3DS can run DS games but the DS(i) can't run 3DS games. That's probably why they redesigned the game cards.
http://cache.gawkerassets.com/assets/image...06/9e3b3550.jpg
Right, same as you can't run DSiware on a DS Lite. But (as above) I wouldn't rule out dual-mode releases either, seeing as there's a depth slider for the 3D display which runs all the way down to zero i.e. 2D mode.
The redesign appears to be all of a key nibbin, which is great for fending off tech support issues but says nothing about compatibility - at least, without seeing confidential specification documents. If you can't do a dual-mode, it's because someone at Nintendo foolishly went out of their way to prevent it. It's the sort of thing developers would love, and it's the sort of thing which will drive 3DS development. The DS has a major pre-established customer base that the 3DS is lacking. 3DS development could really use the jump start of that many extra potential sales.
There's no official info
here either way, this is just my own speculation based off the limited available information, my knowledge of electronics design, and my knowledge of game development & production. It would be a huge plus for developers (and thus Nintendo) if it was available, and it should be quite easy to provide (simply don't break software compatibility) but it might not be.
On the other hand, if that's not possible for some reason, developers will probably still be able to release two different carts for DS and 3DS without major porting provided that Nintendo hasn't magically redone the entire SDK from scratch. Which wouldn't happen, for the reason of time and developer outrage alone.
Kingfield said:
Dont say you have read anything if you think that a 3DS is simply a DS with 3D enabled.
Oh, good. I really enjoy when people reply to my posts without actually reading them first.
BobTheJoeBob said:
lolwut. 3DS has improved hardware and graphic capabilities. Games on the 3DS won't be able to run on a DSi or XL.
It does have updated processors - which is great seeing as we're talking console-type devices and the extra speed won't do crap for DS titles. It's just there to enable the double-render for the 3D display and to provide some extra oomph to support 3DS-only titles. The "improved" capabilities you speak of are meaningless outside that context, and the XL still has a bigger screen.
QUOTE(BobTheJoeBob @ Aug 30 2010, 06:34 AM) Their completely different consoles. Like the transition from GBA to DS.
No, that's just more FUD and misinformation again.
QUOTE(thedicemaster @ Aug 30 2010, 09:29 AM)
i think specifically support for the DSi will be dragged on a while after the release of the 3DS.
mainly because they are aimed at different markets.
DSi(especially the DSiXL) is aimed at family and casual use, while the 3DS will be aimed more at gamers.