Thank you KurtE for info. Helped me to understand.
On another note, is there a way to control GPIO by assembly code?
As edison is listed as :"22 nm Intel® SoC that includes a dual-core, dual-threaded Intel® Atom™ CPU at 500 MHz and a 32-bit
Intel® Quark™ microcontroller at 100 MHz"
I am not sure, which assembly code to be used, or how.
I am looking to control GPIO turn on and off in sub micro second timing.
Is this possible?