Looking for some ideas... I'd like to implement a Nemesis style scroll in screen 2. So basically the whole screen moves 1 row to the left and a new row of characters is drawn on the far right.
I had the idea to use a fast vram copy and move the first 39 rows to the left, but that doesn't seem to be possible. There is a vram to ram and a ram to vram function, so that could be a solution, but is this fast enough?
Another way seems to be to peek the entire screen and poke the characters back with a negative offset, but that means you're reconstructing the entire screen byte per byte.
What would be the best solution?
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