[Q] Boot loader/bios Info for x86 android devices

Hi,

is there any general information about "how booting on a x86 Android device is working"? Is there a bios involved?

I ask because I like to hack my Asus MemoPad7 176cx. I'm familiar with Linux on normal x86 devices, but I'm missing those information about BIOS, UEFI a.s.o on Android devices.

Could somebody help me?

thanks
Stefan