It is possible, it'll just be a very long, painstaking task. Any chip for the SNES games can be emulated really, it's just that the developers of these emulators don't want to have to deal with the hassle, so they just say "it's impossible" and leave it at that, making people think it's not possible.
When people say "it's impossible" they usually mean "it's impossible to play it on the DS because the chip is not emulated yet." I haven't seen very many instances of "the chip is impossible to emulate" at all. Sure, if one spent enough time working on it, they might be able to get it working. However, keep in mind that this SA-1 chip is 3 times faster than the SNES's CPU itself. In addition, I highly doubt it would work without the use of a full software renderer, which would further slow things down to a crawl. All SNES emulators for the GBA and DS use hardware emulation, which reduces graphical accuracy but greatly improves speed, but the SA-1 chip likely does things the DS hardware simply can't replicate easily, so everything would have to be done in software. If you've ever used v0.4a of jEnesisDS, compare the HW renderer build with the SW renderer build. It will give you a rough idea of what I'm talking about (though the HW renderer is more accurate than the SNES emus for the DS are).
It's one of my all-time favorite games as well, but I don't think I'd be able to put up with playing the game at 30% speed. Heck, even with the speedhacks I created, the game requires frameskip to run at full on the PSP, which is much more powerful than the DS could hope to be. It uses a software renderer, just for the record.
QUOTE(noONE @ Jan 16 2008, 05:03 PM)but as you said, it would be quite a hassle for just one game, but thats, one REALLY good game.. ( or is it the same chip as in other games? like Mode 7 style games-DKC series , starfox and such? , super FX chip, right?)