Auto zoom hurts. At least in FS-UAE. The story is short, but actually it took me (it hurts…) a week or so to find the guilty.
I was playing with totally basic Copper stuff. Two bars moving up and down, up and down. And up and down. Until you press LMB.
That simple code worked but the bars were extremely slow, freeze actually, when moving through middle of the screen. I still did not buy a new computer, and still using that T60 with core solo crappy Intel, but come on! Two copper bars?
I was playing a bit with fs-use performance settings – video_sync, accuracy, A500 instead of A1200. To no avail. Is this really that hard to emulate Copper?
By an accident, and somehow inspired by that “auto” lines printed to the FS-USE stdout, I pressed F11 and zoom mode was changed to full what… made a huge difference. It was like a boost ;)
And I can go to bed now. Thank you F11.