For both of these I doubt the kernels will support it.
But if you want to use them, go for it and compile your own kernel

You have to extract the tarball on the USB drive (with 7-Zip for example) though I don't know if you can mount it on Windows.
And the 'X' command shows some stuff in the terminal, flshes screen off and back on, then just blackout. How can I switch tty's without F1-F7 keys ?
Also ctrl+var+del doesn't kill it. I take it for frozen now.

OK, I found a way to mount ext4 under Windows with Ext2Fsd

Just a heads up that minimal kernel support for Nspire CX has been merged into mainline today. For devs, this means you can clone Linus's repo and build a Nspire CX kernel We'll also be seeing more patches for the Nspire come up over the next week or so.

Unfortunately, the last patch required for the classic models missed the merge window so we probably won't see mainline support for the classic models until next round

Can I git the kernel source tree and just compile the kernel for Nspire, or is it more difficult than that?

Yep, just equip yourself with an cross compiler and a copy of the latest kernel sources and you're good to go

Just a heads up that minimal kernel support for Nspire CX has been merged into mainline today. For devs, this means you can clone Linus's repo and build a Nspire CX kernel We'll also be seeing more patches for the Nspire come up over the next week or so.

Pretty awesome to hear ! I hope this is another step on the way to Linux dev on the Nspire.

I finally got it to boot all the way to login, and then I decided to get a larger rootfs. I just tried the latest zImage and xconfig rootfs and it just displayed colored fuzz until I pressed the reset button to reboot. So I decided to switch to a defconfig kernel, and then it couldn't load the rootfs, so I hit reset again. Does it just sit on the fuzz for a long time (due to the 28mb rootfs?) or is the rootfs too big?

EDIT: I am currently testing all the different combinations of .tar.bz2 and .ext2.bz2 rootfs (I was using .ext2.bz2 before) and the last 2 days of rootfs and kernel builds.

EDIT 2: All of the kernels work, but only with the minimal (busybox only) rootfs. Otherwise it panics about mount_block_root and prepare_namespace and kernel_init_freeable.

Is it not going to be possible to use a larger rootfs due to RAM limitations? If so, since 16mb is too large, then what is the maximum size (using either the defconfig kernel or the expanded kernel)?

EDIT 3: Also, could someone direct me towards a compatible USB hub?