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Zero Team U.S.A. (zeroteam) Bad sprite priority.

Open fastpop72 opened this issue 4 years ago • 8 comments

In Zero Team during a 2 players game the P1 is always on front.

zeroteam-03-09-134204

fastpop72 avatar Mar 09 '20 13:03 fastpop72

Actually Zero Team has protection issues there are many problems with this game including but not limited to the hitbox plus enemy movements and attacks being wrong and or incomplete

You need to use the following versions which are 100% emulated.....

New Zero Team Zero Team 2000

So your graphical problem might be a prot issue try the other versions and you'll know either way.

arcadez2003 avatar Mar 10 '20 00:03 arcadez2003

@arcadez2003 Yes you're right... anyway i know this game has unemulated protection but probably in mame there's a workaround for the issue i pointed because sprite priority is correct.

fastpop72 avatar Mar 10 '20 07:03 fastpop72

It seems MAME partially solved the sprite priority issues with https://github.com/mamedev/mame/commit/69c66e3046773d6d8ccf9b528e35289607e5e5d4, the game is still supposed to have some though.

barbudreadmon avatar Mar 10 '20 09:03 barbudreadmon

So it's definitely a workaround...

fastpop72 avatar Mar 10 '20 09:03 fastpop72

I would call this a partial fix because it seems to respect hardware (a workaround is basically a hack). I'll try to backport it this week.

barbudreadmon avatar Mar 10 '20 09:03 barbudreadmon

barbudreadmon, unfortunately that is not the reason for the p1/p2 sprite prio inconsistency. I'll let you know if I find something else.

dinkc64 avatar Mar 10 '20 23:03 dinkc64

40 minutes of re-con later, all I can say is good luck & mark it as not working if you don't get anywhere with it. (reasoning: no reason to waste any more time on a broken game when 2 good versions are available - or - Confucius says: polishing a turd leaves you with polished turd.)

dinkc64 avatar Mar 11 '20 00:03 dinkc64

If that wasn't too reassuring, let me say: if something leads to this version of game being properly emulated, I won't stop until this is perfectly working in FB. Until then, this version should not even be played in fb,mame, etc.

dinkc64 avatar Mar 11 '20 00:03 dinkc64

blippity bloppity bloo

dinkc64 avatar Jun 09 '23 06:06 dinkc64