I just use emulators to play all consoles I want in my laptop.
But GB and GBC on a Nspire would be great too.

I can advice you the emulators for GB,GBC,GBA, NDS, Atari and Mega Drive aka Genesis.

I know some, actually, except for DS. For DS I know No$GBA but it doesn't work, it just break my windows install and I have to reformat my PC a few weeks later.

Desmume has already passed NO$GBA in many graphics bugs and is getting close to its speed. (play around with max frame skip to 1 or 2 and limit or not frame rate, it depends on the game)
Also it is better for gaming because of save games, save states, allow to play zipped games (NDS games are huge!) and overall configuration is easier to get used.
It can also film your games and print screens are easier than NO$GBA. ^^

Some say strange damages of NO$GBA on pc like problems with graphics card but on mine, hopefully there wasn't any problem that seems related to NO$GBA. I don't know any weirdness about Desmume.
PS: now you can even import No$gba savegames and others save formats. Other emulator is ideas but it doesn't seem a great emulator but some use it in certain games.

I've begun Game Boy Color support - however, there are still a ton of glitches. But at least this scene looks nice:

Wow! What game is that?

Legend of Zelda: Oracle of Ages

That looks awesome.

Colors into 16-level gray fits quite well.

Quote from: Galandros on December 07, 2009, 03:45:16 pm

Colors into 16-level gray fits quite well.

Does the Nspire already have 16 level grayscale, or will he have to make it?

The lcd comes with 16-levels of gray. Do you think TI would implement itself grayscale in software?

Quote from: Galandros on December 07, 2009, 04:12:48 pm

Quote from: ztrumpet on December 07, 2009, 04:11:26 pm

Quote from: Galandros on December 07, 2009, 03:45:16 pm

Colors into 16-level gray fits quite well.

Does the Nspire already have 16 level grayscale, or will he have to make it?

The lcd comes with 16-levels of gray. Do you think TI would implement itself grayscale in software?

So he must control the lcd just right?  That sounds easier than 8 level on and 83. :0

The lcd takes care of doing good grayscale.

It should be much easier than 83. (and 16 level in 83 is pure craziness)