In what assembler to write OC?

Question

assembler

I know that there are different assemblers (NASM, MASM, FASM)
Which OS is better to use?
Or on any of them it is possible to write OS?

Answer 1

I would like to use maximum eloquence to dissuade you, but it will be much faster if you dig deeper yourself for an hour, you will get bored and you will give up this hopeless business.
So write to NASM.

Answer 2

A question from the category "I have never written anything in assembler, but I want to write no less than my own operating system."
Write in different assemblers for starters at least a tag or a couple of simple system utilities like "ls" or "dir" and decide which one you like best.

Answer 3

I suspect that this 'future case' is called 'term paper'.
In fact - do not care what to write on.

Answer 4

of course FASM

Answer 5

Hmm ... with such a formulation of the question, you can answer anything. Here, it is not indicated for which OS equipment, what type, and what it should be able to do.
If, for example, I once wrote a firmware for the PIC16F84A microcontroller, well, in terms of functionality, it was quite drawn to the real-time OS. Functions to be executed were calculated down to the clock, interrupt processing and I / O were also calculated in a fixed minimum time, which could also be interrupted to process some more urgent events. And yes, I wrote some kind of ASM, which I took directly from the documentation for the controller.
PS You can write directly in machine codes if you know how.