How to compile your kernel (not using buildroot):
1. Build yourself a cross compiler for arm (little endian), you can use buildroot and the nspire-scripts.
Than add the binarys to your PATH (if they dont have a prefix like "arm-gcc", add one)
2. Create a new folder for your build
3. clone tangrs git tree with "git clone git://github.com/tangrs/linux" and "cd linux"
4. Download my patch (for X, directfb...) "wget
http://dl.dropbox.com/u/105478372/fbdev.patch" and apply it "git apply fbdev.patch"
5. Edit "Makefile" and search for "ARCH ?= $(SUBARCH)" and change it to "ARCH := arm".
Do the same for "CROSS_COMPILE ?= <something>" and change it to "CROSS_COMPILE := <your arm-gcc-prefix e.g. 'arm-elf-'>"
6. "make nspire_defconfig"
7. "make menuconfig", "make xconfig" or "make gconfig"
Configure it suitable for your needs, but enable (Search using "/"):
CONFIG_EXT4_FS
EXT4_USE_FOR_EXT23
CONFIG_SCSI
CONFIG_BLK_DEV_SD
CONFIG_USB_STORAGE
CONFIG_SWAP if you want to use swap
CONFIG_STRIP_ASM_SYMS if you dont want to debug the kernel
disable CONFIG_LOGO if you want to see longer errors on your screen without scrolling
For internet you will need:
CONFIG_INET
CONFIG_NETDEVICES
For WLAN:
CONFIG_CFG80211
CONFIG_MAC80211
and the driver for your WLAN-dongle, you can get the name with "lsusb -v".
If something doesn't work, there are many tutorials on configuring your kernel.
8. Compile: "make zImage -j"
9. Make cup of coffee
10. Drink it, but be careful, it may be hot
11. "mv arch/arm/boot/zImage zImage.tns"
12. Copy it onto your calculator
13. Boot
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) works on my desktop..