The game guide on this website does as you say.So wait you have been using the bottom left as A1?
I do not. Bottom left for me is H1.
It's an issue. I think back in the day the bottom row was A when talking about the Zelda1's overworld map. But the HW game guide uses H for the bottom row. Conflict in the naming there. As long as each guide states what naming they are using (A or H for the bottom row) then it's all good and we can understand it.