The calculator is not just a plain pocket calculator. That would be very stupid.

Im actually building (already built) a Braille calculator. That is a calculator which speaks. Everything from operations, to results, to date and time. It's done and working perfectly. But now Im thinking of manufacturing it... so Im looking for alternatives.

My problem is that I had to dig into the calculator assembly program I wrote, and inside the functions, I had to trigger the voice chip, to speak at CERTAIN addresses. So it was not that simple.

I think if i use a calculator chip, then i will have to understand EVERYTHING in it. Or what do you think?