Effect of ROM port width of LE usage?

I was really trying to understand the architecture. Ie. What interface after you using for the data transfer? What is the data? What is the end goal?

From your description, it sounds highly inefficient. You would usually try and avoid ever doing what you're doing.. Load data, process data, save data... It all sounds a bit like software to me, and not how you would architect a system. This I'd why I asked for the architecture and the code, so I can better understand the problem.