I've seen this in a few emulators (including my own). Any ideas what the cause of that is? Pretty sure its done with SP0 hits, which occur on line 199, pixel 253/254 (alternating every other frame).
I'm thinking the problem might be that the scroll Y might be incremented a bit too late and the write isn't over-writing it properly? I have it increment at pixel 256?
I'm thinking the problem might be that the scroll Y might be incremented a bit too late and the write isn't over-writing it properly? I have it increment at pixel 256?