Bootstack vs bootloader topic

So I'm currently on cloudy g3 and have twrp 2.8.5.1. I'm not bumped, I am loki-ed.

I want to install blisspop Rom but it requires 12b bootstack.

My question is how do i know if I have that or not, and what's the difference between a bootstack and a boot loader?

Sorry for the noob question. And thanks for any help
-art

Flashed the 12B Bootstack to a D803. Help? topic

Hey guys, so I did something fairly stupid. I was following a guide to try Bliss LP, and made the mistake of flashing the 12B VS980 bootstack to my D803. Still have recovery, but I can't seem to find a D803 bootstack to flash in order to get back. Any suggestions?