Final Burn Neo > FBN Development
input lag is too high on certain games?
dink:
Tatsuya79, this is a hard one to answer. There is nothing wrong with the input system in fba, it responds perfectly. The thing is, every game uses an almost completely different timing method.
I found that donpachi & dodonpachi can both be improved, since they both have very similar emulation code.
Please check your pm :)
best regards,
- dink
dink:
Actually, going to need to look into this deeper. I noticed a nasty side effect. Back to the drawing board :)
dink:
Hmm, seems the best I can get so far is 3 frames in DonPachi / DoDonpachi. I can bring it down to 2, the tile:sprite layers get desynched. I'm not too convinced that these extra 1 or 2 frames faster response will help the games any - and I'm quite the master of both of them. I'm also worried that the timing differences might cause problems down the line, because I've been playing DonPachi/DoDonPachi for years in fba without issue. Anyhow.. my personal opinions aside - what do you guys think?
Tatsuya79:
Well, the shorter input delay is always the best, as long as it doesn't break anything.
I thought it was some particular problem but perhaps FBA is just using and older driver for this game that was modified at a later date in MAME, and that gave better result on the input lag front.
Perhaps it's different for neogeo games?
As some like Last Resort or Viewpoint react in 3 frames vs 2 for MAME, while other games of the same driver like KOF98 don't?
dink:
Don't worry, I didn't give up - I will not be beat. I have just been collecting recon with rant's inbetween... :)
dp and ddp are very very timing sensitive when it comes to vbl and sprite buffering, I mean, just a couple cycles off and it will do one of 3 things:
1: go out of sync with sprite:tile layer (usually when getting close to the 2 frames of reaction time)
2: go between 2-4 frames of reaction time
3: explode!
if you get it exactly right, it will react in 2 frames with no bad side effects. that being said, our dp / ddp now reacts in 2 frames. with no side effects. tonight I'll do the ultimate playtest.
p.s. fba doesn't use drivers from mame :)
best regards,
- dink
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