NeoDS

NeoDS
File:Neods.png
General
Author(s)	Ben Ingram (Ingramb)
Type	Emulator
Version	0.2.0
Licence	Mixed
Links
[Media:NeoDs020.zip Download]
Website
Source

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This is a NeoGeo AES/MVS emulator for the Nintendo DS. It can run all types of NeoGeo roms with some limitations.

Currently emulated:

• M68000 cpu (cyclone)
• Z80 cpu (DrZ80)
• All forms of NeoGeo protection/encryption
• Graphics
• ADPCM audio
• PSG audio

Not emulated:

• FM audio
• Raster effects
• Multiplayer
• Some timings are not that accurate

FM audio has already been done in jEnesisDS, so it is possible in theory. It will be hard to squeeze it into NeoDS, as both the ARM7 and ARM9 are pretty busy. But I will try. Most of the graphics in NeoDS are drawn with textured quads. Emulating raster effects using this method would require more polygons per frame than the DS is capable of (as far as I can tell). It may be possible to emulate raster effects using the DS 2D hardware, but there are lots of reasons why this would be difficult.

Installation

Required:

• Nintendo DS (lite)
• DLDI compatible flash card

Optional:

• Slot2 flashcard with RAM (Opera expansion, SuperCard lite, etc.)

1. patch NeoDS.nds for your DLDI flash card (NOTE - not all flashcards require patching). See here: http://chishm.drunkencoders.com/DLDI/index.html.
2. convert some NeoGeo roms (mslug.zip for example).You also need a bios rom (neogeo.zip). NeoDS uses the same rom sets as MAME, make sure they work in MAME before proceeding.
3. Put all the roms you want to convert along with the bios together in a folder.
4. Copy NeoDSConvert.exe into the same folder.
5. Run NeoDSConvert, and it will convert all the NeoGeo roms in that folder. The converted roms will have the *.neo extension.
6. Copy the DLDI patched NeoDS.nds, and all the *.neo roms into the root of your flashcard. Run NeoDS.nds.

The main menu should load, showing you a list of all the roms on your card. Use the arrow keys to select, and press start to choose. The rom should load, and you should be playing. You can load a rom without audio which will improve frame rate, but you won't get any sound (obviously). Once a game is loaded without audio, the only way to get audio back is to reload the game. Some games will freeze with audio disabled, so be warned!

If you have a supported flashcard with external ram in the GBA slot, NeoDS will use the extra ram to cache more data. This will improve the speed of some games, but is never required. The main gui screen will display the text SLOT2 if this feature is active.

Controls

Arrow keys - Arrow keys

ABXY - A, B, C, D

L - Pause

R - Select (acts as coin input using newer versions of universal bios)

Start - Start

Select - Coin

The NeoDS gui is controlled with the stylus.

Video - Video can be normal or scaled. Normal is a cropped screen. Scaled shows the full screen, but scaled down to fit.

CPU Clock- The NeoGeo cpu can be underclocked. This can actually make some games run faster! It is easier for NeoDS to emulate a slower cpu, and some NeoGeo games don't use the full cpu power anyway. Experiment and see.

Screen Off - The lower screen can be turned off. Touch anywhere to turn it back on.

Load rom - Load a new game

Save - Write the current configuration and sram to the flashcard

Input - Remap the input

The input configuraiton screen is a grid. DS buttons are down the right side of the screen. NeoGeo buttons are along the top of the screen. Each row of boxes coorisponds to one DS button. Putting a check in a box maps a NeoGeo button to a DS button. You can map multiple NeoGeo buttons to a single DS button this way. This can be useful for fighting games, or for other things.

Media

NeoDS Tutorial

Changelog

v0.2.0 6/19/2008

• Key configuration
• Pause key
• Put DS to sleep when lid is closed
• Save SRAM and NeoDS configuration to flashcard
• Fix crash when switching roms on certain flash cards
• Fix palettte bank swap bug on tile layer (metal slug 1 hud)
• Improve accuracy of vcounter, and vposition interrupts (fix freeze in Samurai Showdown 3, fix graphics in Blazing Star level 2, probly others)
• Fix issues when using dldi and slot2 ram from same flashcard (like supercard lite)
• Fix graphical corruption that occurs after a while when using slot2 ram

v0.1.1a 5/6/2008

• Forgot to include updated NeoDSConvert is last version

v0.1.1 5/6/2008

• Added level2 sprite cache in slot2 ram (if installed)
• Increased rom page size (fix grenades Metal Slug 1)
• Fix interrupt acknowledge (fix Metal Slug 2)
• Fix tile layer palette update (Last Blade 2 gui)
• Update converter to use latest MAME data (fix issues with King of Fighters 98, etc)
• Thanks to FluBBa for a DAA Z80 instruction that doesnt need a stupid lookup table (saves ram)
• Fixed -bios options in NeoDSConvert

v0.1.0 4/29/2008

• initial release

Project started Summer 2007

Credits

FinalDave, notaz, Reesy, Wintermute, chishm,MAME ,Minizip ,www.pocketheaven.com for hosting a NeoDS forum,FluBBa ,GnGeo, FinalBurnAlpha, MAME, MVSPSP,Charles MacDonald ,Alexander Stante ,Brandon Long ,Everyone who answers questions on the gbadev.org forums