Design an 8-bit adder block that can add any two 8-bit registers from a bank of 10 registers and store the result again in any one of them.

Hello, I am engineering student in Turkey.

Our teacher gave us a homework. I took care of all but this question. But I couldn't do this question. It is very complicated, I just could not put it in my mind. Can you help me?

Thank you

For the Register You can use D Flip Flops or Register IC's.
The adder You must built from used in the course.

The output from the adder can take the result into a register can be done by an Multiplexer with disable outputs.
An analog multiplexer is possible a solution too - like C-MOS 4051 or an derivat.


I think the thing has to be clocked ( Register Load, ADD, Output ).
So You need a Clock Source - possibly with more steps.

You could tri-state the output of the 10 registers. Essentially do it twice. Each register has two tri-state outputs that feed the adder.

A BCD to decimal converter adds more fluff, but isn't essential, but it does prevent two buffers being on simultaneously.

What course are you studying?

Mike.

You could tri-state the output of the 10 registers. Essentially do it twice. Each register has two tri-state outputs that feed the adder.

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Good Idea.
You need the same Procedure for the Output of the Adder, to reload the register.
It has to overwrite the the Pre loaded Values.

I guess the thing would be quite complex.