Someone has finally made a drawing app which can compete with mine!

* DLDI
* Saving & Loading to BMP
* Pencil and Brush tools
* Paint Bucket
* Blur tool
* Zooming — allows to draw an image 2x the size of the screen
* Undo/Redo
* Nice GUI

Things that it’s still missing which I had:
* Save & Load to PNG
* Save & Load to SRAM (for flashcart users, and slot-2 devices which have no DLDI)
* Slow paint fill — his just fills everything
* Nicer color picker — his makes you twiddle with R,G,B sliders

Give it a try!
Phidias

The DS Motion Card is a motion sensor addon for the Nintendo DS. It contains a 3-axis accelerometer, as well as a 1-axis gyro sensor. The creator was kind enough to send me one, so that I could play with it and make stuff for it to help him promote it.

Anyway, so far I have made a simple marble demo, tip your DS and marbles roll around. Currently it’s very simple, no collision detection or anything. I’m probably going to make a game out of it, simulating those little keychain toys where you have a few marbles, and you have to get them all into their respective holes.

Download:
Marbles.nds
SourceCode

NOTE: To build, it will require a CVS version of libnds, dated 2007-01-10 or later. Dovoto added ndsmotion code into libnds, as well as a nice simple example.

I’ve decided to put my collection of official DS Download demos online. It is the most complete collection online that I am aware of, please let me know if I am missing any. The only other large collection I know of is at sgstair’s wiki, and it is missing a bunch of the newer ones. I’ve made a php script which will automatically pull out the icons and file info directly from the .nds file. Now if only I knew how to design webpages, I’d make it look nice, but it’s functional enough for now.

Check it out here: Downloadable DS Demos

Legal disclaimer: I am putting these online in good faith that Nintendo and the respective copyright holders wish them to be distributed, as they are only demos, and are not (and have never been) sold anywhere.

UPDATE: Added a few new demos: 2 from English Training, 2 from Dragon Quest: Rocket Slime, and 1 from Lode Runner. The ‘Tank Battle’ demo from Rocket Slime is a fun one.

UPDATE 2: A new batch of DS Demos uploaded

I made a quick port of Mathomatic to the DS. This is an algebra tool, simplifies, solves equations, et cetera. It’s still not as cool as the dslinux version, since the default libnds console doesn’t have color. But it has the advantage of being easy to start up and use.

Download MathomaticDS (includes sourcecode)

A couple of people have been having problems with dumped ROM files coming out corrupt. Turns out this is a known problem, if you are interested in the gory details, check out this site.

For those of you who just want it to work, I’ve taken the code from the above site and ported it to C, to make a simple TI-85 ROM fixer. In order to use it, you must know your own ROM version first.

Make sure to read the included README file!

Download: fixrom.zip

I’m working on improving the timing code to DS85. Right now, in ‘Real Speed’ mode, it kinda stutters. In the next release, it will be nice and smooth, and I’m trying to make it indistinguishable from a real TI-85. Along with better timing code, I’ve implemented some code which should allow greyscale apps to run. Unfortunately, greyscale is difficult to emulate, due to the nasty tricks they use to make greyscale on the 85 . Right now, it works some of the time, but other times it flickers badly.

Some screenshots:

Here’s a couple screenshots of it running M.C.Mik (which actually works pretty well, though I’m not sure how to beat it. I should probably read the instructions or something)
A screenshot of Daedalus (a 3d ray-casting engine)

Also, I added a rotation mode (so you can play games like Tetris Attack, Dr. Mario, Puyo Pop). Here is a comparison of the four display modes available, using good old Dr. Mario.

