I have also created a TI83 emulator for the GBA.
See "URL" of this post.

How do you manage that? Be in Calculus wit ha GBA SP or DS in my hand and the teacher would be like "PUT THAT AWAY!" and I would be like "It's my CALCULATOR!" Then I would be written up for having game based electronic devices in school...
Now is there a TI83+\TI 84+ Emulator for the TI-89 Titanium?

The GBA emulator is pretty slick as is Jim's DS one. I was hoping that someone would write one someday :).

And the real question (orig from elfprince13):
Can I run it using a Windows based DS emulator under DOSBox on a PPC Mac? :D

Probably not, if only because DOSBox is really picky. I couldn't even get TIE Fighter (a DOS game) to run in DOSBox.

No, because DOSBox ... is a ... DOS ... emulator.

"This program cannot be run in MS-DOS mode." would be about all you could expect from a Windows program run in DOSBox.

To be fair, very early versions of Windows (2 and possibly 3?) will run in DOS Box. :)

Nice, I like it! But I would rather have an emulated 89.

This was great, I run it on my ds in the hand I'm not writing this message with :P. The best ds application yet. I can't wait until I can test games and file sharing with my friends.

I like how it shows Spencer's Zelda in the video.

This looks awesome.

Hey, pretty neat! Can you write assembly on it too?

Now if it can make use of the DS's wireless transmitter for linking is when this will be totally useful to me! Ztetris and Age of Empires multiplayer wirelessly! :P
Stil, any word on an onboard 83+ Emulator for the 89 TI?

Link support would be very impractical due to how linking works. Linking works by having one calc turn one wire low, then the other calc follows and sets the other wire low. Trying to simulate that over a wireless connection would result in huge lag, and transfer rate would be through the floor.

If you assume that the calculator is using the standard TI way of sending bytes (which it will be, most of the time), you can read bytes from the emulated calculator, buffer them, send them across the wireless link, then have the receiving DS internally send them to its emulated calculator. You don't actually have to send events across the network every time a wire gets turned on or off.

The DS's transmitter is a burst transmitter or packet transmitter, depending on the host program's specifications. A FPS DS game will have more streaming wireless than a minigame over the wireless.
If a compiler can gather the information that needs to transmit for a link, then send it as a burst transmission to the recieving calc, and disassemble it, then there won't be as bad of lag. It would be faster than trying to stream the Z80 speed...
Now be able to have a minibrowser on a calculator emulator using Wi-fi would be funny to brag about. "Oh yeah, I got the INTERNET on my calculator!" (This would be only possible on a 68K Emulator...)