Since this sounds like homework, I ll start with some pieces.

1. Have you worked out the logic to this problem yet? "Kind of stuck" could mean you have no idea how this needs to be done, or that you re not sure how to implement it with the available instructions. If you haven t worked out the logic, consider this - how do you come up with the terms, how do you add them together, and what do you do with the results?

2. If you have worked out the logic, then which commands will perform each part?

If you have more specific questions feel free to update and I ll respond, but generally the policy on SO is to offer guidance rather than just write code for (possible?) homework questions.

Edit: ok great, you ve got some code, and it looks like you re on the right track but not there yet. The first thing I would ask you is whether you have tried to execute the code on paper. Pick an arbitrary input (say 5, as in your example) and step through the code one instruction at a time to see if the logic that the program performs follows the logic that you came up with in step 1. Right now I believe the program doesn t work as written; see if you can find out why and if not I ll give you a hint.

Edit 2: awesome, you re so close that you already have the answer and just need to code it. You said you want to repeat until n reaches 0. So, which command will let you take one of two branches depending on whether n is 0 or not?

Edit 3: you are correct in assuming that you need to use branch if 0 / branch not 0, but I don t see any of those in your latest code. Did I miss something? Also, what is DC for in this case? It might be helpful if you post a key so I know exactly which instructions you re using. As I said before, try executing your program by hand - that will show you where the bugs are. My hint for you right now is to identify the portion of your code that needs to be executed repeatedly and find out if it actually does get executed repeatedly.

Try writing out the problem in a high-level pseudo-code first.

Then translate it to your assembly language.

You can find help on programming in assembly language here

http://www.laynetworks.com/assembly%20tutorials.htm

This smell like a school assignment, so I think that should be enough to get you going.

think about it in C (assuming you know it)

int sumnumbers(int input)
{
    int output = 0;

    input = max(input, 10);

    switch (input)
    {
        case 5:
            output += 5;
        case 4:
            output += 4;
        case 3:
            output += 3;
        case 2:
            output += 2;
        case 1:
            output += 1;
        case 0:
            output += 0;
            break;
    }

    return input;
}

note the lack of break statements (except on the 0 th case).

Does this help?