I'll make it clear then, the goal of colors is just to customize
What colors?

Code:
, my system is not to be a msdos it is just to have similarity but to use all the ways of communication thus being 64x.
So MS-DOS has nothing to do with it, you just want to build an OS with a console-like interface. And again: the CPU mode has nothing to do with the interface.

Code:
 Now go to the other answers basically the current systems are not the best in calculations
There specialized systems for "advanced" calculations. That is when they're really needed. Why would you need to do calculations beyond the capicity offered by the software and hardware available to the regular user?

Code:
 there are quantum computers and other architectures
Unless you have access to a quantum computer I don't see how this is relevant.

Code:
 so the idea is to create a simple 64x console system in assembly that is focused on calculations example calculating PI
PI has already been calculated to a precision no one with access to specialized equipment could ever hope to achieve. Why would you want to do that anyway?

Code:
 using more power because it takes up less memory and uses everything from the computer each program being able to use its guide and color. as it was in msdos i used msdos as an example of color customization and definition only.
Yes, I think this point has been made clear enough. You want a terminal interface.

Code:
 now the big question is a small system like this doing it in 64x achieving good and fast results because it will not go through many layers of processing and does not call many dependencies being ideal for this function just calculations directly on the machine.
I haven't searched for it, but wouldn't there already be specialized software that allows for more direct access to a computer's hardware?

As some other forum users have already asked, what have you done so far? What is your background?