Normal mode	Stretched
Rotated	Rotated and Stretched

Here is the second release of my TI-85 emulator port. New features include:

• Saving & Loading State
• Support for loading Virtual TI save states
• ROM & Save/Load support for non-libfat devices (GBA Flashcarts, EZ4, G6)
• Can turn frameskipping on & off (when skipping is on, speeds things up a bit)
• Can toggle between real speed and full speed. (full speed is actually faster than a real TI, but it makes it hard to play games)
• Comes with an included save-state with several games already loaded. (Usgard shell, ZKart3D, ztetris, solytare, jezzball, Lunoid8, mineswp, and PhoenixZ)
• Toggle between proportional and stretched scaling modes

Download DS85 R2.zip now!
Download a video (5.5MB) of it in action!

Tip: If you want to load some apps to the emu, right now an option is to use Rusty Wagner’s excellent windows-based Virtual TI. Create a save state from there, and rename it to ‘ti85.sna’ and place it on your CF/SD card.

Make sure to read the included README.txt file completely!

NOTE: Make sure your TI-85 Rom is version 10.0! Other versions have not been tested, but may work. However, they will definately NOT work with the included save state. To check rom version, on your calculator type ‘[2nd] [MODE] [ALPHA] [S]‘. Press any key EXCEPT [ENTER] to exit this screen. (Pressing [ENTER] will erase your memory)

UPDATE: I believe there was an error in the flashcart version. Please redownload and try it again. Also note that the copy command was possibly INCORRECT. Check the README.txt again, it has been updated with the correct copy command. Thanks.

Some (cropped) screenshots. (The below files are all included in the save state in the zip!)

Plan for version R2

• Save/Load state
• Autopress ON key for you (so you don’t have to worry about it)
• Works on standard GBA flashcarts without libfat support
• Map hardware DS buttons to TI buttons

Current keymapping plan:

The way I chose the ABXY buttons are based on which keys are most used in assembly games.

Plans for version R3 and beyond:

• Loading state from Virtual TI save state files (so you can make a nice save state on your PC, with lots of files/apps/games, then transfer to the DS)
• Transfering files directly. You can just copy *.85? files to your CF/SD card, and then load them onto your TI from a special menu
• Different on-screen button layouts.

Request for help: If anyone can come up with some nice button layouts, I can put them in. MrShlee made some here, however the links no longer work.
Personally, I prefer all the buttons easily accessible on a single screen. Though I might try his method of having two screens, just to see how it works. Also, I would prefer button layouts similar to what I have, and not ones based on a photo, like I had before (unless you make it look really nice & clean). Of course, I will put your name in the credits & readme. Thanks!

I’ve revisited my TI emulator for the DS. This port is based on new sources, and ONLY supports the TI-85 (which is what I own anyway, so fine with me).

Currently, it seems to function well. Speed is very close to 100%.
There are still a few things to clean up and add (currently no save-states, or any way to transfer files to it), but it is now usuable for most calculations & graphing. The keypad is also nice and responsive (unlike the buggy previous version).

Download DS85 R1
Check for the latest version!

It supports all libfat-compatible devices, which means pretty much anything that takes a CF or some type of SD card. Let me know if it works for you. Be sure to read the included README.txt file!

DSOrganize is back! Please visit the official page. I am NOT the author, and CANNOT provide support. Since this is a free app, most likely he cannot support you either, if you cannot figure out how to make it work.

I’m mirroring it here because dragonminded apparently flipped out or something and deleted it off his own website.

Unfortunately, to compile DSOrganize source also requires a ‘libdt’ which appears to a simple date and time library. I cannot find a copy of this anywhere, so you may have to rewrite the library, or change his code to use standard libnds date/time functions. It shouldn’t be too hard.
Also, I didn’t find the source to libfb, which may pose a problem in the future. But it may be linked out there somewhere, I didn’t look too hard.
UPDATE: Missing files provided by Deathwind

Some related links:
http://dev-scene.com/DSOrganize
http://www.dcemu.co.uk/vbulletin/showthread.php?t=36519
http://www.dragonminded.com/?loc=ndsdev/DSOrganize
http://www.youngmx.com/forums/viewforum.php?f=11
http://dragonminded.blogspot.com/