Linux already on HP Prime G2!

[Jean-Baptiste Boric]

Well, just about the only thing in common between G1 and G2 is that they look identical externally. They have completely different hardware, firmware, OS, recovery, booting mechanism and so on. Also, unlike the G1 we can't just hitch a ride on HP's firmware because a chain of trust is enforced (however, a root of trust is not enforced, so booting non-HP firmware is possible through the SoC's recovery, it does require opening the calculator up but hardware mods aren't necessary, I guess Zephray never tried to apply 3.3v on TP907 during reset).

I've had SoC's recovery and JTAG running since last December, but I just couldn't get the gosh darn DDR controller to work. That's the main breakthrough of Zephray (alongside reverse-engineering most of the hardware on the way) which allows running U-Boot and Linux on the calculator. I'm must say I'm thoroughly impressed by how quickly Zephray achieved such results in less than a week. Then again, reverse-engineering hardware is really not my cup of tea, it's cool seeing in action someone who actually knows what they're doing at this stuff.