problems with castlevania 2. the title screen is ok, the start/password screen is jumpy virticaly but about 5 tiles (and several inbetween). also, the background is wrong too ( i think that might be a mapper problem ?)
after i hit start, the town is all jumpy, again about 5 tiles with a few inbetween. walking right will stablize it. the sprites are fine.
i was watching the ppu address at the beginning of the render frame and it was eratic. the lower 3 bits of the virtical tile were eratic, and the lower 2 of the fine virtical were eratic.
i was messing with the vram address registers and the virtical increment durning rendering and didnt find the problem. i tried changing some code around to break it (thinking i would get closer to the problem); that did mess up the graphics but the garbage graphics would jump up and down the same.
at the moment i am at a loss. any idea's
thanks
matt
after i hit start, the town is all jumpy, again about 5 tiles with a few inbetween. walking right will stablize it. the sprites are fine.
i was watching the ppu address at the beginning of the render frame and it was eratic. the lower 3 bits of the virtical tile were eratic, and the lower 2 of the fine virtical were eratic.
i was messing with the vram address registers and the virtical increment durning rendering and didnt find the problem. i tried changing some code around to break it (thinking i would get closer to the problem); that did mess up the graphics but the garbage graphics would jump up and down the same.
at the moment i am at a loss. any idea's
thanks
matt