After the release of the hack for Xenon, Falcon/Opus and Zephyr motherboards, today we get the Free60 JTAG/SMC XeLL Hack for Jasper (v4) motherboards with 16mb NAND chips (so NOT compatible with 256 & 512mb NAND yet)!
This NAND image will boot your Jasper Xbox360 right into XeLL, which allows you to launch linux distros or run libxenon homebrew software, as long as you never upgraded it via the normal MS upgrade procedures to kernel 849x or higher.
From the readme/nfo:
[QUOTE]
Finally the Jasper JTAG Hack is here
This is XELL (compiled 11.09.09) inserted into 6712 Jasper-Kernel.
Don't wonder about the Filesize, its correct like that. It just flashes the beginning of the NAND so your console specific data like MAC adress will stay.
Of course you should have a working backup of your NAND before you proceed.
*** NOTE ***
Only work with 16mb version, a fix may come out.