Hey guys
I made a repro of Ufouria using a TLROM and everything works great. My question is has anyone been able to do this without having the weird lines on the right side of the screen. when you move to the right (and sometimes the left) the screen gets one column of lines the keeps regenerating a bit. I checked the rom I have and it does the same thing on the emulator. I have tried different roms and they all seem to do this. is this how it is on the original game?Is there a patch or a different version that does not do this. thank you all in advance.
Do you see the problem at the right side of
Super Mario Bros. 3 or the trailing edge of
Kirby's Adventure? And do you see the problem at the top and bottom when climbing the slope in the first level of
Super C? If so, it's a known limit of 8-directional scrolling on the NES.
Technical details:
It's caused by nametable mirroring. It can be avoided by using more memory in the cartridge, but only three games (Gauntlet, Rad Racer II, and Napoleon Senki) bothered with that because of cost.
Thank you for the response.I am not sure what you mean by Mario 3 and Kirby because Ufouria is the only game on the cart. Maybe I am misunderstanding. I don't think it is the board I think it is more the Rom because it happens in the emulator too. But again I tried multiple rom and they all seem to run this way in the emulator.
This happens on actual hardware. MANY NES/Famicom games do this.
Hint: next time you go making a repro, maybe you should "get familiar" with the game/the way it looks/behaves first. Or you could take the time to review Youtube videos -- ones that are of the game running on actual hardware, and not emulators (it's quite apparent which are and which aren't, but it's harder to see because many peoples televisions are hiding part of the crap).
Tepples' question is both correct *and* confusing because he's pulling unrelated games into the conversation and bringing code/development discussion into a thread (when not really applicable). Ignore it.
nes gamer wrote:
Thank you for the response.I am not sure what you mean by Mario 3 and Kirby because Ufouria is the only game on the cart.
What I'm trying to say is that the artifact you're seeing is common in NES games. It appears, for example, when you play
Super Mario Bros. 3 or
Kirby's Adventure on an authentic Game Pak manufactured by Nintendo.
Let me rephrase:
- Obtain an authentic Game Pak of one of the games I mentioned for your region. For example, an authentic SMB3 cartridge will look like this.
- Start a game.
- Look for the same artifact that you see in your reproduction of Ufouria.
I understand now tepples. I am sorry just got a little confused. Thank you for the insight.
Koitsu I am sorry if it sounds like a stupid question. I do thank you for your responsored. I did check youtube and it seemed like all the videos were off emulators. I have made multiple repro and just never seen this at least not as bad as it is on this game. It is the same as all the you tube vids.so I am sorry but just again this is normal?
Yes it's normal. Just because you see a glitch in an emulator doesn't mean it's the emulators fault. Real games have all sorts of visual problems, and the NES emulators are for the most part getting it right.
tepples wrote:
It can be avoided by using more memory in the cartridge
Here's my obligatory "it can be avoided without more memory in the cartridge too, through programming tricks" post. Few games bother fixing it with software tricks though (off the top of my head there's Jurassic Park, Felix the Cat, Alfred Chicken and Super Cars), probably because of cost too (why waste the programmers' time fixing something most people don't care about?).
nes gamer wrote:
Koitsu I am sorry if it sounds like a stupid question. I do thank you for your responsored. I did check youtube and it seemed like all the videos were off emulators.
These are definitely not, but I'm not sure if your eyes are necessarily good enough (I say that respectfully -- if you couldn't determine what's off real hardware vs. isn't) to see the same behaviour:
https://www.youtube.com/watch?v=J3rCgTZxLiY -- quite visible at 1:18 (right side), heavy cropping due to their TV/LCD
https://www.youtube.com/watch?v=pXvgBQQSZ3g -- see 3:24 onward or so (right side, bottom of screen) -- video compression here is nuts
And I already covered why the "glitches" look different.
Wow I clearly did not watch enough of the video with the TV. Thanks again everyone for your input. Sorry for not looking harder myself but I do appreciate everyone's help.