0">[[File:Ban2_base.jpg|link=:Category:Base system]]</p>
        <div style="position:absolute;top:25px;left:20px;font-size:30px;">[[:Category:Base system|<span class="cattitle">Base system</span>]]</div>
    </div>
     <div class="content">
     <div class="content">
         <p>What's common to every NeoGeo system: main architecture, data formats...</p>
         <p>What's common to every NeoGeo system: main architecture, data formats...</p>
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<div class="home-block">
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     <div class="head">
     <div class="head cat-video">[[:Category:Audio system|<span class="cattitle"><span>Videosystem</span></span>]]</div>
        <p style="margin:0">[[File:Ban2_video.jpg|link=:Category:Video system]]</p>
        <div style="position:absolute;top:25px;left:20px;font-size:30px;">[[:Category:Audio system|<span class="cattitle">Videosystem</span>]]</div>
    </div>
     <div class="content">
     <div class="content">
         <p>How graphics are handled and displayed, from bitplanes and colors to the video output.</p>
         <p>How graphics are handled and displayed, from bitplanes and colors to the video output.</p>
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</div>
</div>
<div class="home-block">
<div class="home-block">
     <div class="head">
     <div class="head cat-audio">[[:Category:Audio system|<span class="cattitle"><span>Audio system</span></span>]]</div>
        <p style="margin:0">[[File:Ban2_audio.jpg|link=:Category:Audio system]]</p>
        <div style="position:absolute;top:25px;left:20px;font-size:30px;">[[:Category:Audio system|<span class="cattitle">Audio system</span>]]</div>
    </div>
     <div class="content">
     <div class="content">
         <p>Everything related to music and sound effects: The Z80 subsystem, synthesized and sampled sound, CDDA playback...</p>
         <p>Everything related to music and sound effects: The Z80 subsystem, synthesized and sampled sound, CDDA playback...</p>
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<div class="home-block">
     <div class="head">
     <div class="head cat-repair">[[:Category:Repairs|<span class="cattitle"><span>Repairs</span></span>]]</div>
        <p style="margin:0">[[File:Ban2_repair.jpg|link=:Category:Repairs]]</p>
        <div style="position:absolute;top:25px;left:20px;font-size:30px;">[[:Category:Repairs|<span class="cattitle">Repairs</span>]]</div>
    </div>
     <div class="content">
     <div class="content">
         <p>Troubleshooting dead or glitchy MVS boards, CD laser assemblies, cartridges...</p>
         <p>Troubleshooting dead or glitchy MVS boards, CD laser assemblies, cartridges...</p>
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<div class="home-block">
<div class="home-block">
     <div class="head">
     <div class="head cat-cart">[[:Category:Cartridge systems|<span class="cattitle"><span>Cart systems</span></span>]]</div>
        <p style="margin:0">[[File:Ban2_cart.jpg|link=:Category:Cartridge systems]]</p>
        <div style="position:absolute;top:25px;left:20px;font-size:30px;">[[:Category:Cartridge systems|<span class="cattitle">Cart systems</span>]]</div>
    </div>
     <div class="content">
     <div class="content">
         <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>
         <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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     <div class="head">
     <div class="head cat-cd">[[:Category:CD systems|<span class="cattitle"><span>CD systems</span></span>]]</div>
        <p style="margin:0">[[File:Ban2_cd.jpg|link=:Category:CD systems]]</p>
        <div style="position:absolute;top:25px;left:20px;font-size:30px;">[[:Category:CD systems|<span class="cattitle">CD systems</span>]]</div>
    </div>
     <div class="content">
     <div class="content">
         <p>NeoGeo CD and CDZ specificities: Differences and limitations, new memory functions, CDDA...</p>
         <p>NeoGeo CD and CDZ specificities: Differences and limitations, new memory functions, CDDA...</p>
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<div class="home-block">
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     <div class="head cat-code">[[:Category:Code|<span class="cattitle"><span>Software</span></span>]]</div>
        <p style="margin:0">[[File:Ban2_code.jpg|link=:Category:Code]]</p>
        <div style="position:absolute;top:25px;left:20px;font-size:30px;">[[:Category:Code|<span class="cattitle">Software</span>]]</div>
    </div>
     <div class="content">
     <div class="content">
         <p>Code snippets, register definitions, guides on how to display stuff, use the system ROM, play music and sounds, read user input...</p>
         <p>Code snippets, register definitions, guides on how to display stuff, use the system ROM, play music and sounds, read user input...</p>
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     <div class="head">
     <div class="head cat-chips">[[:Category:Chips|<span class="cattitle"><span>Electronics</span></span>]]</div>
        <p style="margin:0">[[File:Ban2_chips.jpg|link=:Category:Chips]]</p>
        <div style="position:absolute;top:25px;left:20px;font-size:30px;">[[:Category:Chips|<span class="cattitle">Electronics</span>]]</div>
    </div>
     <div class="content">
     <div class="content">
         <p>What makes everything work (or not). Schematics, chip pinouts and functions, troubleshooting hardware issues...</p>
         <p>What makes everything work (or not). Schematics, chip pinouts and functions, troubleshooting hardware issues...</p>
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     <div class="head">
     <div class="head cat-games">[[:Category:Games|<span class="cattitle"><span>Games</span></span>]]</div>
        <p style="margin:0">[[File:Ban2_games.jpg|link=:Category:Games]]</p>
        <div style="position:absolute;top:25px;left:20px;font-size:30px;">[[:Category:Games|<span class="cattitle">Games</span>]]</div>
    </div>
     <div class="content">
     <div class="content">
         <p>Remarquable games for some of their technical aspects: special effects, unusual hardware use, hidden features...</p>
         <p>Remarquable games for some of their technical aspects: special effects, unusual hardware use, hidden features...</p>

Revision as of 19:48, 16 September 2017

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
Memory mapped registers19:21, 10 April 2025
Wait cycle23:23, 1 October 2024
NGH number11:54, 17 June 2024
42 pages
Videosystem

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
NEO-CDD board19:01, 10 April 2025
CD drive commands04:54, 10 February 2025
CDDA03:49, 10 February 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
Memory mapped registers19:21, 10 April 2025
Vector table swap05:39, 3 January 2025
Loading files17:45, 2 January 2025
60 pages
Electronics

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

Last edits
NEO-CDD board19:01, 10 April 2025
NEO-PCM215:09, 13 March 2025
Cartridge ROM arrangements15:32, 23 February 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)

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10 April 2025

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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