Hello.when I download rom.bin (debug.x of this file works well) and power my board up, nothing happens, even led doesn’t light. reset pin is very unstable so that my board doesn’t work. what should I do? 
p.s. I disabled nvram in narmbrd.c
if no green LED, first thing to check is the CS0 settings in the init.s - make sure they are right
Thank you. my board boots from rom now! 