User:Rom1: Difference between revisions

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==Categories==
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        <p style="margin:0">[[File:Ban_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>
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        <p>What's common to every NeoGeo system: main architecture, data formats...</p>
 
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<div style="width:256px; border-radius:0.3rem;box-shadow:0 0 0.3rem #999;margin:1rem;padding:0; overflow:hidden;text-align:center">
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        <div>'''Last edits'''</div>
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                category=Base system
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        <p style="margin:0">[[File:Ban_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>
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        <p>How graphics are handled and displayed, from bitplanes and colors to the video output.</p>
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        <div>'''Last edits'''</div>
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                category=Video system
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     <div class="head" style="position:relative;">
         <p style="margin:0">[[File:Ban_audio.jpg|link=:Category:Audio system]]</p>
         <p style="margin:0">[[File:Ban_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 style="position:absolute;top:25px;left:20px;font-size:30px;">[[:Category:Audio system|<span class="cattitle">Audio system</span>]]</div>
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         <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>'''Last edits'''</div>
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             <forum>
                 category=Audio system
                 category=Audio system
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     <div class="head" style="position:relative;">
         <p style="margin:0">[[File:Ban_tools.jpg|link=:Category:Repairs]]</p>
         <p style="margin:0">[[File:Ban_tools.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 style="position:absolute;top:25px;left:20px;font-size:30px;">[[:Category:Repairs|<span class="cattitle">Repairs</span>]]</div>
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         <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>'''Last edits'''</div>
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                 category=Repairs
                 category=Repairs
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    <div class="head" style="position:relative;">
 
        <p style="margin:0">[[File:Ban_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>
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    <div class="content" style="padding:0 1rem;flex:1 0 auto;">
        <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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                category=Cartridge systems
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        </table>{{PAGESINCAT:Cartridge systems}} pages
    </div>
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    <div class="head" style="position:relative;">
        <p style="margin:0">[[File:Ban_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>
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    <div class="content" style="padding:0 1rem;flex:1 0 auto;">
        <p>NeoGeo CD and CDZ specificities: Differences and limitations, new memory functions, CDDA...</p>
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<div>
        <div>'''Last edits'''</div>
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                category=CD systems
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        <p style="margin:0">[[File:Ban_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" style="padding:0 1rem;flex:1 0 auto;">
        <p>Code snippets, register definitions, guides on how to display stuff, use the system ROM, play music and sounds, read user input...</p>
    </div>
<div>
        <div>'''Last edits'''</div>
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                category=Code
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        </table>{{PAGESINCAT:Code}} pages
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    <div class="head" style="position:relative;">
        <p style="margin:0">[[File:Ban_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>
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    <div class="content" style="padding:0 1rem;flex:1 0 auto;">
        <p>What makes everything work (or not). Schematics, chip pinouts and functions, troubleshooting hardware issues...</p>
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        <p style="margin:0">[[File:Ban_video.jpg|link=:Category:Games]]</p>
        <div style="position:absolute;top:25px;left:20px;font-size:30px;">[[:Category:Games|<span class="cattitle">Games</span>]]</div>
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        <p>Remarquable games for some of their technical aspects: special effects, unusual hardware use, hidden features...</p>
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Revision as of 22:36, 30 August 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.

Recent changes (minor edits hidden)

No changes during the given period match these criteria.

File:Ban base.jpg

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

Last edits
BIOS RAM locations21:25, 11 August 2025
Pinouts15:34, 23 July 2025
Memory mapped registers19:21, 10 April 2025
42 pages

File:Ban video.jpg

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

Last edits
Slowdown07:12, 12 September 2025
Fix bankswitching21:25, 14 May 2025
Sprites21:18, 14 May 2025
36 pages

File:Ban audio.jpg

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

Last edits
NEO-ZMC15:45, 1 May 2025
ADPCM15:17, 15 March 2025
CDDA03:49, 10 February 2025
28 pages

File:Ban tools.jpg

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

Last edits
CD drive07:36, 1 November 2025
List of ROM chips00:03, 26 September 2025
Graphic glitches16:46, 24 February 2025
45 pages

File:Ban cart.jpg

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

Last edits
PROG board00:23, 27 September 2025
NEO-FTC1B board20:36, 19 September 2025
CHA board19:25, 6 September 2025
106 pages

File:Ban cd.jpg

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

Last edits
CD drive07:36, 1 November 2025
CDROM-2 board01:49, 18 August 2025
CD hardware versions01:44, 18 August 2025
48 pages

File:Ban code.jpg

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

Last edits
Development tools14:00, 6 October 2025
PLAYER START subroutine12:00, 6 October 2025
Slowdown07:12, 12 September 2025
60 pages

File:Ban chips.jpg

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

Last edits
NEO-E019:18, 19 November 2025
CD drive07:36, 1 November 2025
PROG board00:23, 27 September 2025
109 pages

File:Ban video.jpg

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

Last edits
Slot check security06:36, 28 October 2025
Super Bubble Pop03:56, 6 April 2023
Puzzle Bobble01:55, 6 April 2023
241 pages

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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